/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.use.bitabs.translation false -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/systemc/kundu.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-21 11:10:34,431 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-21 11:10:34,512 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-12-21 11:10:34,517 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-21 11:10:34,518 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-21 11:10:34,545 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-21 11:10:34,546 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-21 11:10:34,546 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-21 11:10:34,547 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-21 11:10:34,550 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-21 11:10:34,550 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-21 11:10:34,550 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-21 11:10:34,551 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-21 11:10:34,552 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-21 11:10:34,552 INFO L153 SettingsManager]: * Use SBE=true [2023-12-21 11:10:34,552 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-21 11:10:34,552 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-21 11:10:34,553 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-21 11:10:34,553 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-21 11:10:34,554 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-21 11:10:34,554 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-21 11:10:34,554 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-21 11:10:34,555 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-21 11:10:34,555 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-21 11:10:34,555 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-21 11:10:34,555 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-21 11:10:34,555 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-21 11:10:34,555 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-21 11:10:34,556 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-21 11:10:34,556 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-21 11:10:34,557 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-21 11:10:34,557 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-21 11:10:34,557 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-21 11:10:34,557 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-21 11:10:34,558 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-21 11:10:34,558 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-21 11:10:34,558 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-21 11:10:34,558 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-21 11:10:34,558 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-21 11:10:34,558 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-21 11:10:34,558 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-21 11:10:34,559 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-21 11:10:34,559 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-21 11:10:34,559 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> false [2023-12-21 11:10:34,784 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-21 11:10:34,804 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-21 11:10:34,806 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-21 11:10:34,807 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-21 11:10:34,807 INFO L274 PluginConnector]: CDTParser initialized [2023-12-21 11:10:34,808 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/systemc/kundu.cil.c [2023-12-21 11:10:35,931 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-21 11:10:36,146 INFO L384 CDTParser]: Found 1 translation units. [2023-12-21 11:10:36,147 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/systemc/kundu.cil.c [2023-12-21 11:10:36,157 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f040c28d8/90a53bd048794dd1a378fc56610a0fda/FLAG17be891f9 [2023-12-21 11:10:36,171 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f040c28d8/90a53bd048794dd1a378fc56610a0fda [2023-12-21 11:10:36,173 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-21 11:10:36,175 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-21 11:10:36,177 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-21 11:10:36,177 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-21 11:10:36,181 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-21 11:10:36,181 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 11:10:36" (1/1) ... [2023-12-21 11:10:36,182 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f219580 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:10:36, skipping insertion in model container [2023-12-21 11:10:36,182 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 11:10:36" (1/1) ... [2023-12-21 11:10:36,232 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-21 11:10:36,351 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/systemc/kundu.cil.c[635,648] [2023-12-21 11:10:36,414 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-21 11:10:36,423 INFO L202 MainTranslator]: Completed pre-run [2023-12-21 11:10:36,431 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/systemc/kundu.cil.c[635,648] [2023-12-21 11:10:36,453 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-21 11:10:36,466 INFO L206 MainTranslator]: Completed translation [2023-12-21 11:10:36,466 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:10:36 WrapperNode [2023-12-21 11:10:36,467 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-21 11:10:36,467 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-21 11:10:36,468 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-21 11:10:36,468 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-21 11:10:36,472 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:10:36" (1/1) ... [2023-12-21 11:10:36,480 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:10:36" (1/1) ... [2023-12-21 11:10:36,503 INFO L138 Inliner]: procedures = 34, calls = 40, calls flagged for inlining = 17, calls inlined = 17, statements flattened = 317 [2023-12-21 11:10:36,504 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-21 11:10:36,504 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-21 11:10:36,505 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-21 11:10:36,505 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-21 11:10:36,512 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:10:36" (1/1) ... [2023-12-21 11:10:36,513 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:10:36" (1/1) ... [2023-12-21 11:10:36,515 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:10:36" (1/1) ... [2023-12-21 11:10:36,528 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2023-12-21 11:10:36,528 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:10:36" (1/1) ... [2023-12-21 11:10:36,528 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:10:36" (1/1) ... [2023-12-21 11:10:36,536 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:10:36" (1/1) ... [2023-12-21 11:10:36,567 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:10:36" (1/1) ... [2023-12-21 11:10:36,569 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:10:36" (1/1) ... [2023-12-21 11:10:36,570 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:10:36" (1/1) ... [2023-12-21 11:10:36,573 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-21 11:10:36,573 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-21 11:10:36,573 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-21 11:10:36,573 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-21 11:10:36,574 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:10:36" (1/1) ... [2023-12-21 11:10:36,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-21 11:10:36,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 11:10:36,633 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-12-21 11:10:36,646 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-12-21 11:10:36,659 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-21 11:10:36,659 INFO L130 BoogieDeclarations]: Found specification of procedure write_data [2023-12-21 11:10:36,659 INFO L138 BoogieDeclarations]: Found implementation of procedure write_data [2023-12-21 11:10:36,659 INFO L130 BoogieDeclarations]: Found specification of procedure error [2023-12-21 11:10:36,660 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2023-12-21 11:10:36,660 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2023-12-21 11:10:36,660 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2023-12-21 11:10:36,660 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2023-12-21 11:10:36,660 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2023-12-21 11:10:36,660 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2023-12-21 11:10:36,660 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2023-12-21 11:10:36,660 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2023-12-21 11:10:36,660 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2023-12-21 11:10:36,661 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-21 11:10:36,661 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2023-12-21 11:10:36,661 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2023-12-21 11:10:36,661 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-21 11:10:36,661 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-21 11:10:36,718 INFO L241 CfgBuilder]: Building ICFG [2023-12-21 11:10:36,720 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-21 11:10:37,033 INFO L282 CfgBuilder]: Performing block encoding [2023-12-21 11:10:37,065 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-21 11:10:37,066 INFO L309 CfgBuilder]: Removed 5 assume(true) statements. [2023-12-21 11:10:37,066 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 11:10:37 BoogieIcfgContainer [2023-12-21 11:10:37,066 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-21 11:10:37,068 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-21 11:10:37,068 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-21 11:10:37,071 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-21 11:10:37,071 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 11:10:36" (1/3) ... [2023-12-21 11:10:37,072 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@342cb68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 11:10:37, skipping insertion in model container [2023-12-21 11:10:37,072 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:10:36" (2/3) ... [2023-12-21 11:10:37,072 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@342cb68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 11:10:37, skipping insertion in model container [2023-12-21 11:10:37,072 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 11:10:37" (3/3) ... [2023-12-21 11:10:37,073 INFO L112 eAbstractionObserver]: Analyzing ICFG kundu.cil.c [2023-12-21 11:10:37,085 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-21 11:10:37,085 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-21 11:10:37,126 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-21 11:10:37,132 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;@3f844afa, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-21 11:10:37,132 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-21 11:10:37,136 INFO L276 IsEmpty]: Start isEmpty. Operand has 123 states, 96 states have (on average 1.5833333333333333) internal successors, (152), 100 states have internal predecessors, (152), 18 states have call successors, (18), 7 states have call predecessors, (18), 7 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2023-12-21 11:10:37,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-12-21 11:10:37,146 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 11:10:37,150 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] [2023-12-21 11:10:37,150 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 11:10:37,155 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 11:10:37,155 INFO L85 PathProgramCache]: Analyzing trace with hash 1531733126, now seen corresponding path program 1 times [2023-12-21 11:10:37,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 11:10:37,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105676644] [2023-12-21 11:10:37,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:10:37,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 11:10:37,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:10:37,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-21 11:10:37,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:10:37,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-21 11:10:37,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:10:37,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-12-21 11:10:37,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:10:37,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-12-21 11:10:37,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:10:37,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-12-21 11:10:37,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:10:37,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 11:10:37,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 11:10:37,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105676644] [2023-12-21 11:10:37,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105676644] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 11:10:37,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 11:10:37,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-21 11:10:37,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378435138] [2023-12-21 11:10:37,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 11:10:37,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-21 11:10:37,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 11:10:37,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-21 11:10:37,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-21 11:10:37,516 INFO L87 Difference]: Start difference. First operand has 123 states, 96 states have (on average 1.5833333333333333) internal successors, (152), 100 states have internal predecessors, (152), 18 states have call successors, (18), 7 states have call predecessors, (18), 7 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-21 11:10:37,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 11:10:37,748 INFO L93 Difference]: Finished difference Result 256 states and 398 transitions. [2023-12-21 11:10:37,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-21 11:10:37,751 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 52 [2023-12-21 11:10:37,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 11:10:37,759 INFO L225 Difference]: With dead ends: 256 [2023-12-21 11:10:37,759 INFO L226 Difference]: Without dead ends: 135 [2023-12-21 11:10:37,762 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-21 11:10:37,765 INFO L413 NwaCegarLoop]: 172 mSDtfsCounter, 208 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-21 11:10:37,766 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [218 Valid, 262 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-21 11:10:37,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2023-12-21 11:10:37,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 119. [2023-12-21 11:10:37,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 94 states have (on average 1.4893617021276595) internal successors, (140), 97 states have internal predecessors, (140), 18 states have call successors, (18), 7 states have call predecessors, (18), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2023-12-21 11:10:37,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 173 transitions. [2023-12-21 11:10:37,827 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 173 transitions. Word has length 52 [2023-12-21 11:10:37,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 11:10:37,827 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 173 transitions. [2023-12-21 11:10:37,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-21 11:10:37,829 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 173 transitions. [2023-12-21 11:10:37,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-12-21 11:10:37,832 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 11:10:37,832 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] [2023-12-21 11:10:37,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-21 11:10:37,832 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 11:10:37,833 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 11:10:37,833 INFO L85 PathProgramCache]: Analyzing trace with hash 1884821508, now seen corresponding path program 1 times [2023-12-21 11:10:37,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 11:10:37,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099179499] [2023-12-21 11:10:37,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:10:37,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 11:10:37,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:10:37,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-21 11:10:37,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:10:37,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-21 11:10:37,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:10:37,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-12-21 11:10:37,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:10:38,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-12-21 11:10:38,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:10:38,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-12-21 11:10:38,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:10:38,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 11:10:38,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 11:10:38,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099179499] [2023-12-21 11:10:38,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099179499] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 11:10:38,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 11:10:38,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-21 11:10:38,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994034608] [2023-12-21 11:10:38,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 11:10:38,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-21 11:10:38,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 11:10:38,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-21 11:10:38,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-21 11:10:38,030 INFO L87 Difference]: Start difference. First operand 119 states and 173 transitions. Second operand has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-21 11:10:38,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 11:10:38,378 INFO L93 Difference]: Finished difference Result 368 states and 542 transitions. [2023-12-21 11:10:38,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-21 11:10:38,379 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 52 [2023-12-21 11:10:38,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 11:10:38,386 INFO L225 Difference]: With dead ends: 368 [2023-12-21 11:10:38,386 INFO L226 Difference]: Without dead ends: 258 [2023-12-21 11:10:38,390 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-12-21 11:10:38,392 INFO L413 NwaCegarLoop]: 314 mSDtfsCounter, 370 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 387 SdHoareTripleChecker+Valid, 730 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-21 11:10:38,393 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [387 Valid, 730 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-21 11:10:38,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2023-12-21 11:10:38,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 220. [2023-12-21 11:10:38,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 178 states have (on average 1.4775280898876404) internal successors, (263), 182 states have internal predecessors, (263), 29 states have call successors, (29), 13 states have call predecessors, (29), 12 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) [2023-12-21 11:10:38,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 318 transitions. [2023-12-21 11:10:38,434 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 318 transitions. Word has length 52 [2023-12-21 11:10:38,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 11:10:38,434 INFO L495 AbstractCegarLoop]: Abstraction has 220 states and 318 transitions. [2023-12-21 11:10:38,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-21 11:10:38,435 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 318 transitions. [2023-12-21 11:10:38,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-12-21 11:10:38,441 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 11:10:38,442 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] [2023-12-21 11:10:38,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-21 11:10:38,442 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 11:10:38,443 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 11:10:38,444 INFO L85 PathProgramCache]: Analyzing trace with hash -1886825117, now seen corresponding path program 1 times [2023-12-21 11:10:38,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 11:10:38,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993807551] [2023-12-21 11:10:38,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:10:38,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 11:10:38,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:10:38,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-21 11:10:38,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:10:38,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-21 11:10:38,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:10:38,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-12-21 11:10:38,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:10:38,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-12-21 11:10:38,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:10:38,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-12-21 11:10:38,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:10:38,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 11:10:38,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 11:10:38,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993807551] [2023-12-21 11:10:38,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993807551] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 11:10:38,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 11:10:38,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-21 11:10:38,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108303466] [2023-12-21 11:10:38,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 11:10:38,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-21 11:10:38,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 11:10:38,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-21 11:10:38,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-21 11:10:38,651 INFO L87 Difference]: Start difference. First operand 220 states and 318 transitions. Second operand has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-21 11:10:38,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 11:10:38,834 INFO L93 Difference]: Finished difference Result 469 states and 693 transitions. [2023-12-21 11:10:38,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-21 11:10:38,834 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 52 [2023-12-21 11:10:38,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 11:10:38,843 INFO L225 Difference]: With dead ends: 469 [2023-12-21 11:10:38,843 INFO L226 Difference]: Without dead ends: 258 [2023-12-21 11:10:38,846 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-12-21 11:10:38,849 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 74 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-21 11:10:38,850 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 550 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-21 11:10:38,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2023-12-21 11:10:38,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 222. [2023-12-21 11:10:38,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 180 states have (on average 1.4666666666666666) internal successors, (264), 184 states have internal predecessors, (264), 29 states have call successors, (29), 13 states have call predecessors, (29), 12 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) [2023-12-21 11:10:38,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 319 transitions. [2023-12-21 11:10:38,874 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 319 transitions. Word has length 52 [2023-12-21 11:10:38,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 11:10:38,875 INFO L495 AbstractCegarLoop]: Abstraction has 222 states and 319 transitions. [2023-12-21 11:10:38,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-21 11:10:38,875 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 319 transitions. [2023-12-21 11:10:38,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-12-21 11:10:38,876 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 11:10:38,876 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] [2023-12-21 11:10:38,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-21 11:10:38,876 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 11:10:38,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 11:10:38,877 INFO L85 PathProgramCache]: Analyzing trace with hash 1564136677, now seen corresponding path program 1 times [2023-12-21 11:10:38,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 11:10:38,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286421218] [2023-12-21 11:10:38,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:10:38,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 11:10:38,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:10:38,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-21 11:10:38,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:10:38,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-21 11:10:38,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:10:38,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-12-21 11:10:38,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:10:38,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-12-21 11:10:38,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:10:38,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-12-21 11:10:38,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:10:38,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 11:10:39,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 11:10:39,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286421218] [2023-12-21 11:10:39,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286421218] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 11:10:39,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 11:10:39,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-21 11:10:39,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500866778] [2023-12-21 11:10:39,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 11:10:39,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-21 11:10:39,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 11:10:39,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-21 11:10:39,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-21 11:10:39,002 INFO L87 Difference]: Start difference. First operand 222 states and 319 transitions. Second operand has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 5 states have internal predecessors, (40), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-21 11:10:39,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 11:10:39,524 INFO L93 Difference]: Finished difference Result 919 states and 1359 transitions. [2023-12-21 11:10:39,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-21 11:10:39,525 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 5 states have internal predecessors, (40), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 52 [2023-12-21 11:10:39,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 11:10:39,531 INFO L225 Difference]: With dead ends: 919 [2023-12-21 11:10:39,531 INFO L226 Difference]: Without dead ends: 706 [2023-12-21 11:10:39,533 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2023-12-21 11:10:39,538 INFO L413 NwaCegarLoop]: 289 mSDtfsCounter, 684 mSDsluCounter, 607 mSDsCounter, 0 mSdLazyCounter, 453 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 701 SdHoareTripleChecker+Valid, 896 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-21 11:10:39,539 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [701 Valid, 896 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 453 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-21 11:10:39,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 706 states. [2023-12-21 11:10:39,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 706 to 417. [2023-12-21 11:10:39,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 341 states have (on average 1.4545454545454546) internal successors, (496), 347 states have internal predecessors, (496), 51 states have call successors, (51), 25 states have call predecessors, (51), 24 states have return successors, (51), 45 states have call predecessors, (51), 48 states have call successors, (51) [2023-12-21 11:10:39,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 598 transitions. [2023-12-21 11:10:39,613 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 598 transitions. Word has length 52 [2023-12-21 11:10:39,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 11:10:39,614 INFO L495 AbstractCegarLoop]: Abstraction has 417 states and 598 transitions. [2023-12-21 11:10:39,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 5 states have internal predecessors, (40), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-21 11:10:39,614 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 598 transitions. [2023-12-21 11:10:39,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-12-21 11:10:39,614 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 11:10:39,615 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 11:10:39,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-21 11:10:39,615 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 11:10:39,615 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 11:10:39,615 INFO L85 PathProgramCache]: Analyzing trace with hash 269686940, now seen corresponding path program 1 times [2023-12-21 11:10:39,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 11:10:39,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563768323] [2023-12-21 11:10:39,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:10:39,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 11:10:39,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:10:39,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-21 11:10:39,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:10:39,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-21 11:10:39,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:10:39,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-12-21 11:10:39,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:10:39,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-12-21 11:10:39,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:10:39,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-12-21 11:10:39,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:10:39,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 11:10:39,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 11:10:39,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563768323] [2023-12-21 11:10:39,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563768323] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 11:10:39,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 11:10:39,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-21 11:10:39,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046578255] [2023-12-21 11:10:39,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 11:10:39,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-21 11:10:39,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 11:10:39,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-21 11:10:39,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-21 11:10:39,682 INFO L87 Difference]: Start difference. First operand 417 states and 598 transitions. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-21 11:10:39,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 11:10:39,845 INFO L93 Difference]: Finished difference Result 896 states and 1324 transitions. [2023-12-21 11:10:39,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-21 11:10:39,846 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 53 [2023-12-21 11:10:39,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 11:10:39,850 INFO L225 Difference]: With dead ends: 896 [2023-12-21 11:10:39,850 INFO L226 Difference]: Without dead ends: 488 [2023-12-21 11:10:39,851 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-12-21 11:10:39,852 INFO L413 NwaCegarLoop]: 154 mSDtfsCounter, 76 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 527 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-21 11:10:39,852 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 527 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-21 11:10:39,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2023-12-21 11:10:39,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 425. [2023-12-21 11:10:39,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 349 states have (on average 1.4441260744985673) internal successors, (504), 355 states have internal predecessors, (504), 51 states have call successors, (51), 25 states have call predecessors, (51), 24 states have return successors, (51), 45 states have call predecessors, (51), 48 states have call successors, (51) [2023-12-21 11:10:39,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 606 transitions. [2023-12-21 11:10:39,890 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 606 transitions. Word has length 53 [2023-12-21 11:10:39,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 11:10:39,890 INFO L495 AbstractCegarLoop]: Abstraction has 425 states and 606 transitions. [2023-12-21 11:10:39,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-21 11:10:39,890 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 606 transitions. [2023-12-21 11:10:39,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-12-21 11:10:39,892 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 11:10:39,892 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 11:10:39,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-21 11:10:39,892 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 11:10:39,892 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 11:10:39,893 INFO L85 PathProgramCache]: Analyzing trace with hash 971286814, now seen corresponding path program 1 times [2023-12-21 11:10:39,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 11:10:39,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778742413] [2023-12-21 11:10:39,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:10:39,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 11:10:39,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:10:39,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-21 11:10:39,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:10:39,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-21 11:10:39,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:10:39,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-12-21 11:10:39,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:10:40,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-12-21 11:10:40,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:10:40,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-12-21 11:10:40,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:10:40,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 11:10:40,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 11:10:40,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778742413] [2023-12-21 11:10:40,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778742413] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 11:10:40,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 11:10:40,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-21 11:10:40,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56792292] [2023-12-21 11:10:40,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 11:10:40,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-21 11:10:40,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 11:10:40,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-21 11:10:40,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-21 11:10:40,009 INFO L87 Difference]: Start difference. First operand 425 states and 606 transitions. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-21 11:10:40,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 11:10:40,166 INFO L93 Difference]: Finished difference Result 912 states and 1338 transitions. [2023-12-21 11:10:40,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-21 11:10:40,167 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 53 [2023-12-21 11:10:40,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 11:10:40,169 INFO L225 Difference]: With dead ends: 912 [2023-12-21 11:10:40,169 INFO L226 Difference]: Without dead ends: 496 [2023-12-21 11:10:40,170 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-12-21 11:10:40,171 INFO L413 NwaCegarLoop]: 153 mSDtfsCounter, 54 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 519 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-21 11:10:40,171 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 519 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-21 11:10:40,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2023-12-21 11:10:40,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 433. [2023-12-21 11:10:40,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 357 states have (on average 1.4341736694677871) internal successors, (512), 363 states have internal predecessors, (512), 51 states have call successors, (51), 25 states have call predecessors, (51), 24 states have return successors, (51), 45 states have call predecessors, (51), 48 states have call successors, (51) [2023-12-21 11:10:40,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 614 transitions. [2023-12-21 11:10:40,200 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 614 transitions. Word has length 53 [2023-12-21 11:10:40,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 11:10:40,201 INFO L495 AbstractCegarLoop]: Abstraction has 433 states and 614 transitions. [2023-12-21 11:10:40,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-21 11:10:40,201 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 614 transitions. [2023-12-21 11:10:40,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-12-21 11:10:40,201 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 11:10:40,202 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 11:10:40,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-12-21 11:10:40,202 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 11:10:40,202 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 11:10:40,202 INFO L85 PathProgramCache]: Analyzing trace with hash 1111835424, now seen corresponding path program 1 times [2023-12-21 11:10:40,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 11:10:40,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388959102] [2023-12-21 11:10:40,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:10:40,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 11:10:40,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:10:40,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-21 11:10:40,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:10:40,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-21 11:10:40,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:10:40,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-12-21 11:10:40,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:10:40,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-12-21 11:10:40,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:10:40,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-12-21 11:10:40,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:10:40,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 11:10:40,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 11:10:40,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388959102] [2023-12-21 11:10:40,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388959102] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 11:10:40,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 11:10:40,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-21 11:10:40,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307859399] [2023-12-21 11:10:40,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 11:10:40,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-21 11:10:40,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 11:10:40,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-21 11:10:40,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-21 11:10:40,263 INFO L87 Difference]: Start difference. First operand 433 states and 614 transitions. Second operand has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-12-21 11:10:40,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 11:10:40,524 INFO L93 Difference]: Finished difference Result 1357 states and 1939 transitions. [2023-12-21 11:10:40,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-21 11:10:40,525 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 53 [2023-12-21 11:10:40,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 11:10:40,529 INFO L225 Difference]: With dead ends: 1357 [2023-12-21 11:10:40,529 INFO L226 Difference]: Without dead ends: 934 [2023-12-21 11:10:40,530 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2023-12-21 11:10:40,531 INFO L413 NwaCegarLoop]: 171 mSDtfsCounter, 237 mSDsluCounter, 567 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 738 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-21 11:10:40,531 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [244 Valid, 738 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-21 11:10:40,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 934 states. [2023-12-21 11:10:40,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 934 to 808. [2023-12-21 11:10:40,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 808 states, 668 states have (on average 1.4251497005988023) internal successors, (952), 682 states have internal predecessors, (952), 91 states have call successors, (91), 49 states have call predecessors, (91), 48 states have return successors, (93), 77 states have call predecessors, (93), 88 states have call successors, (93) [2023-12-21 11:10:40,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 808 states to 808 states and 1136 transitions. [2023-12-21 11:10:40,590 INFO L78 Accepts]: Start accepts. Automaton has 808 states and 1136 transitions. Word has length 53 [2023-12-21 11:10:40,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 11:10:40,591 INFO L495 AbstractCegarLoop]: Abstraction has 808 states and 1136 transitions. [2023-12-21 11:10:40,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-12-21 11:10:40,591 INFO L276 IsEmpty]: Start isEmpty. Operand 808 states and 1136 transitions. [2023-12-21 11:10:40,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-12-21 11:10:40,592 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 11:10:40,592 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-21 11:10:40,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-12-21 11:10:40,592 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 11:10:40,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 11:10:40,593 INFO L85 PathProgramCache]: Analyzing trace with hash -2095343432, now seen corresponding path program 1 times [2023-12-21 11:10:40,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 11:10:40,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774852547] [2023-12-21 11:10:40,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:10:40,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 11:10:40,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:10:40,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-21 11:10:40,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:10:40,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-21 11:10:40,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:10:40,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-12-21 11:10:40,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:10:40,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-12-21 11:10:40,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:10:40,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-12-21 11:10:40,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:10:40,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2023-12-21 11:10:40,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:10:40,685 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 11:10:40,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 11:10:40,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774852547] [2023-12-21 11:10:40,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774852547] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 11:10:40,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386668985] [2023-12-21 11:10:40,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:10:40,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 11:10:40,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 11:10:40,692 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 11:10:40,700 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-21 11:10:40,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:10:40,789 INFO L262 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-21 11:10:40,794 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 11:10:40,896 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 11:10:40,897 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 11:10:40,984 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 11:10:40,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386668985] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-21 11:10:40,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-21 11:10:40,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8, 5] total 8 [2023-12-21 11:10:40,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060649869] [2023-12-21 11:10:40,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 11:10:40,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-21 11:10:40,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 11:10:40,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-21 11:10:40,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-12-21 11:10:40,986 INFO L87 Difference]: Start difference. First operand 808 states and 1136 transitions. Second operand has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-12-21 11:10:41,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 11:10:41,228 INFO L93 Difference]: Finished difference Result 2246 states and 3176 transitions. [2023-12-21 11:10:41,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-21 11:10:41,228 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 64 [2023-12-21 11:10:41,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 11:10:41,235 INFO L225 Difference]: With dead ends: 2246 [2023-12-21 11:10:41,236 INFO L226 Difference]: Without dead ends: 1539 [2023-12-21 11:10:41,238 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-12-21 11:10:41,239 INFO L413 NwaCegarLoop]: 291 mSDtfsCounter, 281 mSDsluCounter, 862 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 1153 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-21 11:10:41,239 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [283 Valid, 1153 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-21 11:10:41,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1539 states. [2023-12-21 11:10:41,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1539 to 1510. [2023-12-21 11:10:41,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1510 states, 1254 states have (on average 1.4218500797448166) internal successors, (1783), 1277 states have internal predecessors, (1783), 165 states have call successors, (165), 91 states have call predecessors, (165), 90 states have return successors, (172), 142 states have call predecessors, (172), 162 states have call successors, (172) [2023-12-21 11:10:41,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1510 states to 1510 states and 2120 transitions. [2023-12-21 11:10:41,348 INFO L78 Accepts]: Start accepts. Automaton has 1510 states and 2120 transitions. Word has length 64 [2023-12-21 11:10:41,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 11:10:41,349 INFO L495 AbstractCegarLoop]: Abstraction has 1510 states and 2120 transitions. [2023-12-21 11:10:41,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-12-21 11:10:41,349 INFO L276 IsEmpty]: Start isEmpty. Operand 1510 states and 2120 transitions. [2023-12-21 11:10:41,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-12-21 11:10:41,350 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 11:10:41,350 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 11:10:41,359 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-12-21 11:10:41,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 11:10:41,556 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 11:10:41,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 11:10:41,556 INFO L85 PathProgramCache]: Analyzing trace with hash -850655386, now seen corresponding path program 1 times [2023-12-21 11:10:41,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 11:10:41,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706170446] [2023-12-21 11:10:41,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:10:41,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 11:10:41,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:10:41,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-21 11:10:41,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:10:41,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-21 11:10:41,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:10:41,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-12-21 11:10:41,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:10:41,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-12-21 11:10:41,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:10:41,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-12-21 11:10:41,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:10:41,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2023-12-21 11:10:41,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:10:41,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 11:10:41,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 11:10:41,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706170446] [2023-12-21 11:10:41,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706170446] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 11:10:41,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 11:10:41,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-21 11:10:41,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738540170] [2023-12-21 11:10:41,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 11:10:41,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-21 11:10:41,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 11:10:41,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-21 11:10:41,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-21 11:10:41,642 INFO L87 Difference]: Start difference. First operand 1510 states and 2120 transitions. Second operand has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 4 states have internal predecessors, (53), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-21 11:10:42,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 11:10:42,192 INFO L93 Difference]: Finished difference Result 4752 states and 6781 transitions. [2023-12-21 11:10:42,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-21 11:10:42,193 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 4 states have internal predecessors, (53), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 66 [2023-12-21 11:10:42,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 11:10:42,210 INFO L225 Difference]: With dead ends: 4752 [2023-12-21 11:10:42,210 INFO L226 Difference]: Without dead ends: 3252 [2023-12-21 11:10:42,215 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2023-12-21 11:10:42,217 INFO L413 NwaCegarLoop]: 174 mSDtfsCounter, 352 mSDsluCounter, 458 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 357 SdHoareTripleChecker+Valid, 632 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-21 11:10:42,217 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [357 Valid, 632 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 392 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-21 11:10:42,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3252 states. [2023-12-21 11:10:42,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3252 to 2964. [2023-12-21 11:10:42,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2964 states, 2487 states have (on average 1.403297145154805) internal successors, (3490), 2528 states have internal predecessors, (3490), 292 states have call successors, (292), 170 states have call predecessors, (292), 184 states have return successors, (401), 267 states have call predecessors, (401), 289 states have call successors, (401) [2023-12-21 11:10:42,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2964 states to 2964 states and 4183 transitions. [2023-12-21 11:10:42,425 INFO L78 Accepts]: Start accepts. Automaton has 2964 states and 4183 transitions. Word has length 66 [2023-12-21 11:10:42,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 11:10:42,425 INFO L495 AbstractCegarLoop]: Abstraction has 2964 states and 4183 transitions. [2023-12-21 11:10:42,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 4 states have internal predecessors, (53), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-21 11:10:42,426 INFO L276 IsEmpty]: Start isEmpty. Operand 2964 states and 4183 transitions. [2023-12-21 11:10:42,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-12-21 11:10:42,427 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 11:10:42,427 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 11:10:42,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-12-21 11:10:42,427 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 11:10:42,428 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 11:10:42,429 INFO L85 PathProgramCache]: Analyzing trace with hash -648831452, now seen corresponding path program 1 times [2023-12-21 11:10:42,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 11:10:42,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165337891] [2023-12-21 11:10:42,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:10:42,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 11:10:42,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:10:42,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-21 11:10:42,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:10:42,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-21 11:10:42,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:10:42,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-12-21 11:10:42,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:10:42,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-12-21 11:10:42,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:10:42,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-12-21 11:10:42,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:10:42,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2023-12-21 11:10:42,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:10:42,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 11:10:42,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 11:10:42,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165337891] [2023-12-21 11:10:42,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165337891] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 11:10:42,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 11:10:42,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-21 11:10:42,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647488554] [2023-12-21 11:10:42,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 11:10:42,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-21 11:10:42,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 11:10:42,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-21 11:10:42,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-21 11:10:42,477 INFO L87 Difference]: Start difference. First operand 2964 states and 4183 transitions. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 3 states have internal predecessors, (53), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-21 11:10:42,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 11:10:42,816 INFO L93 Difference]: Finished difference Result 6225 states and 8823 transitions. [2023-12-21 11:10:42,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-21 11:10:42,817 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 3 states have internal predecessors, (53), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 66 [2023-12-21 11:10:42,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 11:10:42,831 INFO L225 Difference]: With dead ends: 6225 [2023-12-21 11:10:42,831 INFO L226 Difference]: Without dead ends: 3270 [2023-12-21 11:10:42,838 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-12-21 11:10:42,839 INFO L413 NwaCegarLoop]: 118 mSDtfsCounter, 287 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-21 11:10:42,839 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [303 Valid, 266 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-21 11:10:42,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3270 states. [2023-12-21 11:10:42,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3270 to 2959. [2023-12-21 11:10:42,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2959 states, 2485 states have (on average 1.4028169014084506) internal successors, (3486), 2525 states have internal predecessors, (3486), 289 states have call successors, (289), 170 states have call predecessors, (289), 184 states have return successors, (397), 264 states have call predecessors, (397), 286 states have call successors, (397) [2023-12-21 11:10:43,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2959 states to 2959 states and 4172 transitions. [2023-12-21 11:10:43,003 INFO L78 Accepts]: Start accepts. Automaton has 2959 states and 4172 transitions. Word has length 66 [2023-12-21 11:10:43,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 11:10:43,003 INFO L495 AbstractCegarLoop]: Abstraction has 2959 states and 4172 transitions. [2023-12-21 11:10:43,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 3 states have internal predecessors, (53), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-21 11:10:43,003 INFO L276 IsEmpty]: Start isEmpty. Operand 2959 states and 4172 transitions. [2023-12-21 11:10:43,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-12-21 11:10:43,004 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 11:10:43,004 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 11:10:43,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-12-21 11:10:43,005 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 11:10:43,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 11:10:43,005 INFO L85 PathProgramCache]: Analyzing trace with hash 1187424253, now seen corresponding path program 1 times [2023-12-21 11:10:43,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 11:10:43,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505578025] [2023-12-21 11:10:43,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:10:43,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 11:10:43,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:10:43,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-21 11:10:43,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:10:43,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-21 11:10:43,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:10:43,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-12-21 11:10:43,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:10:43,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-12-21 11:10:43,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:10:43,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-12-21 11:10:43,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:10:43,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2023-12-21 11:10:43,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:10:43,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 11:10:43,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 11:10:43,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505578025] [2023-12-21 11:10:43,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505578025] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 11:10:43,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 11:10:43,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-21 11:10:43,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898671231] [2023-12-21 11:10:43,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 11:10:43,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-21 11:10:43,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 11:10:43,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-21 11:10:43,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-21 11:10:43,053 INFO L87 Difference]: Start difference. First operand 2959 states and 4172 transitions. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-12-21 11:10:43,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 11:10:43,536 INFO L93 Difference]: Finished difference Result 8563 states and 12186 transitions. [2023-12-21 11:10:43,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-21 11:10:43,537 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 67 [2023-12-21 11:10:43,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 11:10:43,560 INFO L225 Difference]: With dead ends: 8563 [2023-12-21 11:10:43,560 INFO L226 Difference]: Without dead ends: 5613 [2023-12-21 11:10:43,568 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-12-21 11:10:43,569 INFO L413 NwaCegarLoop]: 148 mSDtfsCounter, 349 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 361 SdHoareTripleChecker+Valid, 420 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-21 11:10:43,569 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [361 Valid, 420 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-21 11:10:43,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5613 states. [2023-12-21 11:10:43,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5613 to 4678. [2023-12-21 11:10:43,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4678 states, 3895 states have (on average 1.3650834403080874) internal successors, (5317), 3959 states have internal predecessors, (5317), 475 states have call successors, (475), 283 states have call predecessors, (475), 307 states have return successors, (665), 436 states have call predecessors, (665), 472 states have call successors, (665) [2023-12-21 11:10:43,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4678 states to 4678 states and 6457 transitions. [2023-12-21 11:10:43,891 INFO L78 Accepts]: Start accepts. Automaton has 4678 states and 6457 transitions. Word has length 67 [2023-12-21 11:10:43,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 11:10:43,893 INFO L495 AbstractCegarLoop]: Abstraction has 4678 states and 6457 transitions. [2023-12-21 11:10:43,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-12-21 11:10:43,893 INFO L276 IsEmpty]: Start isEmpty. Operand 4678 states and 6457 transitions. [2023-12-21 11:10:43,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-12-21 11:10:43,894 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 11:10:43,894 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 11:10:43,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-12-21 11:10:43,895 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 11:10:43,895 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 11:10:43,895 INFO L85 PathProgramCache]: Analyzing trace with hash -588871477, now seen corresponding path program 1 times [2023-12-21 11:10:43,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 11:10:43,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947471696] [2023-12-21 11:10:43,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:10:43,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 11:10:43,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:10:43,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-21 11:10:43,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:10:43,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-21 11:10:43,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:10:43,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-12-21 11:10:43,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:10:43,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-12-21 11:10:43,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:10:43,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-12-21 11:10:43,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:10:43,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2023-12-21 11:10:43,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:10:43,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 11:10:43,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 11:10:43,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947471696] [2023-12-21 11:10:43,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947471696] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 11:10:43,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 11:10:43,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-12-21 11:10:43,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597558954] [2023-12-21 11:10:43,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 11:10:43,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-21 11:10:43,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 11:10:43,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-21 11:10:43,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-12-21 11:10:43,996 INFO L87 Difference]: Start difference. First operand 4678 states and 6457 transitions. Second operand has 8 states, 8 states have (on average 6.875) internal successors, (55), 6 states have internal predecessors, (55), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-12-21 11:10:44,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 11:10:44,847 INFO L93 Difference]: Finished difference Result 12165 states and 16847 transitions. [2023-12-21 11:10:44,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-12-21 11:10:44,847 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 6 states have internal predecessors, (55), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 68 [2023-12-21 11:10:44,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 11:10:44,931 INFO L225 Difference]: With dead ends: 12165 [2023-12-21 11:10:44,931 INFO L226 Difference]: Without dead ends: 7658 [2023-12-21 11:10:44,942 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2023-12-21 11:10:44,943 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 698 mSDsluCounter, 446 mSDsCounter, 0 mSdLazyCounter, 564 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 718 SdHoareTripleChecker+Valid, 557 SdHoareTripleChecker+Invalid, 675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-21 11:10:44,943 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [718 Valid, 557 Invalid, 675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 564 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-21 11:10:44,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7658 states. [2023-12-21 11:10:45,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7658 to 6864. [2023-12-21 11:10:45,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6864 states, 5729 states have (on average 1.3655088148018852) internal successors, (7823), 5809 states have internal predecessors, (7823), 687 states have call successors, (687), 411 states have call predecessors, (687), 447 states have return successors, (971), 644 states have call predecessors, (971), 684 states have call successors, (971) [2023-12-21 11:10:45,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6864 states to 6864 states and 9481 transitions. [2023-12-21 11:10:45,349 INFO L78 Accepts]: Start accepts. Automaton has 6864 states and 9481 transitions. Word has length 68 [2023-12-21 11:10:45,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 11:10:45,349 INFO L495 AbstractCegarLoop]: Abstraction has 6864 states and 9481 transitions. [2023-12-21 11:10:45,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 6 states have internal predecessors, (55), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-12-21 11:10:45,350 INFO L276 IsEmpty]: Start isEmpty. Operand 6864 states and 9481 transitions. [2023-12-21 11:10:45,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-12-21 11:10:45,352 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 11:10:45,352 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 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] [2023-12-21 11:10:45,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-12-21 11:10:45,352 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 11:10:45,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 11:10:45,353 INFO L85 PathProgramCache]: Analyzing trace with hash -421261476, now seen corresponding path program 1 times [2023-12-21 11:10:45,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 11:10:45,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887091904] [2023-12-21 11:10:45,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:10:45,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 11:10:45,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:10:45,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-21 11:10:45,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:10:45,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-21 11:10:45,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:10:45,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-12-21 11:10:45,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:10:45,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-12-21 11:10:45,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:10:45,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-12-21 11:10:45,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:10:45,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-12-21 11:10:45,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:10:45,428 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-21 11:10:45,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 11:10:45,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887091904] [2023-12-21 11:10:45,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887091904] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 11:10:45,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225176065] [2023-12-21 11:10:45,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:10:45,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 11:10:45,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 11:10:45,430 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 11:10:45,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-21 11:10:45,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:10:45,502 INFO L262 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-21 11:10:45,504 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 11:10:45,528 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 11:10:45,528 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-21 11:10:45,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225176065] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 11:10:45,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-21 11:10:45,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-12-21 11:10:45,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472465158] [2023-12-21 11:10:45,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 11:10:45,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-21 11:10:45,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 11:10:45,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-21 11:10:45,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-21 11:10:45,530 INFO L87 Difference]: Start difference. First operand 6864 states and 9481 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-21 11:10:46,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 11:10:46,189 INFO L93 Difference]: Finished difference Result 18019 states and 25163 transitions. [2023-12-21 11:10:46,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-21 11:10:46,190 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 71 [2023-12-21 11:10:46,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 11:10:46,242 INFO L225 Difference]: With dead ends: 18019 [2023-12-21 11:10:46,243 INFO L226 Difference]: Without dead ends: 11165 [2023-12-21 11:10:46,260 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-21 11:10:46,261 INFO L413 NwaCegarLoop]: 282 mSDtfsCounter, 125 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 11:10:46,261 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 437 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 11:10:46,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11165 states. [2023-12-21 11:10:46,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11165 to 10643. [2023-12-21 11:10:46,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10643 states, 8830 states have (on average 1.3558323895809739) internal successors, (11972), 8960 states have internal predecessors, (11972), 1097 states have call successors, (1097), 657 states have call predecessors, (1097), 715 states have return successors, (1717), 1027 states have call predecessors, (1717), 1094 states have call successors, (1717) [2023-12-21 11:10:46,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10643 states to 10643 states and 14786 transitions. [2023-12-21 11:10:46,877 INFO L78 Accepts]: Start accepts. Automaton has 10643 states and 14786 transitions. Word has length 71 [2023-12-21 11:10:46,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 11:10:46,877 INFO L495 AbstractCegarLoop]: Abstraction has 10643 states and 14786 transitions. [2023-12-21 11:10:46,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-21 11:10:46,878 INFO L276 IsEmpty]: Start isEmpty. Operand 10643 states and 14786 transitions. [2023-12-21 11:10:46,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-12-21 11:10:46,881 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 11:10:46,881 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 11:10:46,891 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-21 11:10:47,087 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,SelfDestructingSolverStorable12 [2023-12-21 11:10:47,089 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 11:10:47,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 11:10:47,089 INFO L85 PathProgramCache]: Analyzing trace with hash -1122212262, now seen corresponding path program 1 times [2023-12-21 11:10:47,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 11:10:47,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542626160] [2023-12-21 11:10:47,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:10:47,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 11:10:47,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:10:47,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-21 11:10:47,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:10:47,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-21 11:10:47,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:10:47,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-12-21 11:10:47,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:10:47,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-12-21 11:10:47,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:10:47,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-12-21 11:10:47,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:10:47,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2023-12-21 11:10:47,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:10:47,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2023-12-21 11:10:47,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:10:47,183 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-21 11:10:47,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 11:10:47,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542626160] [2023-12-21 11:10:47,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542626160] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 11:10:47,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 11:10:47,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-21 11:10:47,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586338855] [2023-12-21 11:10:47,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 11:10:47,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-21 11:10:47,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 11:10:47,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-21 11:10:47,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-21 11:10:47,187 INFO L87 Difference]: Start difference. First operand 10643 states and 14786 transitions. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 5 states have internal predecessors, (60), 3 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-21 11:10:48,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 11:10:48,703 INFO L93 Difference]: Finished difference Result 26618 states and 37192 transitions. [2023-12-21 11:10:48,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-12-21 11:10:48,704 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 5 states have internal predecessors, (60), 3 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 77 [2023-12-21 11:10:48,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 11:10:48,765 INFO L225 Difference]: With dead ends: 26618 [2023-12-21 11:10:48,765 INFO L226 Difference]: Without dead ends: 17340 [2023-12-21 11:10:48,795 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2023-12-21 11:10:48,796 INFO L413 NwaCegarLoop]: 284 mSDtfsCounter, 740 mSDsluCounter, 768 mSDsCounter, 0 mSdLazyCounter, 907 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 772 SdHoareTripleChecker+Valid, 1052 SdHoareTripleChecker+Invalid, 987 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 907 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-21 11:10:48,796 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [772 Valid, 1052 Invalid, 987 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 907 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-21 11:10:48,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17340 states. [2023-12-21 11:10:49,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17340 to 14611. [2023-12-21 11:10:49,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14611 states, 12202 states have (on average 1.3667431568595312) internal successors, (16677), 12412 states have internal predecessors, (16677), 1425 states have call successors, (1425), 853 states have call predecessors, (1425), 983 states have return successors, (2443), 1347 states have call predecessors, (2443), 1422 states have call successors, (2443) [2023-12-21 11:10:49,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14611 states to 14611 states and 20545 transitions. [2023-12-21 11:10:49,681 INFO L78 Accepts]: Start accepts. Automaton has 14611 states and 20545 transitions. Word has length 77 [2023-12-21 11:10:49,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 11:10:49,681 INFO L495 AbstractCegarLoop]: Abstraction has 14611 states and 20545 transitions. [2023-12-21 11:10:49,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 5 states have internal predecessors, (60), 3 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-21 11:10:49,681 INFO L276 IsEmpty]: Start isEmpty. Operand 14611 states and 20545 transitions. [2023-12-21 11:10:49,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2023-12-21 11:10:49,686 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 11:10:49,686 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1] [2023-12-21 11:10:49,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-12-21 11:10:49,686 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 11:10:49,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 11:10:49,687 INFO L85 PathProgramCache]: Analyzing trace with hash 167760280, now seen corresponding path program 1 times [2023-12-21 11:10:49,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 11:10:49,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531079328] [2023-12-21 11:10:49,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:10:49,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 11:10:49,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:10:49,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-21 11:10:49,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:10:49,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-21 11:10:49,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:10:49,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-12-21 11:10:49,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:10:49,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-12-21 11:10:49,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:10:49,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-12-21 11:10:49,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:10:49,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2023-12-21 11:10:49,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:10:49,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2023-12-21 11:10:49,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:10:49,814 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-21 11:10:49,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 11:10:49,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531079328] [2023-12-21 11:10:49,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531079328] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 11:10:49,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 11:10:49,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-12-21 11:10:49,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027636150] [2023-12-21 11:10:49,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 11:10:49,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-21 11:10:49,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 11:10:49,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-21 11:10:49,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-12-21 11:10:49,816 INFO L87 Difference]: Start difference. First operand 14611 states and 20545 transitions. Second operand has 8 states, 8 states have (on average 7.875) internal successors, (63), 6 states have internal predecessors, (63), 3 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-21 11:10:51,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 11:10:51,732 INFO L93 Difference]: Finished difference Result 38035 states and 53591 transitions. [2023-12-21 11:10:51,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-12-21 11:10:51,732 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.875) internal successors, (63), 6 states have internal predecessors, (63), 3 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 80 [2023-12-21 11:10:51,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 11:10:51,811 INFO L225 Difference]: With dead ends: 38035 [2023-12-21 11:10:51,812 INFO L226 Difference]: Without dead ends: 24789 [2023-12-21 11:10:51,843 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2023-12-21 11:10:51,844 INFO L413 NwaCegarLoop]: 283 mSDtfsCounter, 848 mSDsluCounter, 1037 mSDsCounter, 0 mSdLazyCounter, 1299 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 880 SdHoareTripleChecker+Valid, 1320 SdHoareTripleChecker+Invalid, 1410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 1299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-21 11:10:51,844 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [880 Valid, 1320 Invalid, 1410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 1299 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-21 11:10:51,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24789 states. [2023-12-21 11:10:53,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24789 to 21057. [2023-12-21 11:10:53,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21057 states, 17640 states have (on average 1.373015873015873) internal successors, (24220), 17920 states have internal predecessors, (24220), 2016 states have call successors, (2016), 1207 states have call predecessors, (2016), 1400 states have return successors, (3536), 1931 states have call predecessors, (3536), 2013 states have call successors, (3536) [2023-12-21 11:10:53,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21057 states to 21057 states and 29772 transitions. [2023-12-21 11:10:53,204 INFO L78 Accepts]: Start accepts. Automaton has 21057 states and 29772 transitions. Word has length 80 [2023-12-21 11:10:53,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 11:10:53,205 INFO L495 AbstractCegarLoop]: Abstraction has 21057 states and 29772 transitions. [2023-12-21 11:10:53,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.875) internal successors, (63), 6 states have internal predecessors, (63), 3 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-21 11:10:53,205 INFO L276 IsEmpty]: Start isEmpty. Operand 21057 states and 29772 transitions. [2023-12-21 11:10:53,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-12-21 11:10:53,211 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 11:10:53,211 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 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] [2023-12-21 11:10:53,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-12-21 11:10:53,211 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 11:10:53,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 11:10:53,212 INFO L85 PathProgramCache]: Analyzing trace with hash 1527405945, now seen corresponding path program 1 times [2023-12-21 11:10:53,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 11:10:53,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906317322] [2023-12-21 11:10:53,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:10:53,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 11:10:53,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:10:53,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-21 11:10:53,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:10:53,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-21 11:10:53,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:10:53,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-12-21 11:10:53,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:10:53,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-12-21 11:10:53,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:10:53,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-12-21 11:10:53,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:10:53,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2023-12-21 11:10:53,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:10:53,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2023-12-21 11:10:53,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:10:53,297 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-21 11:10:53,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 11:10:53,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906317322] [2023-12-21 11:10:53,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906317322] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 11:10:53,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 11:10:53,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-21 11:10:53,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005541075] [2023-12-21 11:10:53,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 11:10:53,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-21 11:10:53,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 11:10:53,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-21 11:10:53,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-21 11:10:53,300 INFO L87 Difference]: Start difference. First operand 21057 states and 29772 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2023-12-21 11:10:55,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 11:10:55,545 INFO L93 Difference]: Finished difference Result 64092 states and 92160 transitions. [2023-12-21 11:10:55,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-12-21 11:10:55,546 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 86 [2023-12-21 11:10:55,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 11:10:55,707 INFO L225 Difference]: With dead ends: 64092 [2023-12-21 11:10:55,707 INFO L226 Difference]: Without dead ends: 43049 [2023-12-21 11:10:55,764 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2023-12-21 11:10:55,765 INFO L413 NwaCegarLoop]: 222 mSDtfsCounter, 1085 mSDsluCounter, 668 mSDsCounter, 0 mSdLazyCounter, 665 mSolverCounterSat, 238 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1100 SdHoareTripleChecker+Valid, 890 SdHoareTripleChecker+Invalid, 903 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 238 IncrementalHoareTripleChecker+Valid, 665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-21 11:10:55,765 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1100 Valid, 890 Invalid, 903 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [238 Valid, 665 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-21 11:10:55,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43049 states. [2023-12-21 11:10:57,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43049 to 40539. [2023-12-21 11:10:57,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40539 states, 33832 states have (on average 1.3446145660912745) internal successors, (45491), 34367 states have internal predecessors, (45491), 3900 states have call successors, (3900), 2376 states have call predecessors, (3900), 2806 states have return successors, (7008), 3797 states have call predecessors, (7008), 3897 states have call successors, (7008) [2023-12-21 11:10:57,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40539 states to 40539 states and 56399 transitions. [2023-12-21 11:10:57,913 INFO L78 Accepts]: Start accepts. Automaton has 40539 states and 56399 transitions. Word has length 86 [2023-12-21 11:10:57,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 11:10:57,913 INFO L495 AbstractCegarLoop]: Abstraction has 40539 states and 56399 transitions. [2023-12-21 11:10:57,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2023-12-21 11:10:57,914 INFO L276 IsEmpty]: Start isEmpty. Operand 40539 states and 56399 transitions. [2023-12-21 11:10:57,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-12-21 11:10:57,920 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 11:10:57,920 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, 1, 1, 1, 1] [2023-12-21 11:10:57,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-12-21 11:10:57,920 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 11:10:57,921 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 11:10:57,921 INFO L85 PathProgramCache]: Analyzing trace with hash 253434099, now seen corresponding path program 1 times [2023-12-21 11:10:57,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 11:10:57,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935594729] [2023-12-21 11:10:57,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:10:57,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 11:10:57,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:10:57,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-21 11:10:57,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:10:57,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-21 11:10:57,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:10:58,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-12-21 11:10:58,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:10:58,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-12-21 11:10:58,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:10:58,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-12-21 11:10:58,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:10:58,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2023-12-21 11:10:58,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:10:58,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2023-12-21 11:10:58,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:10:58,017 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-21 11:10:58,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 11:10:58,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935594729] [2023-12-21 11:10:58,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935594729] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 11:10:58,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093012117] [2023-12-21 11:10:58,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:10:58,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 11:10:58,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 11:10:58,019 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 11:10:58,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-21 11:10:58,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:10:58,111 INFO L262 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-21 11:10:58,119 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 11:10:58,218 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 11:10:58,218 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 11:10:58,363 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-21 11:10:58,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093012117] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-21 11:10:58,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-21 11:10:58,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8, 6] total 15 [2023-12-21 11:10:58,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430493265] [2023-12-21 11:10:58,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 11:10:58,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-21 11:10:58,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 11:10:58,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-21 11:10:58,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2023-12-21 11:10:58,365 INFO L87 Difference]: Start difference. First operand 40539 states and 56399 transitions. Second operand has 8 states, 8 states have (on average 8.625) internal successors, (69), 7 states have internal predecessors, (69), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-21 11:11:00,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 11:11:00,251 INFO L93 Difference]: Finished difference Result 43023 states and 59555 transitions. [2023-12-21 11:11:00,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-21 11:11:00,252 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.625) internal successors, (69), 7 states have internal predecessors, (69), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 87 [2023-12-21 11:11:00,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 11:11:00,396 INFO L225 Difference]: With dead ends: 43023 [2023-12-21 11:11:00,396 INFO L226 Difference]: Without dead ends: 43020 [2023-12-21 11:11:00,420 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 180 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2023-12-21 11:11:00,421 INFO L413 NwaCegarLoop]: 182 mSDtfsCounter, 383 mSDsluCounter, 799 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 389 SdHoareTripleChecker+Valid, 981 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-21 11:11:00,421 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [389 Valid, 981 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-21 11:11:00,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43020 states. [2023-12-21 11:11:02,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43020 to 41535. [2023-12-21 11:11:02,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41535 states, 34647 states have (on average 1.3413859785840043) internal successors, (46475), 35200 states have internal predecessors, (46475), 4006 states have call successors, (4006), 2443 states have call predecessors, (4006), 2881 states have return successors, (7155), 3893 states have call predecessors, (7155), 4003 states have call successors, (7155) [2023-12-21 11:11:02,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41535 states to 41535 states and 57636 transitions. [2023-12-21 11:11:02,546 INFO L78 Accepts]: Start accepts. Automaton has 41535 states and 57636 transitions. Word has length 87 [2023-12-21 11:11:02,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 11:11:02,546 INFO L495 AbstractCegarLoop]: Abstraction has 41535 states and 57636 transitions. [2023-12-21 11:11:02,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.625) internal successors, (69), 7 states have internal predecessors, (69), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-21 11:11:02,546 INFO L276 IsEmpty]: Start isEmpty. Operand 41535 states and 57636 transitions. [2023-12-21 11:11:02,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-12-21 11:11:02,568 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 11:11:02,568 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 11:11:02,577 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-21 11:11:02,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 11:11:02,774 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 11:11:02,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 11:11:02,775 INFO L85 PathProgramCache]: Analyzing trace with hash 1399470103, now seen corresponding path program 1 times [2023-12-21 11:11:02,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 11:11:02,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600098170] [2023-12-21 11:11:02,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:11:02,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 11:11:02,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:11:02,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-21 11:11:02,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:11:02,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-21 11:11:02,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:11:02,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-12-21 11:11:02,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:11:02,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-12-21 11:11:02,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:11:02,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-12-21 11:11:02,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:11:02,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2023-12-21 11:11:02,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:11:02,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2023-12-21 11:11:02,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:11:02,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2023-12-21 11:11:02,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:11:02,871 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-21 11:11:02,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 11:11:02,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600098170] [2023-12-21 11:11:02,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600098170] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 11:11:02,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 11:11:02,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-21 11:11:02,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016004760] [2023-12-21 11:11:02,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 11:11:02,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-21 11:11:02,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 11:11:02,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-21 11:11:02,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-21 11:11:02,873 INFO L87 Difference]: Start difference. First operand 41535 states and 57636 transitions. Second operand has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 4 states have internal predecessors, (67), 3 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2023-12-21 11:11:04,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 11:11:04,758 INFO L93 Difference]: Finished difference Result 86391 states and 119808 transitions. [2023-12-21 11:11:04,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-21 11:11:04,758 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 4 states have internal predecessors, (67), 3 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 89 [2023-12-21 11:11:04,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 11:11:04,893 INFO L225 Difference]: With dead ends: 86391 [2023-12-21 11:11:04,893 INFO L226 Difference]: Without dead ends: 44870 [2023-12-21 11:11:04,965 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2023-12-21 11:11:04,965 INFO L413 NwaCegarLoop]: 118 mSDtfsCounter, 396 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 402 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-21 11:11:04,965 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [402 Valid, 388 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-21 11:11:04,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44870 states. [2023-12-21 11:11:06,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44870 to 41479. [2023-12-21 11:11:06,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41479 states, 34479 states have (on average 1.3318541721047594) internal successors, (45921), 35144 states have internal predecessors, (45921), 4006 states have call successors, (4006), 2443 states have call predecessors, (4006), 2993 states have return successors, (6707), 3893 states have call predecessors, (6707), 4003 states have call successors, (6707) [2023-12-21 11:11:06,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41479 states to 41479 states and 56634 transitions. [2023-12-21 11:11:06,869 INFO L78 Accepts]: Start accepts. Automaton has 41479 states and 56634 transitions. Word has length 89 [2023-12-21 11:11:06,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 11:11:06,869 INFO L495 AbstractCegarLoop]: Abstraction has 41479 states and 56634 transitions. [2023-12-21 11:11:06,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 4 states have internal predecessors, (67), 3 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2023-12-21 11:11:06,869 INFO L276 IsEmpty]: Start isEmpty. Operand 41479 states and 56634 transitions. [2023-12-21 11:11:06,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-12-21 11:11:06,875 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 11:11:06,875 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 11:11:06,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-12-21 11:11:06,875 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 11:11:06,875 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 11:11:06,875 INFO L85 PathProgramCache]: Analyzing trace with hash -1328739243, now seen corresponding path program 1 times [2023-12-21 11:11:06,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 11:11:06,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376241994] [2023-12-21 11:11:06,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:11:06,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 11:11:06,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:11:06,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-21 11:11:06,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:11:06,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-21 11:11:06,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:11:06,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-12-21 11:11:06,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:11:06,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-12-21 11:11:06,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:11:06,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-12-21 11:11:06,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:11:06,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2023-12-21 11:11:06,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:11:06,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2023-12-21 11:11:06,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:11:06,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2023-12-21 11:11:06,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:11:06,914 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-21 11:11:06,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 11:11:06,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376241994] [2023-12-21 11:11:06,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376241994] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 11:11:06,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 11:11:06,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-21 11:11:06,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927625838] [2023-12-21 11:11:06,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 11:11:06,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-21 11:11:06,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 11:11:06,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-21 11:11:06,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-21 11:11:06,916 INFO L87 Difference]: Start difference. First operand 41479 states and 56634 transitions. Second operand has 5 states, 5 states have (on average 12.0) internal successors, (60), 3 states have internal predecessors, (60), 2 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-21 11:11:08,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 11:11:08,475 INFO L93 Difference]: Finished difference Result 46943 states and 64319 transitions. [2023-12-21 11:11:08,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-21 11:11:08,476 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 3 states have internal predecessors, (60), 2 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 89 [2023-12-21 11:11:08,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 11:11:08,592 INFO L225 Difference]: With dead ends: 46943 [2023-12-21 11:11:08,592 INFO L226 Difference]: Without dead ends: 44667 [2023-12-21 11:11:08,611 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-12-21 11:11:08,612 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 291 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-21 11:11:08,612 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [307 Valid, 264 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-21 11:11:08,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44667 states. [2023-12-21 11:11:10,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44667 to 41329. [2023-12-21 11:11:10,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41329 states, 34359 states have (on average 1.3321400506417533) internal successors, (45771), 35022 states have internal predecessors, (45771), 3987 states have call successors, (3987), 2433 states have call predecessors, (3987), 2982 states have return successors, (6686), 3874 states have call predecessors, (6686), 3984 states have call successors, (6686) [2023-12-21 11:11:10,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41329 states to 41329 states and 56444 transitions. [2023-12-21 11:11:10,427 INFO L78 Accepts]: Start accepts. Automaton has 41329 states and 56444 transitions. Word has length 89 [2023-12-21 11:11:10,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 11:11:10,427 INFO L495 AbstractCegarLoop]: Abstraction has 41329 states and 56444 transitions. [2023-12-21 11:11:10,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 3 states have internal predecessors, (60), 2 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-21 11:11:10,427 INFO L276 IsEmpty]: Start isEmpty. Operand 41329 states and 56444 transitions. [2023-12-21 11:11:10,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-12-21 11:11:10,432 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 11:11:10,433 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 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] [2023-12-21 11:11:10,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-12-21 11:11:10,433 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 11:11:10,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 11:11:10,433 INFO L85 PathProgramCache]: Analyzing trace with hash 899233760, now seen corresponding path program 1 times [2023-12-21 11:11:10,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 11:11:10,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856713205] [2023-12-21 11:11:10,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:11:10,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 11:11:10,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:11:10,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-21 11:11:10,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:11:10,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-21 11:11:10,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:11:10,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-12-21 11:11:10,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:11:10,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-12-21 11:11:10,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:11:10,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-12-21 11:11:10,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:11:10,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2023-12-21 11:11:10,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:11:10,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2023-12-21 11:11:10,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:11:10,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2023-12-21 11:11:10,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:11:10,493 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-21 11:11:10,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 11:11:10,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856713205] [2023-12-21 11:11:10,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856713205] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 11:11:10,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 11:11:10,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-21 11:11:10,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069067035] [2023-12-21 11:11:10,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 11:11:10,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-21 11:11:10,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 11:11:10,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-21 11:11:10,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-21 11:11:10,495 INFO L87 Difference]: Start difference. First operand 41329 states and 56444 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 4 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2023-12-21 11:11:12,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 11:11:12,766 INFO L93 Difference]: Finished difference Result 85171 states and 116371 transitions. [2023-12-21 11:11:12,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-12-21 11:11:12,767 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 4 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 90 [2023-12-21 11:11:12,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 11:11:12,876 INFO L225 Difference]: With dead ends: 85171 [2023-12-21 11:11:12,876 INFO L226 Difference]: Without dead ends: 43852 [2023-12-21 11:11:12,934 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2023-12-21 11:11:12,936 INFO L413 NwaCegarLoop]: 218 mSDtfsCounter, 1166 mSDsluCounter, 643 mSDsCounter, 0 mSdLazyCounter, 666 mSolverCounterSat, 222 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1181 SdHoareTripleChecker+Valid, 861 SdHoareTripleChecker+Invalid, 888 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 222 IncrementalHoareTripleChecker+Valid, 666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-21 11:11:12,937 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1181 Valid, 861 Invalid, 888 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [222 Valid, 666 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-21 11:11:12,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43852 states. [2023-12-21 11:11:14,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43852 to 41444. [2023-12-21 11:11:14,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41444 states, 34474 states have (on average 1.3232871149271914) internal successors, (45619), 35137 states have internal predecessors, (45619), 3987 states have call successors, (3987), 2433 states have call predecessors, (3987), 2982 states have return successors, (6350), 3874 states have call predecessors, (6350), 3984 states have call successors, (6350) [2023-12-21 11:11:14,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41444 states to 41444 states and 55956 transitions. [2023-12-21 11:11:14,954 INFO L78 Accepts]: Start accepts. Automaton has 41444 states and 55956 transitions. Word has length 90 [2023-12-21 11:11:14,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 11:11:14,954 INFO L495 AbstractCegarLoop]: Abstraction has 41444 states and 55956 transitions. [2023-12-21 11:11:14,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 4 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2023-12-21 11:11:14,954 INFO L276 IsEmpty]: Start isEmpty. Operand 41444 states and 55956 transitions. [2023-12-21 11:11:14,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2023-12-21 11:11:14,964 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 11:11:14,964 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-12-21 11:11:14,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-12-21 11:11:14,964 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 11:11:14,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 11:11:14,964 INFO L85 PathProgramCache]: Analyzing trace with hash 488987476, now seen corresponding path program 1 times [2023-12-21 11:11:14,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 11:11:14,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326189255] [2023-12-21 11:11:14,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:11:14,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 11:11:14,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:11:14,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-21 11:11:14,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:11:14,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-21 11:11:14,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:11:14,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-12-21 11:11:14,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:11:15,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-12-21 11:11:15,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:11:15,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-12-21 11:11:15,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:11:15,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2023-12-21 11:11:15,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:11:15,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2023-12-21 11:11:15,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:11:15,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2023-12-21 11:11:15,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:11:15,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2023-12-21 11:11:15,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:11:15,024 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-12-21 11:11:15,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 11:11:15,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326189255] [2023-12-21 11:11:15,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326189255] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 11:11:15,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 11:11:15,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-21 11:11:15,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453254974] [2023-12-21 11:11:15,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 11:11:15,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-21 11:11:15,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 11:11:15,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-21 11:11:15,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-21 11:11:15,026 INFO L87 Difference]: Start difference. First operand 41444 states and 55956 transitions. Second operand has 5 states, 5 states have (on average 14.0) internal successors, (70), 3 states have internal predecessors, (70), 2 states have call successors, (11), 4 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-12-21 11:11:17,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 11:11:17,907 INFO L93 Difference]: Finished difference Result 111991 states and 152211 transitions. [2023-12-21 11:11:17,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-21 11:11:17,907 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 3 states have internal predecessors, (70), 2 states have call successors, (11), 4 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 109 [2023-12-21 11:11:17,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 11:11:18,067 INFO L225 Difference]: With dead ends: 111991 [2023-12-21 11:11:18,067 INFO L226 Difference]: Without dead ends: 71557 [2023-12-21 11:11:18,121 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-12-21 11:11:18,122 INFO L413 NwaCegarLoop]: 142 mSDtfsCounter, 368 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 377 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-21 11:11:18,122 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [377 Valid, 404 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-21 11:11:18,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71557 states. [2023-12-21 11:11:20,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71557 to 65878. [2023-12-21 11:11:20,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65878 states, 54982 states have (on average 1.3281073805972863) internal successors, (73022), 56058 states have internal predecessors, (73022), 6164 states have call successors, (6164), 3832 states have call predecessors, (6164), 4731 states have return successors, (9893), 5988 states have call predecessors, (9893), 6161 states have call successors, (9893) [2023-12-21 11:11:21,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65878 states to 65878 states and 89079 transitions. [2023-12-21 11:11:21,040 INFO L78 Accepts]: Start accepts. Automaton has 65878 states and 89079 transitions. Word has length 109 [2023-12-21 11:11:21,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 11:11:21,040 INFO L495 AbstractCegarLoop]: Abstraction has 65878 states and 89079 transitions. [2023-12-21 11:11:21,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 3 states have internal predecessors, (70), 2 states have call successors, (11), 4 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-12-21 11:11:21,041 INFO L276 IsEmpty]: Start isEmpty. Operand 65878 states and 89079 transitions. [2023-12-21 11:11:21,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2023-12-21 11:11:21,057 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 11:11:21,057 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 11:11:21,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-12-21 11:11:21,058 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 11:11:21,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 11:11:21,058 INFO L85 PathProgramCache]: Analyzing trace with hash -612010056, now seen corresponding path program 1 times [2023-12-21 11:11:21,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 11:11:21,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391747285] [2023-12-21 11:11:21,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:11:21,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 11:11:21,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:11:21,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-21 11:11:21,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:11:21,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-21 11:11:21,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:11:21,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-12-21 11:11:21,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:11:21,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-12-21 11:11:21,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:11:21,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-12-21 11:11:21,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:11:21,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2023-12-21 11:11:21,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:11:21,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2023-12-21 11:11:21,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:11:21,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2023-12-21 11:11:21,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:11:21,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2023-12-21 11:11:21,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:11:21,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2023-12-21 11:11:21,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:11:21,160 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 21 proven. 13 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-12-21 11:11:21,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 11:11:21,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391747285] [2023-12-21 11:11:21,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391747285] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 11:11:21,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946538076] [2023-12-21 11:11:21,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:11:21,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 11:11:21,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 11:11:21,162 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 11:11:21,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-21 11:11:21,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:11:21,503 INFO L262 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-21 11:11:21,509 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 11:11:21,604 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-21 11:11:21,605 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-21 11:11:21,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946538076] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 11:11:21,605 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-21 11:11:21,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [8] total 9 [2023-12-21 11:11:21,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235352317] [2023-12-21 11:11:21,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 11:11:21,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-21 11:11:21,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 11:11:21,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-21 11:11:21,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2023-12-21 11:11:21,606 INFO L87 Difference]: Start difference. First operand 65878 states and 89079 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-12-21 11:11:25,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 11:11:25,409 INFO L93 Difference]: Finished difference Result 163026 states and 220174 transitions. [2023-12-21 11:11:25,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-21 11:11:25,410 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 125 [2023-12-21 11:11:25,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 11:11:25,755 INFO L225 Difference]: With dead ends: 163026 [2023-12-21 11:11:25,755 INFO L226 Difference]: Without dead ends: 97158 [2023-12-21 11:11:25,825 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2023-12-21 11:11:25,826 INFO L413 NwaCegarLoop]: 183 mSDtfsCounter, 90 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 11:11:25,826 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 328 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 11:11:25,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97158 states. [2023-12-21 11:11:29,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97158 to 97153. [2023-12-21 11:11:29,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97153 states, 80729 states have (on average 1.314843488709138) internal successors, (106146), 82231 states have internal predecessors, (106146), 9318 states have call successors, (9318), 5826 states have call predecessors, (9318), 7105 states have return successors, (14307), 9096 states have call predecessors, (14307), 9315 states have call successors, (14307) [2023-12-21 11:11:30,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97153 states to 97153 states and 129771 transitions. [2023-12-21 11:11:30,199 INFO L78 Accepts]: Start accepts. Automaton has 97153 states and 129771 transitions. Word has length 125 [2023-12-21 11:11:30,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 11:11:30,199 INFO L495 AbstractCegarLoop]: Abstraction has 97153 states and 129771 transitions. [2023-12-21 11:11:30,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-12-21 11:11:30,199 INFO L276 IsEmpty]: Start isEmpty. Operand 97153 states and 129771 transitions. [2023-12-21 11:11:30,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2023-12-21 11:11:30,212 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 11:11:30,212 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-12-21 11:11:30,222 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-21 11:11:30,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 11:11:30,418 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 11:11:30,418 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 11:11:30,419 INFO L85 PathProgramCache]: Analyzing trace with hash 501999954, now seen corresponding path program 1 times [2023-12-21 11:11:30,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 11:11:30,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932795254] [2023-12-21 11:11:30,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:11:30,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 11:11:30,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:11:30,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-21 11:11:30,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:11:30,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-21 11:11:30,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:11:30,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-12-21 11:11:30,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:11:30,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-12-21 11:11:30,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:11:30,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-12-21 11:11:30,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:11:30,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2023-12-21 11:11:30,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:11:30,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2023-12-21 11:11:30,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:11:30,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2023-12-21 11:11:30,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:11:30,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2023-12-21 11:11:30,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:11:30,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2023-12-21 11:11:30,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:11:30,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2023-12-21 11:11:30,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:11:30,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2023-12-21 11:11:30,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:11:30,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2023-12-21 11:11:30,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:11:30,513 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-12-21 11:11:30,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 11:11:30,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932795254] [2023-12-21 11:11:30,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932795254] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 11:11:30,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641961934] [2023-12-21 11:11:30,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:11:30,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 11:11:30,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 11:11:30,514 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 11:11:30,536 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-21 11:11:30,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:11:30,594 INFO L262 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-21 11:11:30,598 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 11:11:30,694 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-12-21 11:11:30,694 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-21 11:11:30,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641961934] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 11:11:30,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-21 11:11:30,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [8] total 9 [2023-12-21 11:11:30,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524628750] [2023-12-21 11:11:30,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 11:11:30,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-21 11:11:30,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 11:11:30,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-21 11:11:30,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-12-21 11:11:30,696 INFO L87 Difference]: Start difference. First operand 97153 states and 129771 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2023-12-21 11:11:37,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 11:11:37,709 INFO L93 Difference]: Finished difference Result 278997 states and 378983 transitions. [2023-12-21 11:11:37,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-21 11:11:37,709 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 128 [2023-12-21 11:11:37,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 11:11:38,320 INFO L225 Difference]: With dead ends: 278997 [2023-12-21 11:11:38,320 INFO L226 Difference]: Without dead ends: 187955 [2023-12-21 11:11:38,434 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-12-21 11:11:38,435 INFO L413 NwaCegarLoop]: 172 mSDtfsCounter, 104 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 11:11:38,435 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 318 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 11:11:38,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187955 states.