/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.use.bitabs.translation true -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/systemc/kundu2.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-20 00:35:15,776 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-20 00:35:15,849 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-12-20 00:35:15,852 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-20 00:35:15,852 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-20 00:35:15,876 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-20 00:35:15,877 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-20 00:35:15,877 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-20 00:35:15,878 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-20 00:35:15,881 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-20 00:35:15,881 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-20 00:35:15,881 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-20 00:35:15,881 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-20 00:35:15,882 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-20 00:35:15,883 INFO L153 SettingsManager]: * Use SBE=true [2023-12-20 00:35:15,883 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-20 00:35:15,883 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-20 00:35:15,883 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-20 00:35:15,883 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-20 00:35:15,883 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-20 00:35:15,884 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-20 00:35:15,884 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-20 00:35:15,884 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-20 00:35:15,884 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-20 00:35:15,884 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-20 00:35:15,885 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-20 00:35:15,885 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-20 00:35:15,885 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-20 00:35:15,885 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-20 00:35:15,885 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-20 00:35:15,886 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-20 00:35:15,886 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-20 00:35:15,886 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-20 00:35:15,887 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-20 00:35:15,887 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-20 00:35:15,887 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-20 00:35:15,887 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-20 00:35:15,887 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-20 00:35:15,887 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-20 00:35:15,887 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-20 00:35:15,887 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-20 00:35:15,888 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-20 00:35:15,888 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-20 00:35:15,888 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> true [2023-12-20 00:35:16,079 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-20 00:35:16,093 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-20 00:35:16,095 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-20 00:35:16,096 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-20 00:35:16,096 INFO L274 PluginConnector]: CDTParser initialized [2023-12-20 00:35:16,097 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/systemc/kundu2.cil.c [2023-12-20 00:35:17,121 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-20 00:35:17,249 INFO L384 CDTParser]: Found 1 translation units. [2023-12-20 00:35:17,249 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/systemc/kundu2.cil.c [2023-12-20 00:35:17,271 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/25451cd9b/b547e557756747d8b0c82e70d5d7a823/FLAGc709aa9e4 [2023-12-20 00:35:17,286 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/25451cd9b/b547e557756747d8b0c82e70d5d7a823 [2023-12-20 00:35:17,289 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-20 00:35:17,291 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-20 00:35:17,292 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-20 00:35:17,292 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-20 00:35:17,296 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-20 00:35:17,296 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.12 12:35:17" (1/1) ... [2023-12-20 00:35:17,297 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@564d9c6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 12:35:17, skipping insertion in model container [2023-12-20 00:35:17,297 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.12 12:35:17" (1/1) ... [2023-12-20 00:35:17,335 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-20 00:35:17,423 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/kundu2.cil.c[636,649] [2023-12-20 00:35:17,464 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-20 00:35:17,473 INFO L202 MainTranslator]: Completed pre-run [2023-12-20 00:35:17,480 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/kundu2.cil.c[636,649] [2023-12-20 00:35:17,502 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-20 00:35:17,512 INFO L206 MainTranslator]: Completed translation [2023-12-20 00:35:17,512 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 12:35:17 WrapperNode [2023-12-20 00:35:17,513 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-20 00:35:17,513 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-20 00:35:17,513 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-20 00:35:17,513 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-20 00:35:17,518 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 12:35:17" (1/1) ... [2023-12-20 00:35:17,522 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 12:35:17" (1/1) ... [2023-12-20 00:35:17,541 INFO L138 Inliner]: procedures = 34, calls = 40, calls flagged for inlining = 17, calls inlined = 17, statements flattened = 312 [2023-12-20 00:35:17,541 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-20 00:35:17,541 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-20 00:35:17,542 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-20 00:35:17,542 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-20 00:35:17,548 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 12:35:17" (1/1) ... [2023-12-20 00:35:17,548 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 12:35:17" (1/1) ... [2023-12-20 00:35:17,551 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 12:35:17" (1/1) ... [2023-12-20 00:35:17,560 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2023-12-20 00:35:17,560 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 12:35:17" (1/1) ... [2023-12-20 00:35:17,560 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 12:35:17" (1/1) ... [2023-12-20 00:35:17,565 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 12:35:17" (1/1) ... [2023-12-20 00:35:17,569 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 12:35:17" (1/1) ... [2023-12-20 00:35:17,570 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 12:35:17" (1/1) ... [2023-12-20 00:35:17,571 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 12:35:17" (1/1) ... [2023-12-20 00:35:17,573 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-20 00:35:17,574 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-20 00:35:17,574 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-20 00:35:17,574 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-20 00:35:17,574 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 12:35:17" (1/1) ... [2023-12-20 00:35:17,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-20 00:35:17,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 00:35:17,621 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-12-20 00:35:17,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-12-20 00:35:17,675 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-20 00:35:17,676 INFO L130 BoogieDeclarations]: Found specification of procedure write_data [2023-12-20 00:35:17,676 INFO L138 BoogieDeclarations]: Found implementation of procedure write_data [2023-12-20 00:35:17,676 INFO L130 BoogieDeclarations]: Found specification of procedure error [2023-12-20 00:35:17,676 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2023-12-20 00:35:17,676 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2023-12-20 00:35:17,677 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2023-12-20 00:35:17,677 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2023-12-20 00:35:17,678 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2023-12-20 00:35:17,678 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2023-12-20 00:35:17,678 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2023-12-20 00:35:17,678 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2023-12-20 00:35:17,678 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2023-12-20 00:35:17,678 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-20 00:35:17,678 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2023-12-20 00:35:17,678 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2023-12-20 00:35:17,678 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-20 00:35:17,678 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-20 00:35:17,754 INFO L241 CfgBuilder]: Building ICFG [2023-12-20 00:35:17,755 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-20 00:35:18,006 INFO L282 CfgBuilder]: Performing block encoding [2023-12-20 00:35:18,032 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-20 00:35:18,032 INFO L309 CfgBuilder]: Removed 5 assume(true) statements. [2023-12-20 00:35:18,032 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.12 12:35:18 BoogieIcfgContainer [2023-12-20 00:35:18,032 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-20 00:35:18,034 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-20 00:35:18,034 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-20 00:35:18,036 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-20 00:35:18,036 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.12 12:35:17" (1/3) ... [2023-12-20 00:35:18,036 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a543ddf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.12 12:35:18, skipping insertion in model container [2023-12-20 00:35:18,036 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 12:35:17" (2/3) ... [2023-12-20 00:35:18,037 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a543ddf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.12 12:35:18, skipping insertion in model container [2023-12-20 00:35:18,037 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.12 12:35:18" (3/3) ... [2023-12-20 00:35:18,037 INFO L112 eAbstractionObserver]: Analyzing ICFG kundu2.cil.c [2023-12-20 00:35:18,048 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-20 00:35:18,048 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-20 00:35:18,078 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-20 00:35:18,082 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;@7e64dca7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-20 00:35:18,082 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-20 00:35:18,085 INFO L276 IsEmpty]: Start isEmpty. Operand has 121 states, 94 states have (on average 1.5851063829787233) internal successors, (149), 98 states have internal predecessors, (149), 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) [2023-12-20 00:35:18,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-12-20 00:35:18,091 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 00:35:18,091 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] [2023-12-20 00:35:18,092 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 00:35:18,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 00:35:18,095 INFO L85 PathProgramCache]: Analyzing trace with hash 545397817, now seen corresponding path program 1 times [2023-12-20 00:35:18,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 00:35:18,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706930935] [2023-12-20 00:35:18,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 00:35:18,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 00:35:18,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:18,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-20 00:35:18,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:18,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-20 00:35:18,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:18,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-12-20 00:35:18,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:18,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-12-20 00:35:18,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:18,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-12-20 00:35:18,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:18,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 00:35:18,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 00:35:18,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706930935] [2023-12-20 00:35:18,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706930935] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 00:35:18,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 00:35:18,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-20 00:35:18,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568474849] [2023-12-20 00:35:18,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 00:35:18,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-20 00:35:18,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 00:35:18,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-20 00:35:18,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-20 00:35:18,309 INFO L87 Difference]: Start difference. First operand has 121 states, 94 states have (on average 1.5851063829787233) internal successors, (149), 98 states have internal predecessors, (149), 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) [2023-12-20 00:35:18,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 00:35:18,460 INFO L93 Difference]: Finished difference Result 252 states and 392 transitions. [2023-12-20 00:35:18,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-20 00:35:18,463 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 [2023-12-20 00:35:18,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 00:35:18,469 INFO L225 Difference]: With dead ends: 252 [2023-12-20 00:35:18,469 INFO L226 Difference]: Without dead ends: 133 [2023-12-20 00:35:18,472 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 [2023-12-20 00:35:18,475 INFO L413 NwaCegarLoop]: 168 mSDtfsCounter, 205 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 00:35:18,475 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [215 Valid, 254 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 00:35:18,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2023-12-20 00:35:18,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 117. [2023-12-20 00:35:18,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 92 states have (on average 1.4891304347826086) internal successors, (137), 95 states have internal predecessors, (137), 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) [2023-12-20 00:35:18,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 170 transitions. [2023-12-20 00:35:18,529 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 170 transitions. Word has length 52 [2023-12-20 00:35:18,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 00:35:18,529 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 170 transitions. [2023-12-20 00:35:18,529 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) [2023-12-20 00:35:18,529 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 170 transitions. [2023-12-20 00:35:18,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-12-20 00:35:18,531 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 00:35:18,531 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] [2023-12-20 00:35:18,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-20 00:35:18,531 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 00:35:18,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 00:35:18,532 INFO L85 PathProgramCache]: Analyzing trace with hash 898486199, now seen corresponding path program 1 times [2023-12-20 00:35:18,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 00:35:18,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733912837] [2023-12-20 00:35:18,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 00:35:18,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 00:35:18,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:18,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-20 00:35:18,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:18,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-20 00:35:18,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:18,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-12-20 00:35:18,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:18,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-12-20 00:35:18,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:18,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-12-20 00:35:18,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:18,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 00:35:18,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 00:35:18,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733912837] [2023-12-20 00:35:18,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733912837] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 00:35:18,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 00:35:18,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-20 00:35:18,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033710464] [2023-12-20 00:35:18,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 00:35:18,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-20 00:35:18,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 00:35:18,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-20 00:35:18,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-20 00:35:18,726 INFO L87 Difference]: Start difference. First operand 117 states and 170 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) [2023-12-20 00:35:19,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 00:35:19,035 INFO L93 Difference]: Finished difference Result 362 states and 533 transitions. [2023-12-20 00:35:19,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-20 00:35:19,036 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 [2023-12-20 00:35:19,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 00:35:19,041 INFO L225 Difference]: With dead ends: 362 [2023-12-20 00:35:19,041 INFO L226 Difference]: Without dead ends: 254 [2023-12-20 00:35:19,045 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 [2023-12-20 00:35:19,047 INFO L413 NwaCegarLoop]: 306 mSDtfsCounter, 364 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 381 SdHoareTripleChecker+Valid, 706 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-20 00:35:19,048 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [381 Valid, 706 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-20 00:35:19,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2023-12-20 00:35:19,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 216. [2023-12-20 00:35:19,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 174 states have (on average 1.4770114942528736) internal successors, (257), 178 states have internal predecessors, (257), 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) [2023-12-20 00:35:19,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 312 transitions. [2023-12-20 00:35:19,075 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 312 transitions. Word has length 52 [2023-12-20 00:35:19,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 00:35:19,076 INFO L495 AbstractCegarLoop]: Abstraction has 216 states and 312 transitions. [2023-12-20 00:35:19,079 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) [2023-12-20 00:35:19,079 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 312 transitions. [2023-12-20 00:35:19,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-12-20 00:35:19,084 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 00:35:19,085 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] [2023-12-20 00:35:19,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-20 00:35:19,085 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 00:35:19,086 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 00:35:19,087 INFO L85 PathProgramCache]: Analyzing trace with hash 1421806870, now seen corresponding path program 1 times [2023-12-20 00:35:19,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 00:35:19,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751052043] [2023-12-20 00:35:19,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 00:35:19,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 00:35:19,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:19,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-20 00:35:19,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:19,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-20 00:35:19,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:19,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-12-20 00:35:19,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:19,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-12-20 00:35:19,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:19,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-12-20 00:35:19,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:19,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 00:35:19,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 00:35:19,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751052043] [2023-12-20 00:35:19,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751052043] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 00:35:19,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 00:35:19,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-20 00:35:19,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066922534] [2023-12-20 00:35:19,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 00:35:19,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-20 00:35:19,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 00:35:19,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-20 00:35:19,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-20 00:35:19,251 INFO L87 Difference]: Start difference. First operand 216 states and 312 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) [2023-12-20 00:35:19,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 00:35:19,398 INFO L93 Difference]: Finished difference Result 461 states and 681 transitions. [2023-12-20 00:35:19,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-20 00:35:19,399 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 [2023-12-20 00:35:19,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 00:35:19,400 INFO L225 Difference]: With dead ends: 461 [2023-12-20 00:35:19,401 INFO L226 Difference]: Without dead ends: 254 [2023-12-20 00:35:19,401 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 [2023-12-20 00:35:19,402 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 74 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 534 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 00:35:19,402 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 534 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 00:35:19,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2023-12-20 00:35:19,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 218. [2023-12-20 00:35:19,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 176 states have (on average 1.4659090909090908) internal successors, (258), 180 states have internal predecessors, (258), 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) [2023-12-20 00:35:19,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 313 transitions. [2023-12-20 00:35:19,417 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 313 transitions. Word has length 52 [2023-12-20 00:35:19,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 00:35:19,417 INFO L495 AbstractCegarLoop]: Abstraction has 218 states and 313 transitions. [2023-12-20 00:35:19,417 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) [2023-12-20 00:35:19,417 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 313 transitions. [2023-12-20 00:35:19,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-12-20 00:35:19,418 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 00:35:19,418 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] [2023-12-20 00:35:19,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-20 00:35:19,418 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 00:35:19,418 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 00:35:19,419 INFO L85 PathProgramCache]: Analyzing trace with hash 577801368, now seen corresponding path program 1 times [2023-12-20 00:35:19,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 00:35:19,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514880665] [2023-12-20 00:35:19,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 00:35:19,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 00:35:19,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:19,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-20 00:35:19,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:19,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-20 00:35:19,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:19,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-12-20 00:35:19,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:19,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-12-20 00:35:19,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:19,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-12-20 00:35:19,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:19,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 00:35:19,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 00:35:19,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514880665] [2023-12-20 00:35:19,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514880665] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 00:35:19,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 00:35:19,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-20 00:35:19,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354779241] [2023-12-20 00:35:19,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 00:35:19,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-20 00:35:19,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 00:35:19,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-20 00:35:19,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-20 00:35:19,523 INFO L87 Difference]: Start difference. First operand 218 states and 313 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) [2023-12-20 00:35:19,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 00:35:19,925 INFO L93 Difference]: Finished difference Result 903 states and 1335 transitions. [2023-12-20 00:35:19,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-20 00:35:19,926 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 [2023-12-20 00:35:19,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 00:35:19,929 INFO L225 Difference]: With dead ends: 903 [2023-12-20 00:35:19,929 INFO L226 Difference]: Without dead ends: 694 [2023-12-20 00:35:19,930 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2023-12-20 00:35:19,931 INFO L413 NwaCegarLoop]: 281 mSDtfsCounter, 574 mSDsluCounter, 601 mSDsCounter, 0 mSdLazyCounter, 473 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 590 SdHoareTripleChecker+Valid, 882 SdHoareTripleChecker+Invalid, 572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-20 00:35:19,931 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [590 Valid, 882 Invalid, 572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 473 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-20 00:35:19,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 694 states. [2023-12-20 00:35:19,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 694 to 409. [2023-12-20 00:35:19,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 333 states have (on average 1.4534534534534536) internal successors, (484), 339 states have internal predecessors, (484), 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) [2023-12-20 00:35:19,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 586 transitions. [2023-12-20 00:35:19,958 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 586 transitions. Word has length 52 [2023-12-20 00:35:19,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 00:35:19,958 INFO L495 AbstractCegarLoop]: Abstraction has 409 states and 586 transitions. [2023-12-20 00:35:19,958 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) [2023-12-20 00:35:19,958 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 586 transitions. [2023-12-20 00:35:19,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-12-20 00:35:19,959 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 00:35:19,959 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 00:35:19,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-20 00:35:19,959 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 00:35:19,959 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 00:35:19,959 INFO L85 PathProgramCache]: Analyzing trace with hash 1767986603, now seen corresponding path program 1 times [2023-12-20 00:35:19,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 00:35:19,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960101763] [2023-12-20 00:35:19,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 00:35:19,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 00:35:19,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:19,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-20 00:35:19,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:19,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-20 00:35:19,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:19,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-12-20 00:35:19,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:20,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-12-20 00:35:20,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:20,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-12-20 00:35:20,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:20,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 00:35:20,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 00:35:20,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960101763] [2023-12-20 00:35:20,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960101763] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 00:35:20,008 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 00:35:20,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-20 00:35:20,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96907604] [2023-12-20 00:35:20,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 00:35:20,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-20 00:35:20,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 00:35:20,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-20 00:35:20,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-20 00:35:20,009 INFO L87 Difference]: Start difference. First operand 409 states and 586 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) [2023-12-20 00:35:20,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 00:35:20,131 INFO L93 Difference]: Finished difference Result 880 states and 1300 transitions. [2023-12-20 00:35:20,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-20 00:35:20,132 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 [2023-12-20 00:35:20,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 00:35:20,134 INFO L225 Difference]: With dead ends: 880 [2023-12-20 00:35:20,134 INFO L226 Difference]: Without dead ends: 480 [2023-12-20 00:35:20,135 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 [2023-12-20 00:35:20,136 INFO L413 NwaCegarLoop]: 150 mSDtfsCounter, 76 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 00:35:20,136 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 511 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 00:35:20,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2023-12-20 00:35:20,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 417. [2023-12-20 00:35:20,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 341 states have (on average 1.4428152492668622) internal successors, (492), 347 states have internal predecessors, (492), 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) [2023-12-20 00:35:20,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 594 transitions. [2023-12-20 00:35:20,161 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 594 transitions. Word has length 53 [2023-12-20 00:35:20,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 00:35:20,162 INFO L495 AbstractCegarLoop]: Abstraction has 417 states and 594 transitions. [2023-12-20 00:35:20,162 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) [2023-12-20 00:35:20,162 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 594 transitions. [2023-12-20 00:35:20,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-12-20 00:35:20,162 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 00:35:20,162 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 00:35:20,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-20 00:35:20,163 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 00:35:20,163 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 00:35:20,163 INFO L85 PathProgramCache]: Analyzing trace with hash -1825380819, now seen corresponding path program 1 times [2023-12-20 00:35:20,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 00:35:20,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267612796] [2023-12-20 00:35:20,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 00:35:20,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 00:35:20,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:20,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-20 00:35:20,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:20,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-20 00:35:20,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:20,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-12-20 00:35:20,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:20,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-12-20 00:35:20,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:20,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-12-20 00:35:20,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:20,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 00:35:20,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 00:35:20,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267612796] [2023-12-20 00:35:20,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267612796] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 00:35:20,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 00:35:20,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-20 00:35:20,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573975861] [2023-12-20 00:35:20,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 00:35:20,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-20 00:35:20,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 00:35:20,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-20 00:35:20,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-20 00:35:20,218 INFO L87 Difference]: Start difference. First operand 417 states and 594 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) [2023-12-20 00:35:20,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 00:35:20,336 INFO L93 Difference]: Finished difference Result 896 states and 1314 transitions. [2023-12-20 00:35:20,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-20 00:35:20,337 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 [2023-12-20 00:35:20,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 00:35:20,339 INFO L225 Difference]: With dead ends: 896 [2023-12-20 00:35:20,339 INFO L226 Difference]: Without dead ends: 488 [2023-12-20 00:35:20,339 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 [2023-12-20 00:35:20,340 INFO L413 NwaCegarLoop]: 149 mSDtfsCounter, 54 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 00:35:20,340 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 503 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 00:35:20,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2023-12-20 00:35:20,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 425. [2023-12-20 00:35:20,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 349 states have (on average 1.4326647564469914) internal successors, (500), 355 states have internal predecessors, (500), 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) [2023-12-20 00:35:20,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 602 transitions. [2023-12-20 00:35:20,359 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 602 transitions. Word has length 53 [2023-12-20 00:35:20,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 00:35:20,360 INFO L495 AbstractCegarLoop]: Abstraction has 425 states and 602 transitions. [2023-12-20 00:35:20,360 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) [2023-12-20 00:35:20,360 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 602 transitions. [2023-12-20 00:35:20,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-12-20 00:35:20,360 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 00:35:20,360 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 00:35:20,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-12-20 00:35:20,360 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 00:35:20,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 00:35:20,361 INFO L85 PathProgramCache]: Analyzing trace with hash -1684832209, now seen corresponding path program 1 times [2023-12-20 00:35:20,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 00:35:20,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427956186] [2023-12-20 00:35:20,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 00:35:20,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 00:35:20,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:20,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-20 00:35:20,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:20,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-20 00:35:20,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:20,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-12-20 00:35:20,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:20,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-12-20 00:35:20,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:20,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-12-20 00:35:20,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:20,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 00:35:20,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 00:35:20,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427956186] [2023-12-20 00:35:20,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427956186] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 00:35:20,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 00:35:20,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-20 00:35:20,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658380044] [2023-12-20 00:35:20,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 00:35:20,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-20 00:35:20,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 00:35:20,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-20 00:35:20,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-20 00:35:20,408 INFO L87 Difference]: Start difference. First operand 425 states and 602 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) [2023-12-20 00:35:20,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 00:35:20,595 INFO L93 Difference]: Finished difference Result 1333 states and 1903 transitions. [2023-12-20 00:35:20,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-20 00:35:20,596 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 [2023-12-20 00:35:20,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 00:35:20,599 INFO L225 Difference]: With dead ends: 1333 [2023-12-20 00:35:20,599 INFO L226 Difference]: Without dead ends: 918 [2023-12-20 00:35:20,600 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2023-12-20 00:35:20,600 INFO L413 NwaCegarLoop]: 167 mSDtfsCounter, 234 mSDsluCounter, 551 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 718 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 00:35:20,601 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [241 Valid, 718 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 00:35:20,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 918 states. [2023-12-20 00:35:20,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 918 to 792. [2023-12-20 00:35:20,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 792 states, 652 states have (on average 1.4233128834355828) internal successors, (928), 666 states have internal predecessors, (928), 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) [2023-12-20 00:35:20,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 792 states to 792 states and 1112 transitions. [2023-12-20 00:35:20,635 INFO L78 Accepts]: Start accepts. Automaton has 792 states and 1112 transitions. Word has length 53 [2023-12-20 00:35:20,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 00:35:20,636 INFO L495 AbstractCegarLoop]: Abstraction has 792 states and 1112 transitions. [2023-12-20 00:35:20,636 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) [2023-12-20 00:35:20,636 INFO L276 IsEmpty]: Start isEmpty. Operand 792 states and 1112 transitions. [2023-12-20 00:35:20,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-12-20 00:35:20,636 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 00:35:20,636 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] [2023-12-20 00:35:20,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-12-20 00:35:20,637 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 00:35:20,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 00:35:20,637 INFO L85 PathProgramCache]: Analyzing trace with hash -657803255, now seen corresponding path program 1 times [2023-12-20 00:35:20,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 00:35:20,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21612683] [2023-12-20 00:35:20,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 00:35:20,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 00:35:20,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:20,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-20 00:35:20,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:20,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-20 00:35:20,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:20,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-12-20 00:35:20,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:20,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-12-20 00:35:20,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:20,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-12-20 00:35:20,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:20,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2023-12-20 00:35:20,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:20,708 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 00:35:20,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 00:35:20,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21612683] [2023-12-20 00:35:20,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21612683] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 00:35:20,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535957396] [2023-12-20 00:35:20,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 00:35:20,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 00:35:20,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 00:35:20,711 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 00:35:20,746 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-20 00:35:20,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:20,812 INFO L262 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-20 00:35:20,816 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 00:35:20,879 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 00:35:20,879 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 00:35:20,920 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 00:35:20,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535957396] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-20 00:35:20,920 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-20 00:35:20,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8, 5] total 8 [2023-12-20 00:35:20,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786319071] [2023-12-20 00:35:20,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 00:35:20,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-20 00:35:20,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 00:35:20,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-20 00:35:20,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-12-20 00:35:20,921 INFO L87 Difference]: Start difference. First operand 792 states and 1112 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) [2023-12-20 00:35:21,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 00:35:21,088 INFO L93 Difference]: Finished difference Result 2202 states and 3110 transitions. [2023-12-20 00:35:21,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-20 00:35:21,089 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 [2023-12-20 00:35:21,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 00:35:21,093 INFO L225 Difference]: With dead ends: 2202 [2023-12-20 00:35:21,094 INFO L226 Difference]: Without dead ends: 1509 [2023-12-20 00:35:21,095 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 [2023-12-20 00:35:21,095 INFO L413 NwaCegarLoop]: 283 mSDtfsCounter, 275 mSDsluCounter, 838 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 1121 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 00:35:21,096 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [277 Valid, 1121 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 00:35:21,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1509 states. [2023-12-20 00:35:21,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1509 to 1480. [2023-12-20 00:35:21,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1480 states, 1224 states have (on average 1.4199346405228759) internal successors, (1738), 1247 states have internal predecessors, (1738), 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) [2023-12-20 00:35:21,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1480 states to 1480 states and 2075 transitions. [2023-12-20 00:35:21,155 INFO L78 Accepts]: Start accepts. Automaton has 1480 states and 2075 transitions. Word has length 64 [2023-12-20 00:35:21,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 00:35:21,155 INFO L495 AbstractCegarLoop]: Abstraction has 1480 states and 2075 transitions. [2023-12-20 00:35:21,155 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) [2023-12-20 00:35:21,155 INFO L276 IsEmpty]: Start isEmpty. Operand 1480 states and 2075 transitions. [2023-12-20 00:35:21,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-12-20 00:35:21,156 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 00:35:21,156 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] [2023-12-20 00:35:21,163 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-20 00:35:21,361 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 [2023-12-20 00:35:21,361 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 00:35:21,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 00:35:21,362 INFO L85 PathProgramCache]: Analyzing trace with hash -486902863, now seen corresponding path program 1 times [2023-12-20 00:35:21,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 00:35:21,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804876629] [2023-12-20 00:35:21,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 00:35:21,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 00:35:21,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:21,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-20 00:35:21,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:21,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-20 00:35:21,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:21,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-12-20 00:35:21,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:21,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-12-20 00:35:21,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:21,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-12-20 00:35:21,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:21,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2023-12-20 00:35:21,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:21,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 00:35:21,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 00:35:21,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804876629] [2023-12-20 00:35:21,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804876629] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 00:35:21,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 00:35:21,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-20 00:35:21,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639477050] [2023-12-20 00:35:21,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 00:35:21,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-20 00:35:21,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 00:35:21,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-20 00:35:21,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-20 00:35:21,414 INFO L87 Difference]: Start difference. First operand 1480 states and 2075 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) [2023-12-20 00:35:21,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 00:35:21,837 INFO L93 Difference]: Finished difference Result 4662 states and 6646 transitions. [2023-12-20 00:35:21,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-20 00:35:21,837 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 [2023-12-20 00:35:21,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 00:35:21,849 INFO L225 Difference]: With dead ends: 4662 [2023-12-20 00:35:21,849 INFO L226 Difference]: Without dead ends: 3192 [2023-12-20 00:35:21,853 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 [2023-12-20 00:35:21,854 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 349 mSDsluCounter, 430 mSDsCounter, 0 mSdLazyCounter, 401 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 354 SdHoareTripleChecker+Valid, 596 SdHoareTripleChecker+Invalid, 464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-20 00:35:21,854 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [354 Valid, 596 Invalid, 464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 401 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-20 00:35:21,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3192 states. [2023-12-20 00:35:21,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3192 to 2904. [2023-12-20 00:35:21,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2904 states, 2427 states have (on average 1.4009064688916357) internal successors, (3400), 2468 states have internal predecessors, (3400), 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) [2023-12-20 00:35:21,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2904 states to 2904 states and 4093 transitions. [2023-12-20 00:35:21,996 INFO L78 Accepts]: Start accepts. Automaton has 2904 states and 4093 transitions. Word has length 66 [2023-12-20 00:35:21,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 00:35:21,996 INFO L495 AbstractCegarLoop]: Abstraction has 2904 states and 4093 transitions. [2023-12-20 00:35:21,996 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) [2023-12-20 00:35:21,996 INFO L276 IsEmpty]: Start isEmpty. Operand 2904 states and 4093 transitions. [2023-12-20 00:35:21,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-12-20 00:35:21,997 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 00:35:21,997 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] [2023-12-20 00:35:21,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-12-20 00:35:21,998 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 00:35:21,998 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 00:35:21,998 INFO L85 PathProgramCache]: Analyzing trace with hash -285078929, now seen corresponding path program 1 times [2023-12-20 00:35:21,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 00:35:21,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284994917] [2023-12-20 00:35:21,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 00:35:21,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 00:35:22,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:22,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-20 00:35:22,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:22,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-20 00:35:22,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:22,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-12-20 00:35:22,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:22,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-12-20 00:35:22,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:22,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-12-20 00:35:22,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:22,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2023-12-20 00:35:22,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:22,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 00:35:22,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 00:35:22,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284994917] [2023-12-20 00:35:22,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284994917] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 00:35:22,027 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 00:35:22,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-20 00:35:22,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524773004] [2023-12-20 00:35:22,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 00:35:22,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-20 00:35:22,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 00:35:22,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-20 00:35:22,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-20 00:35:22,028 INFO L87 Difference]: Start difference. First operand 2904 states and 4093 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) [2023-12-20 00:35:22,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 00:35:22,263 INFO L93 Difference]: Finished difference Result 6105 states and 8643 transitions. [2023-12-20 00:35:22,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-20 00:35:22,264 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 [2023-12-20 00:35:22,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 00:35:22,275 INFO L225 Difference]: With dead ends: 6105 [2023-12-20 00:35:22,275 INFO L226 Difference]: Without dead ends: 3210 [2023-12-20 00:35:22,281 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 [2023-12-20 00:35:22,281 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 284 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 00:35:22,281 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [300 Valid, 254 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 00:35:22,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3210 states. [2023-12-20 00:35:22,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3210 to 2899. [2023-12-20 00:35:22,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2899 states, 2425 states have (on average 1.4004123711340206) internal successors, (3396), 2465 states have internal predecessors, (3396), 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) [2023-12-20 00:35:22,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2899 states to 2899 states and 4082 transitions. [2023-12-20 00:35:22,403 INFO L78 Accepts]: Start accepts. Automaton has 2899 states and 4082 transitions. Word has length 66 [2023-12-20 00:35:22,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 00:35:22,403 INFO L495 AbstractCegarLoop]: Abstraction has 2899 states and 4082 transitions. [2023-12-20 00:35:22,403 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) [2023-12-20 00:35:22,403 INFO L276 IsEmpty]: Start isEmpty. Operand 2899 states and 4082 transitions. [2023-12-20 00:35:22,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-12-20 00:35:22,404 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 00:35:22,404 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] [2023-12-20 00:35:22,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-12-20 00:35:22,404 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 00:35:22,404 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 00:35:22,404 INFO L85 PathProgramCache]: Analyzing trace with hash -421143662, now seen corresponding path program 1 times [2023-12-20 00:35:22,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 00:35:22,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724457364] [2023-12-20 00:35:22,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 00:35:22,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 00:35:22,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:22,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-20 00:35:22,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:22,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-20 00:35:22,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:22,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-12-20 00:35:22,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:22,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-12-20 00:35:22,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:22,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-12-20 00:35:22,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:22,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2023-12-20 00:35:22,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:22,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 00:35:22,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 00:35:22,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724457364] [2023-12-20 00:35:22,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724457364] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 00:35:22,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 00:35:22,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-20 00:35:22,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708993425] [2023-12-20 00:35:22,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 00:35:22,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-20 00:35:22,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 00:35:22,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-20 00:35:22,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-20 00:35:22,440 INFO L87 Difference]: Start difference. First operand 2899 states and 4082 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) [2023-12-20 00:35:22,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 00:35:22,819 INFO L93 Difference]: Finished difference Result 8395 states and 11934 transitions. [2023-12-20 00:35:22,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-20 00:35:22,820 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 [2023-12-20 00:35:22,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 00:35:22,837 INFO L225 Difference]: With dead ends: 8395 [2023-12-20 00:35:22,837 INFO L226 Difference]: Without dead ends: 5505 [2023-12-20 00:35:22,844 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 [2023-12-20 00:35:22,844 INFO L413 NwaCegarLoop]: 140 mSDtfsCounter, 346 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 358 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-20 00:35:22,845 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [358 Valid, 392 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-20 00:35:22,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5505 states. [2023-12-20 00:35:23,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5505 to 4578. [2023-12-20 00:35:23,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4578 states, 3795 states have (on average 1.361528326745718) internal successors, (5167), 3859 states have internal predecessors, (5167), 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) [2023-12-20 00:35:23,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4578 states to 4578 states and 6307 transitions. [2023-12-20 00:35:23,082 INFO L78 Accepts]: Start accepts. Automaton has 4578 states and 6307 transitions. Word has length 67 [2023-12-20 00:35:23,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 00:35:23,082 INFO L495 AbstractCegarLoop]: Abstraction has 4578 states and 6307 transitions. [2023-12-20 00:35:23,083 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) [2023-12-20 00:35:23,083 INFO L276 IsEmpty]: Start isEmpty. Operand 4578 states and 6307 transitions. [2023-12-20 00:35:23,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-12-20 00:35:23,083 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 00:35:23,083 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] [2023-12-20 00:35:23,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-12-20 00:35:23,084 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 00:35:23,084 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 00:35:23,084 INFO L85 PathProgramCache]: Analyzing trace with hash 1085136470, now seen corresponding path program 1 times [2023-12-20 00:35:23,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 00:35:23,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822205427] [2023-12-20 00:35:23,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 00:35:23,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 00:35:23,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:23,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-20 00:35:23,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:23,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-20 00:35:23,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:23,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-12-20 00:35:23,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:23,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-12-20 00:35:23,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:23,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-12-20 00:35:23,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:23,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2023-12-20 00:35:23,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:23,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 00:35:23,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 00:35:23,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822205427] [2023-12-20 00:35:23,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822205427] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 00:35:23,150 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 00:35:23,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-12-20 00:35:23,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639036536] [2023-12-20 00:35:23,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 00:35:23,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-20 00:35:23,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 00:35:23,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-20 00:35:23,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-12-20 00:35:23,151 INFO L87 Difference]: Start difference. First operand 4578 states and 6307 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) [2023-12-20 00:35:23,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 00:35:23,796 INFO L93 Difference]: Finished difference Result 11921 states and 16481 transitions. [2023-12-20 00:35:23,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-12-20 00:35:23,797 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 [2023-12-20 00:35:23,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 00:35:23,819 INFO L225 Difference]: With dead ends: 11921 [2023-12-20 00:35:23,819 INFO L226 Difference]: Without dead ends: 7510 [2023-12-20 00:35:23,828 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 [2023-12-20 00:35:23,829 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 712 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 503 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 732 SdHoareTripleChecker+Valid, 471 SdHoareTripleChecker+Invalid, 612 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-20 00:35:23,829 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [732 Valid, 471 Invalid, 612 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 503 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-20 00:35:23,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7510 states. [2023-12-20 00:35:24,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7510 to 6716. [2023-12-20 00:35:24,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6716 states, 5581 states have (on average 1.3619423042465508) internal successors, (7601), 5661 states have internal predecessors, (7601), 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) [2023-12-20 00:35:24,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6716 states to 6716 states and 9259 transitions. [2023-12-20 00:35:24,090 INFO L78 Accepts]: Start accepts. Automaton has 6716 states and 9259 transitions. Word has length 68 [2023-12-20 00:35:24,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 00:35:24,090 INFO L495 AbstractCegarLoop]: Abstraction has 6716 states and 9259 transitions. [2023-12-20 00:35:24,090 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) [2023-12-20 00:35:24,090 INFO L276 IsEmpty]: Start isEmpty. Operand 6716 states and 9259 transitions. [2023-12-20 00:35:24,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-12-20 00:35:24,091 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 00:35:24,091 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] [2023-12-20 00:35:24,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-12-20 00:35:24,091 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 00:35:24,092 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 00:35:24,092 INFO L85 PathProgramCache]: Analyzing trace with hash -1794577429, now seen corresponding path program 1 times [2023-12-20 00:35:24,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 00:35:24,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810477412] [2023-12-20 00:35:24,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 00:35:24,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 00:35:24,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:24,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-20 00:35:24,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:24,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-20 00:35:24,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:24,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-12-20 00:35:24,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:24,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-12-20 00:35:24,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:24,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-12-20 00:35:24,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:24,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-12-20 00:35:24,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:24,133 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-20 00:35:24,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 00:35:24,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810477412] [2023-12-20 00:35:24,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810477412] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 00:35:24,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664789842] [2023-12-20 00:35:24,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 00:35:24,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 00:35:24,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 00:35:24,134 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 00:35:24,208 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-20 00:35:24,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:24,233 INFO L262 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-20 00:35:24,234 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 00:35:24,267 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 00:35:24,267 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-20 00:35:24,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664789842] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 00:35:24,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-20 00:35:24,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-12-20 00:35:24,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850329310] [2023-12-20 00:35:24,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 00:35:24,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-20 00:35:24,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 00:35:24,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-20 00:35:24,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-20 00:35:24,268 INFO L87 Difference]: Start difference. First operand 6716 states and 9259 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) [2023-12-20 00:35:24,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 00:35:24,677 INFO L93 Difference]: Finished difference Result 17623 states and 24569 transitions. [2023-12-20 00:35:24,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-20 00:35:24,678 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 [2023-12-20 00:35:24,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 00:35:24,721 INFO L225 Difference]: With dead ends: 17623 [2023-12-20 00:35:24,721 INFO L226 Difference]: Without dead ends: 10917 [2023-12-20 00:35:24,738 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 [2023-12-20 00:35:24,739 INFO L413 NwaCegarLoop]: 274 mSDtfsCounter, 122 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 00:35:24,739 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 425 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 00:35:24,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10917 states. [2023-12-20 00:35:25,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10917 to 10407. [2023-12-20 00:35:25,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10407 states, 8594 states have (on average 1.351873400046544) internal successors, (11618), 8724 states have internal predecessors, (11618), 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) [2023-12-20 00:35:25,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10407 states to 10407 states and 14432 transitions. [2023-12-20 00:35:25,179 INFO L78 Accepts]: Start accepts. Automaton has 10407 states and 14432 transitions. Word has length 71 [2023-12-20 00:35:25,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 00:35:25,179 INFO L495 AbstractCegarLoop]: Abstraction has 10407 states and 14432 transitions. [2023-12-20 00:35:25,179 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) [2023-12-20 00:35:25,180 INFO L276 IsEmpty]: Start isEmpty. Operand 10407 states and 14432 transitions. [2023-12-20 00:35:25,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-12-20 00:35:25,182 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 00:35:25,182 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] [2023-12-20 00:35:25,196 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-20 00:35:25,387 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 [2023-12-20 00:35:25,387 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 00:35:25,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 00:35:25,387 INFO L85 PathProgramCache]: Analyzing trace with hash -913772689, now seen corresponding path program 1 times [2023-12-20 00:35:25,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 00:35:25,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137775210] [2023-12-20 00:35:25,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 00:35:25,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 00:35:25,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:25,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-20 00:35:25,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:25,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-20 00:35:25,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:25,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-12-20 00:35:25,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:25,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-12-20 00:35:25,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:25,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-12-20 00:35:25,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:25,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2023-12-20 00:35:25,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:25,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2023-12-20 00:35:25,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:25,454 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-20 00:35:25,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 00:35:25,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137775210] [2023-12-20 00:35:25,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137775210] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 00:35:25,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 00:35:25,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-20 00:35:25,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203608956] [2023-12-20 00:35:25,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 00:35:25,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-20 00:35:25,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 00:35:25,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-20 00:35:25,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-20 00:35:25,457 INFO L87 Difference]: Start difference. First operand 10407 states and 14432 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) [2023-12-20 00:35:26,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 00:35:26,507 INFO L93 Difference]: Finished difference Result 26070 states and 36370 transitions. [2023-12-20 00:35:26,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-12-20 00:35:26,507 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 [2023-12-20 00:35:26,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 00:35:26,544 INFO L225 Difference]: With dead ends: 26070 [2023-12-20 00:35:26,545 INFO L226 Difference]: Without dead ends: 16996 [2023-12-20 00:35:26,564 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 [2023-12-20 00:35:26,564 INFO L413 NwaCegarLoop]: 272 mSDtfsCounter, 746 mSDsluCounter, 653 mSDsCounter, 0 mSdLazyCounter, 834 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 778 SdHoareTripleChecker+Valid, 925 SdHoareTripleChecker+Invalid, 916 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 834 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-20 00:35:26,564 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [778 Valid, 925 Invalid, 916 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 834 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-20 00:35:26,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16996 states. [2023-12-20 00:35:27,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16996 to 14303. [2023-12-20 00:35:27,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14303 states, 11894 states have (on average 1.3632924163443754) internal successors, (16215), 12104 states have internal predecessors, (16215), 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) [2023-12-20 00:35:27,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14303 states to 14303 states and 20083 transitions. [2023-12-20 00:35:27,265 INFO L78 Accepts]: Start accepts. Automaton has 14303 states and 20083 transitions. Word has length 77 [2023-12-20 00:35:27,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 00:35:27,265 INFO L495 AbstractCegarLoop]: Abstraction has 14303 states and 20083 transitions. [2023-12-20 00:35:27,266 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) [2023-12-20 00:35:27,266 INFO L276 IsEmpty]: Start isEmpty. Operand 14303 states and 20083 transitions. [2023-12-20 00:35:27,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2023-12-20 00:35:27,269 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 00:35:27,269 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] [2023-12-20 00:35:27,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-12-20 00:35:27,269 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 00:35:27,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 00:35:27,269 INFO L85 PathProgramCache]: Analyzing trace with hash -725910813, now seen corresponding path program 1 times [2023-12-20 00:35:27,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 00:35:27,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284531672] [2023-12-20 00:35:27,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 00:35:27,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 00:35:27,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:27,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-20 00:35:27,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:27,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-20 00:35:27,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:27,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-12-20 00:35:27,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:27,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-12-20 00:35:27,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:27,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-12-20 00:35:27,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:27,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2023-12-20 00:35:27,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:27,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2023-12-20 00:35:27,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:27,350 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-20 00:35:27,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 00:35:27,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284531672] [2023-12-20 00:35:27,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284531672] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 00:35:27,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 00:35:27,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-12-20 00:35:27,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593431188] [2023-12-20 00:35:27,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 00:35:27,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-20 00:35:27,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 00:35:27,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-20 00:35:27,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-12-20 00:35:27,351 INFO L87 Difference]: Start difference. First operand 14303 states and 20083 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) [2023-12-20 00:35:28,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 00:35:28,732 INFO L93 Difference]: Finished difference Result 37271 states and 52445 transitions. [2023-12-20 00:35:28,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-12-20 00:35:28,732 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 [2023-12-20 00:35:28,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 00:35:28,781 INFO L225 Difference]: With dead ends: 37271 [2023-12-20 00:35:28,782 INFO L226 Difference]: Without dead ends: 24301 [2023-12-20 00:35:28,800 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2023-12-20 00:35:28,801 INFO L413 NwaCegarLoop]: 271 mSDtfsCounter, 839 mSDsluCounter, 977 mSDsCounter, 0 mSdLazyCounter, 1317 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 871 SdHoareTripleChecker+Valid, 1248 SdHoareTripleChecker+Invalid, 1428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 1317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-20 00:35:28,801 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [871 Valid, 1248 Invalid, 1428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 1317 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-20 00:35:28,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24301 states. [2023-12-20 00:35:29,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24301 to 20617. [2023-12-20 00:35:29,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20617 states, 17200 states have (on average 1.369767441860465) internal successors, (23560), 17480 states have internal predecessors, (23560), 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) [2023-12-20 00:35:29,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20617 states to 20617 states and 29112 transitions. [2023-12-20 00:35:29,552 INFO L78 Accepts]: Start accepts. Automaton has 20617 states and 29112 transitions. Word has length 80 [2023-12-20 00:35:29,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 00:35:29,553 INFO L495 AbstractCegarLoop]: Abstraction has 20617 states and 29112 transitions. [2023-12-20 00:35:29,553 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) [2023-12-20 00:35:29,553 INFO L276 IsEmpty]: Start isEmpty. Operand 20617 states and 29112 transitions. [2023-12-20 00:35:29,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-12-20 00:35:29,556 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 00:35:29,556 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] [2023-12-20 00:35:29,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-12-20 00:35:29,556 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 00:35:29,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 00:35:29,556 INFO L85 PathProgramCache]: Analyzing trace with hash 980379788, now seen corresponding path program 1 times [2023-12-20 00:35:29,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 00:35:29,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319165230] [2023-12-20 00:35:29,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 00:35:29,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 00:35:29,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:29,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-20 00:35:29,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:29,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-20 00:35:29,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:29,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-12-20 00:35:29,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:29,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-12-20 00:35:29,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:29,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-12-20 00:35:29,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:29,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2023-12-20 00:35:29,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:29,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2023-12-20 00:35:29,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:29,607 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-20 00:35:29,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 00:35:29,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319165230] [2023-12-20 00:35:29,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319165230] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 00:35:29,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 00:35:29,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-20 00:35:29,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248717585] [2023-12-20 00:35:29,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 00:35:29,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-20 00:35:29,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 00:35:29,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-20 00:35:29,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-20 00:35:29,609 INFO L87 Difference]: Start difference. First operand 20617 states and 29112 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) [2023-12-20 00:35:31,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 00:35:31,709 INFO L93 Difference]: Finished difference Result 62772 states and 90180 transitions. [2023-12-20 00:35:31,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-12-20 00:35:31,710 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 [2023-12-20 00:35:31,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 00:35:31,823 INFO L225 Difference]: With dead ends: 62772 [2023-12-20 00:35:31,823 INFO L226 Difference]: Without dead ends: 42169 [2023-12-20 00:35:31,868 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 [2023-12-20 00:35:31,868 INFO L413 NwaCegarLoop]: 206 mSDtfsCounter, 1073 mSDsluCounter, 612 mSDsCounter, 0 mSdLazyCounter, 683 mSolverCounterSat, 238 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1088 SdHoareTripleChecker+Valid, 818 SdHoareTripleChecker+Invalid, 921 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 238 IncrementalHoareTripleChecker+Valid, 683 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-20 00:35:31,869 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1088 Valid, 818 Invalid, 921 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [238 Valid, 683 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-20 00:35:31,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42169 states. [2023-12-20 00:35:33,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42169 to 39663. [2023-12-20 00:35:33,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39663 states, 32956 states have (on average 1.3404842820730671) internal successors, (44177), 33491 states have internal predecessors, (44177), 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) [2023-12-20 00:35:33,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39663 states to 39663 states and 55085 transitions. [2023-12-20 00:35:33,673 INFO L78 Accepts]: Start accepts. Automaton has 39663 states and 55085 transitions. Word has length 86 [2023-12-20 00:35:33,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 00:35:33,674 INFO L495 AbstractCegarLoop]: Abstraction has 39663 states and 55085 transitions. [2023-12-20 00:35:33,674 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) [2023-12-20 00:35:33,674 INFO L276 IsEmpty]: Start isEmpty. Operand 39663 states and 55085 transitions. [2023-12-20 00:35:33,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-12-20 00:35:33,681 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 00:35:33,681 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] [2023-12-20 00:35:33,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-12-20 00:35:33,681 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 00:35:33,682 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 00:35:33,682 INFO L85 PathProgramCache]: Analyzing trace with hash 1303924748, now seen corresponding path program 1 times [2023-12-20 00:35:33,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 00:35:33,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395887494] [2023-12-20 00:35:33,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 00:35:33,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 00:35:33,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:33,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-20 00:35:33,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:33,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-20 00:35:33,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:33,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-12-20 00:35:33,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:33,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-12-20 00:35:33,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:33,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-12-20 00:35:33,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:33,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2023-12-20 00:35:33,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:33,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2023-12-20 00:35:33,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:33,765 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-20 00:35:33,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 00:35:33,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395887494] [2023-12-20 00:35:33,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395887494] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 00:35:33,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801827071] [2023-12-20 00:35:33,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 00:35:33,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 00:35:33,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 00:35:33,767 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 00:35:33,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-20 00:35:33,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:33,836 INFO L262 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-20 00:35:33,843 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 00:35:33,931 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 00:35:33,932 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 00:35:34,061 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-20 00:35:34,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [801827071] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-20 00:35:34,062 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-20 00:35:34,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8, 6] total 15 [2023-12-20 00:35:34,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112281909] [2023-12-20 00:35:34,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 00:35:34,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-20 00:35:34,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 00:35:34,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-20 00:35:34,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2023-12-20 00:35:34,063 INFO L87 Difference]: Start difference. First operand 39663 states and 55085 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) [2023-12-20 00:35:35,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 00:35:35,691 INFO L93 Difference]: Finished difference Result 42099 states and 58169 transitions. [2023-12-20 00:35:35,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-20 00:35:35,692 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 [2023-12-20 00:35:35,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 00:35:35,791 INFO L225 Difference]: With dead ends: 42099 [2023-12-20 00:35:35,791 INFO L226 Difference]: Without dead ends: 42096 [2023-12-20 00:35:35,804 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 [2023-12-20 00:35:35,805 INFO L413 NwaCegarLoop]: 178 mSDtfsCounter, 375 mSDsluCounter, 610 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 381 SdHoareTripleChecker+Valid, 788 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 00:35:35,805 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [381 Valid, 788 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 00:35:35,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42096 states. [2023-12-20 00:35:37,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42096 to 40635. [2023-12-20 00:35:37,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40635 states, 33747 states have (on average 1.337155895338845) internal successors, (45125), 34300 states have internal predecessors, (45125), 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) [2023-12-20 00:35:37,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40635 states to 40635 states and 56286 transitions. [2023-12-20 00:35:37,685 INFO L78 Accepts]: Start accepts. Automaton has 40635 states and 56286 transitions. Word has length 87 [2023-12-20 00:35:37,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 00:35:37,685 INFO L495 AbstractCegarLoop]: Abstraction has 40635 states and 56286 transitions. [2023-12-20 00:35:37,685 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) [2023-12-20 00:35:37,685 INFO L276 IsEmpty]: Start isEmpty. Operand 40635 states and 56286 transitions. [2023-12-20 00:35:37,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-12-20 00:35:37,689 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 00:35:37,689 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] [2023-12-20 00:35:37,708 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-20 00:35:37,894 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 [2023-12-20 00:35:37,894 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 00:35:37,894 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 00:35:37,894 INFO L85 PathProgramCache]: Analyzing trace with hash 1824724012, now seen corresponding path program 1 times [2023-12-20 00:35:37,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 00:35:37,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450400339] [2023-12-20 00:35:37,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 00:35:37,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 00:35:37,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:37,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-20 00:35:37,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:37,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-20 00:35:37,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:37,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-12-20 00:35:37,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:37,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-12-20 00:35:37,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:37,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-12-20 00:35:37,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:37,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2023-12-20 00:35:37,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:37,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2023-12-20 00:35:37,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:37,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2023-12-20 00:35:37,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:37,961 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-20 00:35:37,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 00:35:37,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450400339] [2023-12-20 00:35:37,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450400339] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 00:35:37,961 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 00:35:37,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-20 00:35:37,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884943073] [2023-12-20 00:35:37,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 00:35:37,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-20 00:35:37,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 00:35:37,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-20 00:35:37,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-20 00:35:37,962 INFO L87 Difference]: Start difference. First operand 40635 states and 56286 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) [2023-12-20 00:35:39,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 00:35:39,952 INFO L93 Difference]: Finished difference Result 84591 states and 117108 transitions. [2023-12-20 00:35:39,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-20 00:35:39,953 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 [2023-12-20 00:35:39,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 00:35:40,075 INFO L225 Difference]: With dead ends: 84591 [2023-12-20 00:35:40,075 INFO L226 Difference]: Without dead ends: 43970 [2023-12-20 00:35:40,138 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 [2023-12-20 00:35:40,139 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 346 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 352 SdHoareTripleChecker+Valid, 442 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-20 00:35:40,139 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [352 Valid, 442 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-20 00:35:40,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43970 states. [2023-12-20 00:35:41,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43970 to 40579. [2023-12-20 00:35:41,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40579 states, 33579 states have (on average 1.3273474492986688) internal successors, (44571), 34244 states have internal predecessors, (44571), 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) [2023-12-20 00:35:41,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40579 states to 40579 states and 55284 transitions. [2023-12-20 00:35:41,813 INFO L78 Accepts]: Start accepts. Automaton has 40579 states and 55284 transitions. Word has length 89 [2023-12-20 00:35:41,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 00:35:41,814 INFO L495 AbstractCegarLoop]: Abstraction has 40579 states and 55284 transitions. [2023-12-20 00:35:41,814 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) [2023-12-20 00:35:41,814 INFO L276 IsEmpty]: Start isEmpty. Operand 40579 states and 55284 transitions. [2023-12-20 00:35:41,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-12-20 00:35:41,818 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 00:35:41,819 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] [2023-12-20 00:35:41,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-12-20 00:35:41,819 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 00:35:41,819 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 00:35:41,820 INFO L85 PathProgramCache]: Analyzing trace with hash -903485334, now seen corresponding path program 1 times [2023-12-20 00:35:41,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 00:35:41,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961618846] [2023-12-20 00:35:41,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 00:35:41,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 00:35:41,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:41,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-20 00:35:41,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:41,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-20 00:35:41,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:41,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-12-20 00:35:41,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:41,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-12-20 00:35:41,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:41,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-12-20 00:35:41,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:41,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2023-12-20 00:35:41,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:41,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2023-12-20 00:35:41,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:41,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2023-12-20 00:35:41,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:41,856 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-20 00:35:41,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 00:35:41,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961618846] [2023-12-20 00:35:41,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961618846] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 00:35:41,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 00:35:41,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-20 00:35:41,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402049783] [2023-12-20 00:35:41,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 00:35:41,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-20 00:35:41,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 00:35:41,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-20 00:35:41,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-20 00:35:41,858 INFO L87 Difference]: Start difference. First operand 40579 states and 55284 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) [2023-12-20 00:35:43,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 00:35:43,457 INFO L93 Difference]: Finished difference Result 45987 states and 62885 transitions. [2023-12-20 00:35:43,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-20 00:35:43,458 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 [2023-12-20 00:35:43,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 00:35:43,549 INFO L225 Difference]: With dead ends: 45987 [2023-12-20 00:35:43,550 INFO L226 Difference]: Without dead ends: 43767 [2023-12-20 00:35:43,566 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 [2023-12-20 00:35:43,566 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 288 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 00:35:43,566 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [304 Valid, 252 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 00:35:43,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43767 states. [2023-12-20 00:35:45,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43767 to 40433. [2023-12-20 00:35:45,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40433 states, 33463 states have (on average 1.3276454591638527) internal successors, (44427), 34126 states have internal predecessors, (44427), 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) [2023-12-20 00:35:45,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40433 states to 40433 states and 55100 transitions. [2023-12-20 00:35:45,243 INFO L78 Accepts]: Start accepts. Automaton has 40433 states and 55100 transitions. Word has length 89 [2023-12-20 00:35:45,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 00:35:45,243 INFO L495 AbstractCegarLoop]: Abstraction has 40433 states and 55100 transitions. [2023-12-20 00:35:45,243 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) [2023-12-20 00:35:45,243 INFO L276 IsEmpty]: Start isEmpty. Operand 40433 states and 55100 transitions. [2023-12-20 00:35:45,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-12-20 00:35:45,247 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 00:35:45,247 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] [2023-12-20 00:35:45,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-12-20 00:35:45,247 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 00:35:45,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 00:35:45,248 INFO L85 PathProgramCache]: Analyzing trace with hash 344553963, now seen corresponding path program 1 times [2023-12-20 00:35:45,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 00:35:45,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606181155] [2023-12-20 00:35:45,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 00:35:45,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 00:35:45,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:45,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-20 00:35:45,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:45,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-20 00:35:45,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:45,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-12-20 00:35:45,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:45,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-12-20 00:35:45,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:45,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-12-20 00:35:45,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:45,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2023-12-20 00:35:45,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:45,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2023-12-20 00:35:45,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:45,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2023-12-20 00:35:45,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:45,298 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-20 00:35:45,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 00:35:45,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606181155] [2023-12-20 00:35:45,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606181155] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 00:35:45,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 00:35:45,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-20 00:35:45,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60959210] [2023-12-20 00:35:45,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 00:35:45,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-20 00:35:45,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 00:35:45,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-20 00:35:45,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-20 00:35:45,299 INFO L87 Difference]: Start difference. First operand 40433 states and 55100 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) [2023-12-20 00:35:47,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 00:35:47,516 INFO L93 Difference]: Finished difference Result 83379 states and 113683 transitions. [2023-12-20 00:35:47,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-12-20 00:35:47,517 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 [2023-12-20 00:35:47,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 00:35:47,594 INFO L225 Difference]: With dead ends: 83379 [2023-12-20 00:35:47,594 INFO L226 Difference]: Without dead ends: 42956 [2023-12-20 00:35:47,630 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 [2023-12-20 00:35:47,631 INFO L413 NwaCegarLoop]: 202 mSDtfsCounter, 1154 mSDsluCounter, 587 mSDsCounter, 0 mSdLazyCounter, 684 mSolverCounterSat, 222 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1169 SdHoareTripleChecker+Valid, 789 SdHoareTripleChecker+Invalid, 906 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 222 IncrementalHoareTripleChecker+Valid, 684 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-20 00:35:47,631 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1169 Valid, 789 Invalid, 906 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [222 Valid, 684 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-20 00:35:47,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42956 states. [2023-12-20 00:35:49,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42956 to 40548. [2023-12-20 00:35:49,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40548 states, 33578 states have (on average 1.3185716838406099) internal successors, (44275), 34241 states have internal predecessors, (44275), 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) [2023-12-20 00:35:49,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40548 states to 40548 states and 54612 transitions. [2023-12-20 00:35:49,282 INFO L78 Accepts]: Start accepts. Automaton has 40548 states and 54612 transitions. Word has length 90 [2023-12-20 00:35:49,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 00:35:49,282 INFO L495 AbstractCegarLoop]: Abstraction has 40548 states and 54612 transitions. [2023-12-20 00:35:49,282 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) [2023-12-20 00:35:49,282 INFO L276 IsEmpty]: Start isEmpty. Operand 40548 states and 54612 transitions. [2023-12-20 00:35:49,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2023-12-20 00:35:49,289 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 00:35:49,289 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] [2023-12-20 00:35:49,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-12-20 00:35:49,290 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 00:35:49,290 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 00:35:49,290 INFO L85 PathProgramCache]: Analyzing trace with hash 1398325679, now seen corresponding path program 1 times [2023-12-20 00:35:49,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 00:35:49,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412698162] [2023-12-20 00:35:49,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 00:35:49,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 00:35:49,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:49,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-20 00:35:49,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:49,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-20 00:35:49,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:49,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-12-20 00:35:49,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:49,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-12-20 00:35:49,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:49,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-12-20 00:35:49,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:49,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2023-12-20 00:35:49,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:49,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2023-12-20 00:35:49,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:49,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2023-12-20 00:35:49,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:49,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2023-12-20 00:35:49,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:49,329 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-12-20 00:35:49,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 00:35:49,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412698162] [2023-12-20 00:35:49,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412698162] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 00:35:49,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 00:35:49,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-20 00:35:49,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283918560] [2023-12-20 00:35:49,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 00:35:49,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-20 00:35:49,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 00:35:49,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-20 00:35:49,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-20 00:35:49,331 INFO L87 Difference]: Start difference. First operand 40548 states and 54612 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) [2023-12-20 00:35:52,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 00:35:52,037 INFO L93 Difference]: Finished difference Result 109695 states and 148767 transitions. [2023-12-20 00:35:52,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-20 00:35:52,040 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 [2023-12-20 00:35:52,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 00:35:52,197 INFO L225 Difference]: With dead ends: 109695 [2023-12-20 00:35:52,197 INFO L226 Difference]: Without dead ends: 70133 [2023-12-20 00:35:52,259 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 [2023-12-20 00:35:52,260 INFO L413 NwaCegarLoop]: 134 mSDtfsCounter, 365 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 374 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-20 00:35:52,261 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [374 Valid, 376 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-20 00:35:52,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70133 states. [2023-12-20 00:35:54,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70133 to 64470. [2023-12-20 00:35:55,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64470 states, 53574 states have (on average 1.3235898010228841) internal successors, (70910), 54650 states have internal predecessors, (70910), 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) [2023-12-20 00:35:55,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64470 states to 64470 states and 86967 transitions. [2023-12-20 00:35:55,204 INFO L78 Accepts]: Start accepts. Automaton has 64470 states and 86967 transitions. Word has length 109 [2023-12-20 00:35:55,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 00:35:55,204 INFO L495 AbstractCegarLoop]: Abstraction has 64470 states and 86967 transitions. [2023-12-20 00:35:55,204 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) [2023-12-20 00:35:55,204 INFO L276 IsEmpty]: Start isEmpty. Operand 64470 states and 86967 transitions. [2023-12-20 00:35:55,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2023-12-20 00:35:55,216 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 00:35:55,216 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] [2023-12-20 00:35:55,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-12-20 00:35:55,217 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 00:35:55,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 00:35:55,217 INFO L85 PathProgramCache]: Analyzing trace with hash -662581811, now seen corresponding path program 1 times [2023-12-20 00:35:55,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 00:35:55,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954514437] [2023-12-20 00:35:55,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 00:35:55,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 00:35:55,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:55,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-20 00:35:55,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:55,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-20 00:35:55,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:55,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-12-20 00:35:55,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:55,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-12-20 00:35:55,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:55,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-12-20 00:35:55,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:55,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2023-12-20 00:35:55,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:55,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2023-12-20 00:35:55,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:55,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2023-12-20 00:35:55,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:55,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2023-12-20 00:35:55,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:55,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2023-12-20 00:35:55,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:55,293 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 21 proven. 13 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-12-20 00:35:55,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 00:35:55,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954514437] [2023-12-20 00:35:55,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954514437] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 00:35:55,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964495781] [2023-12-20 00:35:55,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 00:35:55,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 00:35:55,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 00:35:55,295 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 00:35:55,328 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-20 00:35:55,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:35:55,392 INFO L262 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-20 00:35:55,394 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 00:35:55,468 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-20 00:35:55,468 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-20 00:35:55,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964495781] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 00:35:55,468 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-20 00:35:55,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [8] total 9 [2023-12-20 00:35:55,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641257589] [2023-12-20 00:35:55,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 00:35:55,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-20 00:35:55,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 00:35:55,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-20 00:35:55,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2023-12-20 00:35:55,469 INFO L87 Difference]: Start difference. First operand 64470 states and 86967 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) [2023-12-20 00:35:59,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 00:35:59,066 INFO L93 Difference]: Finished difference Result 143220 states and 192001 transitions. [2023-12-20 00:35:59,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-20 00:35:59,067 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 [2023-12-20 00:35:59,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 00:35:59,284 INFO L225 Difference]: With dead ends: 143220 [2023-12-20 00:35:59,284 INFO L226 Difference]: Without dead ends: 92838 [2023-12-20 00:35:59,349 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 [2023-12-20 00:35:59,350 INFO L413 NwaCegarLoop]: 170 mSDtfsCounter, 78 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 00:35:59,350 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 312 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 00:35:59,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92838 states. [2023-12-20 00:36:03,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92838 to 92833. [2023-12-20 00:36:03,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92833 states, 76773 states have (on average 1.3076732705508447) internal successors, (100394), 78275 states have internal predecessors, (100394), 8954 states have call successors, (8954), 5826 states have call predecessors, (8954), 7105 states have return successors, (13362), 8732 states have call predecessors, (13362), 8951 states have call successors, (13362) [2023-12-20 00:36:03,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92833 states to 92833 states and 122710 transitions. [2023-12-20 00:36:03,431 INFO L78 Accepts]: Start accepts. Automaton has 92833 states and 122710 transitions. Word has length 125 [2023-12-20 00:36:03,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 00:36:03,431 INFO L495 AbstractCegarLoop]: Abstraction has 92833 states and 122710 transitions. [2023-12-20 00:36:03,431 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) [2023-12-20 00:36:03,431 INFO L276 IsEmpty]: Start isEmpty. Operand 92833 states and 122710 transitions. [2023-12-20 00:36:03,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2023-12-20 00:36:03,463 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 00:36:03,480 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] [2023-12-20 00:36:03,487 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-20 00:36:03,685 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 [2023-12-20 00:36:03,685 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 00:36:03,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 00:36:03,685 INFO L85 PathProgramCache]: Analyzing trace with hash 1937350065, now seen corresponding path program 1 times [2023-12-20 00:36:03,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 00:36:03,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463818802] [2023-12-20 00:36:03,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 00:36:03,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 00:36:03,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:36:03,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-20 00:36:03,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:36:03,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-20 00:36:03,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:36:03,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-12-20 00:36:03,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:36:03,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-12-20 00:36:03,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:36:03,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-12-20 00:36:03,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:36:03,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2023-12-20 00:36:03,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:36:03,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2023-12-20 00:36:03,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:36:03,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2023-12-20 00:36:03,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:36:03,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2023-12-20 00:36:03,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:36:03,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2023-12-20 00:36:03,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:36:03,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2023-12-20 00:36:03,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:36:03,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2023-12-20 00:36:03,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:36:03,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2023-12-20 00:36:03,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:36:03,753 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-12-20 00:36:03,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 00:36:03,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463818802] [2023-12-20 00:36:03,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463818802] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 00:36:03,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664061969] [2023-12-20 00:36:03,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 00:36:03,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 00:36:03,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 00:36:03,754 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 00:36:03,782 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-20 00:36:03,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:36:03,822 INFO L262 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-20 00:36:03,825 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 00:36:03,906 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-12-20 00:36:03,907 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-20 00:36:03,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664061969] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 00:36:03,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-20 00:36:03,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [8] total 9 [2023-12-20 00:36:03,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461009120] [2023-12-20 00:36:03,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 00:36:03,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-20 00:36:03,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 00:36:03,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-20 00:36:03,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-12-20 00:36:03,908 INFO L87 Difference]: Start difference. First operand 92833 states and 122710 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) [2023-12-20 00:36:10,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 00:36:10,629 INFO L93 Difference]: Finished difference Result 266725 states and 358126 transitions. [2023-12-20 00:36:10,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-20 00:36:10,630 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 [2023-12-20 00:36:10,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 00:36:11,198 INFO L225 Difference]: With dead ends: 266725 [2023-12-20 00:36:11,198 INFO L226 Difference]: Without dead ends: 179659 [2023-12-20 00:36:11,318 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 [2023-12-20 00:36:11,318 INFO L413 NwaCegarLoop]: 168 mSDtfsCounter, 101 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 00:36:11,319 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 310 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 00:36:11,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179659 states. [2023-12-20 00:36:18,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179659 to 178189. [2023-12-20 00:36:18,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178189 states, 147545 states have (on average 1.3024162120031177) internal successors, (192165), 150478 states have internal predecessors, (192165), 17005 states have call successors, (17005), 11135 states have call predecessors, (17005), 13638 states have return successors, (25238), 16576 states have call predecessors, (25238), 17002 states have call successors, (25238) [2023-12-20 00:36:19,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178189 states to 178189 states and 234408 transitions. [2023-12-20 00:36:19,274 INFO L78 Accepts]: Start accepts. Automaton has 178189 states and 234408 transitions. Word has length 128 [2023-12-20 00:36:19,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 00:36:19,274 INFO L495 AbstractCegarLoop]: Abstraction has 178189 states and 234408 transitions. [2023-12-20 00:36:19,274 INFO L496 AbstractCegarLoop]: INTERPOLANT 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) [2023-12-20 00:36:19,274 INFO L276 IsEmpty]: Start isEmpty. Operand 178189 states and 234408 transitions. [2023-12-20 00:36:19,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2023-12-20 00:36:19,284 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 00:36:19,284 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, 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] [2023-12-20 00:36:19,291 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-12-20 00:36:19,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-12-20 00:36:19,489 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 00:36:19,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 00:36:19,489 INFO L85 PathProgramCache]: Analyzing trace with hash -182586181, now seen corresponding path program 1 times [2023-12-20 00:36:19,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 00:36:19,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500666149] [2023-12-20 00:36:19,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 00:36:19,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 00:36:19,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:36:19,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-20 00:36:19,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:36:19,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-20 00:36:19,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:36:19,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-12-20 00:36:19,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:36:19,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-12-20 00:36:19,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:36:19,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-12-20 00:36:19,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:36:19,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2023-12-20 00:36:19,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:36:19,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2023-12-20 00:36:19,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:36:19,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2023-12-20 00:36:19,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:36:19,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2023-12-20 00:36:19,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:36:19,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2023-12-20 00:36:19,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:36:19,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2023-12-20 00:36:19,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:36:19,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2023-12-20 00:36:19,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:36:19,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2023-12-20 00:36:19,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:36:19,569 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-12-20 00:36:19,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 00:36:19,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500666149] [2023-12-20 00:36:19,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500666149] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 00:36:19,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611957241] [2023-12-20 00:36:19,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 00:36:19,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 00:36:19,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 00:36:19,571 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 00:36:19,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-20 00:36:19,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:36:19,651 INFO L262 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-20 00:36:19,653 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 00:36:19,726 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-12-20 00:36:19,726 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-20 00:36:19,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611957241] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 00:36:19,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-20 00:36:19,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [8] total 9 [2023-12-20 00:36:19,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709306101] [2023-12-20 00:36:19,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 00:36:19,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-20 00:36:19,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 00:36:19,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-20 00:36:19,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-12-20 00:36:19,727 INFO L87 Difference]: Start difference. First operand 178189 states and 234408 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) [2023-12-20 00:36:26,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 00:36:26,742 INFO L93 Difference]: Finished difference Result 331819 states and 439243 transitions. [2023-12-20 00:36:26,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-20 00:36:26,743 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 129 [2023-12-20 00:36:26,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 00:36:27,261 INFO L225 Difference]: With dead ends: 331819 [2023-12-20 00:36:27,261 INFO L226 Difference]: Without dead ends: 159397 [2023-12-20 00:36:27,455 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-12-20 00:36:27,455 INFO L413 NwaCegarLoop]: 170 mSDtfsCounter, 89 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-20 00:36:27,455 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 312 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-20 00:36:27,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159397 states.