/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.use.bitabs.translation false -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/loops/vogal-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-21 04:06:37,941 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-21 04:06:37,998 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-12-21 04:06:38,002 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-21 04:06:38,003 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-21 04:06:38,028 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-21 04:06:38,028 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-21 04:06:38,029 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-21 04:06:38,029 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-21 04:06:38,032 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-21 04:06:38,032 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-21 04:06:38,032 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-21 04:06:38,033 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-21 04:06:38,034 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-21 04:06:38,034 INFO L153 SettingsManager]: * Use SBE=true [2023-12-21 04:06:38,034 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-21 04:06:38,034 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-21 04:06:38,034 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-21 04:06:38,035 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-21 04:06:38,035 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-21 04:06:38,036 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-21 04:06:38,036 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-21 04:06:38,036 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-21 04:06:38,036 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-21 04:06:38,036 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-21 04:06:38,036 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-21 04:06:38,036 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-21 04:06:38,037 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-21 04:06:38,037 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-21 04:06:38,037 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-21 04:06:38,038 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-21 04:06:38,038 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-21 04:06:38,038 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-21 04:06:38,038 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-21 04:06:38,038 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-21 04:06:38,038 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-21 04:06:38,038 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-21 04:06:38,039 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-21 04:06:38,039 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-21 04:06:38,039 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-21 04:06:38,039 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-21 04:06:38,039 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-21 04:06:38,039 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-21 04:06:38,039 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> false [2023-12-21 04:06:38,222 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-21 04:06:38,236 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-21 04:06:38,237 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-21 04:06:38,238 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-21 04:06:38,238 INFO L274 PluginConnector]: CDTParser initialized [2023-12-21 04:06:38,239 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/vogal-1.i [2023-12-21 04:06:39,229 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-21 04:06:39,355 INFO L384 CDTParser]: Found 1 translation units. [2023-12-21 04:06:39,355 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/vogal-1.i [2023-12-21 04:06:39,360 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/272cee0ea/3c5f3605005040a28670237fa7d4452e/FLAG59ee12b4f [2023-12-21 04:06:39,369 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/272cee0ea/3c5f3605005040a28670237fa7d4452e [2023-12-21 04:06:39,371 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-21 04:06:39,372 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-21 04:06:39,372 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-21 04:06:39,372 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-21 04:06:39,378 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-21 04:06:39,379 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 04:06:39" (1/1) ... [2023-12-21 04:06:39,379 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39d34044 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:06:39, skipping insertion in model container [2023-12-21 04:06:39,379 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 04:06:39" (1/1) ... [2023-12-21 04:06:39,399 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-21 04:06:39,528 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/vogal-1.i[895,908] [2023-12-21 04:06:39,563 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-21 04:06:39,570 INFO L202 MainTranslator]: Completed pre-run [2023-12-21 04:06:39,580 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/vogal-1.i[895,908] [2023-12-21 04:06:39,605 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-21 04:06:39,614 INFO L206 MainTranslator]: Completed translation [2023-12-21 04:06:39,615 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:06:39 WrapperNode [2023-12-21 04:06:39,615 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-21 04:06:39,616 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-21 04:06:39,619 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-21 04:06:39,619 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-21 04:06:39,624 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:06:39" (1/1) ... [2023-12-21 04:06:39,635 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:06:39" (1/1) ... [2023-12-21 04:06:39,661 INFO L138 Inliner]: procedures = 17, calls = 34, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 129 [2023-12-21 04:06:39,662 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-21 04:06:39,662 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-21 04:06:39,663 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-21 04:06:39,663 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-21 04:06:39,670 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:06:39" (1/1) ... [2023-12-21 04:06:39,670 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:06:39" (1/1) ... [2023-12-21 04:06:39,682 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:06:39" (1/1) ... [2023-12-21 04:06:39,698 INFO L175 MemorySlicer]: Split 21 memory accesses to 3 slices as follows [2, 13, 6]. 62 percent of accesses are in the largest equivalence class. The 13 initializations are split as follows [2, 11, 0]. The 1 writes are split as follows [0, 0, 1]. [2023-12-21 04:06:39,699 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:06:39" (1/1) ... [2023-12-21 04:06:39,699 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:06:39" (1/1) ... [2023-12-21 04:06:39,706 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:06:39" (1/1) ... [2023-12-21 04:06:39,708 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:06:39" (1/1) ... [2023-12-21 04:06:39,709 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:06:39" (1/1) ... [2023-12-21 04:06:39,710 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:06:39" (1/1) ... [2023-12-21 04:06:39,711 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-21 04:06:39,711 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-21 04:06:39,712 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-21 04:06:39,712 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-21 04:06:39,712 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:06:39" (1/1) ... [2023-12-21 04:06:39,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-21 04:06:39,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:06:39,734 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-12-21 04:06:39,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-12-21 04:06:39,759 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-21 04:06:39,759 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-21 04:06:39,759 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-12-21 04:06:39,759 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-12-21 04:06:39,760 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-21 04:06:39,760 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-12-21 04:06:39,760 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-12-21 04:06:39,760 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-12-21 04:06:39,760 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-21 04:06:39,760 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-21 04:06:39,760 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-12-21 04:06:39,760 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-12-21 04:06:39,760 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-12-21 04:06:39,760 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-21 04:06:39,818 INFO L241 CfgBuilder]: Building ICFG [2023-12-21 04:06:39,820 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-21 04:06:39,956 INFO L282 CfgBuilder]: Performing block encoding [2023-12-21 04:06:39,975 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-21 04:06:39,975 INFO L309 CfgBuilder]: Removed 6 assume(true) statements. [2023-12-21 04:06:39,975 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 04:06:39 BoogieIcfgContainer [2023-12-21 04:06:39,975 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-21 04:06:39,977 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-21 04:06:39,977 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-21 04:06:39,979 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-21 04:06:39,979 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 04:06:39" (1/3) ... [2023-12-21 04:06:39,979 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cd0e480 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 04:06:39, skipping insertion in model container [2023-12-21 04:06:39,979 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:06:39" (2/3) ... [2023-12-21 04:06:39,979 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cd0e480 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 04:06:39, skipping insertion in model container [2023-12-21 04:06:39,980 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 04:06:39" (3/3) ... [2023-12-21 04:06:39,980 INFO L112 eAbstractionObserver]: Analyzing ICFG vogal-1.i [2023-12-21 04:06:39,992 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-21 04:06:39,992 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-21 04:06:40,021 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-21 04:06:40,031 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;@56fbbe76, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-21 04:06:40,032 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-21 04:06:40,034 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:06:40,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-12-21 04:06:40,038 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:06:40,038 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:06:40,039 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:06:40,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:06:40,042 INFO L85 PathProgramCache]: Analyzing trace with hash -1993292477, now seen corresponding path program 1 times [2023-12-21 04:06:40,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:06:40,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701028361] [2023-12-21 04:06:40,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:06:40,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:06:40,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:06:40,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 04:06:40,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:06:40,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701028361] [2023-12-21 04:06:40,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701028361] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 04:06:40,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 04:06:40,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-21 04:06:40,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123848164] [2023-12-21 04:06:40,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 04:06:40,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-21 04:06:40,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:06:40,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-21 04:06:40,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-21 04:06:40,208 INFO L87 Difference]: Start difference. First operand has 26 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:06:40,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:06:40,226 INFO L93 Difference]: Finished difference Result 50 states and 78 transitions. [2023-12-21 04:06:40,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-21 04:06:40,229 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-12-21 04:06:40,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:06:40,233 INFO L225 Difference]: With dead ends: 50 [2023-12-21 04:06:40,233 INFO L226 Difference]: Without dead ends: 23 [2023-12-21 04:06:40,236 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-21 04:06:40,238 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 04:06:40,239 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 31 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 04:06:40,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-12-21 04:06:40,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2023-12-21 04:06:40,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:06:40,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 30 transitions. [2023-12-21 04:06:40,258 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 30 transitions. Word has length 12 [2023-12-21 04:06:40,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:06:40,258 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 30 transitions. [2023-12-21 04:06:40,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:06:40,258 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 30 transitions. [2023-12-21 04:06:40,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-12-21 04:06:40,259 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:06:40,259 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:06:40,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-21 04:06:40,259 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:06:40,259 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:06:40,260 INFO L85 PathProgramCache]: Analyzing trace with hash -1292082620, now seen corresponding path program 1 times [2023-12-21 04:06:40,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:06:40,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62502966] [2023-12-21 04:06:40,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:06:40,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:06:40,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:06:40,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 04:06:40,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:06:40,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62502966] [2023-12-21 04:06:40,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62502966] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 04:06:40,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 04:06:40,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-21 04:06:40,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631049203] [2023-12-21 04:06:40,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 04:06:40,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-21 04:06:40,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:06:40,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-21 04:06:40,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-21 04:06:40,381 INFO L87 Difference]: Start difference. First operand 23 states and 30 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:06:40,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:06:40,410 INFO L93 Difference]: Finished difference Result 61 states and 80 transitions. [2023-12-21 04:06:40,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-21 04:06:40,412 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-12-21 04:06:40,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:06:40,413 INFO L225 Difference]: With dead ends: 61 [2023-12-21 04:06:40,413 INFO L226 Difference]: Without dead ends: 40 [2023-12-21 04:06:40,413 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-21 04:06:40,414 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 18 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 04:06:40,414 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 39 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 04:06:40,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-12-21 04:06:40,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 24. [2023-12-21 04:06:40,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 23 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:06:40,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 31 transitions. [2023-12-21 04:06:40,418 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 31 transitions. Word has length 14 [2023-12-21 04:06:40,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:06:40,418 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 31 transitions. [2023-12-21 04:06:40,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:06:40,418 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 31 transitions. [2023-12-21 04:06:40,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-12-21 04:06:40,418 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:06:40,419 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:06:40,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-21 04:06:40,419 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:06:40,419 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:06:40,419 INFO L85 PathProgramCache]: Analyzing trace with hash 2049006260, now seen corresponding path program 1 times [2023-12-21 04:06:40,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:06:40,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859317862] [2023-12-21 04:06:40,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:06:40,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:06:40,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:06:40,545 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 04:06:40,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:06:40,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859317862] [2023-12-21 04:06:40,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859317862] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:06:40,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417691772] [2023-12-21 04:06:40,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:06:40,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:06:40,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:06:40,548 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 04:06:40,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-21 04:06:40,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:06:40,608 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-21 04:06:40,610 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:06:40,649 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-21 04:06:40,649 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-21 04:06:40,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417691772] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 04:06:40,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-21 04:06:40,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [3] total 7 [2023-12-21 04:06:40,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039283583] [2023-12-21 04:06:40,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 04:06:40,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-21 04:06:40,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:06:40,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-21 04:06:40,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-12-21 04:06:40,651 INFO L87 Difference]: Start difference. First operand 24 states and 31 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:06:40,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:06:40,696 INFO L93 Difference]: Finished difference Result 50 states and 64 transitions. [2023-12-21 04:06:40,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-21 04:06:40,697 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-12-21 04:06:40,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:06:40,697 INFO L225 Difference]: With dead ends: 50 [2023-12-21 04:06:40,697 INFO L226 Difference]: Without dead ends: 46 [2023-12-21 04:06:40,698 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-12-21 04:06:40,698 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 32 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 04:06:40,699 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 98 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 04:06:40,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2023-12-21 04:06:40,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 36. [2023-12-21 04:06:40,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.3714285714285714) internal successors, (48), 35 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:06:40,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 48 transitions. [2023-12-21 04:06:40,703 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 48 transitions. Word has length 15 [2023-12-21 04:06:40,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:06:40,703 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 48 transitions. [2023-12-21 04:06:40,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:06:40,703 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 48 transitions. [2023-12-21 04:06:40,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-12-21 04:06:40,704 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:06:40,704 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] [2023-12-21 04:06:40,711 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-21 04:06:40,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:06:40,904 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:06:40,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:06:40,905 INFO L85 PathProgramCache]: Analyzing trace with hash 1097083643, now seen corresponding path program 1 times [2023-12-21 04:06:40,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:06:40,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977959530] [2023-12-21 04:06:40,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:06:40,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:06:40,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:06:41,034 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-21 04:06:41,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:06:41,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977959530] [2023-12-21 04:06:41,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977959530] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:06:41,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587523487] [2023-12-21 04:06:41,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:06:41,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:06:41,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:06:41,039 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 04:06:41,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-21 04:06:41,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:06:41,108 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-21 04:06:41,110 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:06:41,133 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-21 04:06:41,134 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-21 04:06:41,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587523487] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 04:06:41,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-21 04:06:41,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3] total 6 [2023-12-21 04:06:41,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208286431] [2023-12-21 04:06:41,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 04:06:41,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-21 04:06:41,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:06:41,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-21 04:06:41,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-12-21 04:06:41,139 INFO L87 Difference]: Start difference. First operand 36 states and 48 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:06:41,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:06:41,174 INFO L93 Difference]: Finished difference Result 95 states and 127 transitions. [2023-12-21 04:06:41,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-21 04:06:41,175 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2023-12-21 04:06:41,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:06:41,177 INFO L225 Difference]: With dead ends: 95 [2023-12-21 04:06:41,177 INFO L226 Difference]: Without dead ends: 67 [2023-12-21 04:06:41,178 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-12-21 04:06:41,179 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 30 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 04:06:41,180 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 55 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 04:06:41,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2023-12-21 04:06:41,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 40. [2023-12-21 04:06:41,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.358974358974359) internal successors, (53), 39 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:06:41,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 53 transitions. [2023-12-21 04:06:41,187 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 53 transitions. Word has length 21 [2023-12-21 04:06:41,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:06:41,187 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 53 transitions. [2023-12-21 04:06:41,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:06:41,188 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 53 transitions. [2023-12-21 04:06:41,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-12-21 04:06:41,188 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:06:41,188 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] [2023-12-21 04:06:41,198 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-21 04:06:41,393 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,SelfDestructingSolverStorable3 [2023-12-21 04:06:41,393 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:06:41,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:06:41,394 INFO L85 PathProgramCache]: Analyzing trace with hash -1110837872, now seen corresponding path program 1 times [2023-12-21 04:06:41,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:06:41,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750477343] [2023-12-21 04:06:41,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:06:41,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:06:41,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:06:41,497 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-21 04:06:41,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:06:41,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750477343] [2023-12-21 04:06:41,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750477343] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:06:41,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540191030] [2023-12-21 04:06:41,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:06:41,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:06:41,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:06:41,499 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 04:06:41,503 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-21 04:06:41,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:06:41,551 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 18 conjunts are in the unsatisfiable core [2023-12-21 04:06:41,554 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:06:41,604 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-21 04:06:41,682 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-21 04:06:41,682 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 04:06:41,809 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-21 04:06:41,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540191030] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-21 04:06:41,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-21 04:06:41,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [3, 8] total 15 [2023-12-21 04:06:41,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110180320] [2023-12-21 04:06:41,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 04:06:41,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-21 04:06:41,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:06:41,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-21 04:06:41,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2023-12-21 04:06:41,811 INFO L87 Difference]: Start difference. First operand 40 states and 53 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:06:41,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:06:41,911 INFO L93 Difference]: Finished difference Result 59 states and 76 transitions. [2023-12-21 04:06:41,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-21 04:06:41,912 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2023-12-21 04:06:41,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:06:41,914 INFO L225 Difference]: With dead ends: 59 [2023-12-21 04:06:41,916 INFO L226 Difference]: Without dead ends: 38 [2023-12-21 04:06:41,916 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2023-12-21 04:06:41,919 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 5 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 04:06:41,920 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 120 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 04:06:41,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-12-21 04:06:41,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2023-12-21 04:06:41,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.3513513513513513) internal successors, (50), 37 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:06:41,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 50 transitions. [2023-12-21 04:06:41,929 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 50 transitions. Word has length 22 [2023-12-21 04:06:41,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:06:41,930 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 50 transitions. [2023-12-21 04:06:41,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:06:41,930 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 50 transitions. [2023-12-21 04:06:41,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-12-21 04:06:41,931 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:06:41,931 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] [2023-12-21 04:06:41,937 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-21 04:06:42,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:06:42,136 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:06:42,136 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:06:42,136 INFO L85 PathProgramCache]: Analyzing trace with hash -2036955776, now seen corresponding path program 1 times [2023-12-21 04:06:42,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:06:42,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991051810] [2023-12-21 04:06:42,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:06:42,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:06:42,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:06:42,209 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-21 04:06:42,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:06:42,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991051810] [2023-12-21 04:06:42,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991051810] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:06:42,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662745533] [2023-12-21 04:06:42,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:06:42,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:06:42,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:06:42,211 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 04:06:42,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-21 04:06:42,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:06:42,274 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 18 conjunts are in the unsatisfiable core [2023-12-21 04:06:42,275 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:06:42,285 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-21 04:06:42,355 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2023-12-21 04:06:42,361 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-21 04:06:42,361 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 04:06:42,451 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-21 04:06:42,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662745533] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-21 04:06:42,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-21 04:06:42,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [3, 8] total 15 [2023-12-21 04:06:42,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923303416] [2023-12-21 04:06:42,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 04:06:42,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-21 04:06:42,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:06:42,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-21 04:06:42,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2023-12-21 04:06:42,453 INFO L87 Difference]: Start difference. First operand 38 states and 50 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:06:42,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:06:42,556 INFO L93 Difference]: Finished difference Result 64 states and 85 transitions. [2023-12-21 04:06:42,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-21 04:06:42,556 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2023-12-21 04:06:42,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:06:42,557 INFO L225 Difference]: With dead ends: 64 [2023-12-21 04:06:42,557 INFO L226 Difference]: Without dead ends: 60 [2023-12-21 04:06:42,557 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2023-12-21 04:06:42,557 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 63 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 04:06:42,558 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 56 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 04:06:42,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-12-21 04:06:42,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 40. [2023-12-21 04:06:42,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.3333333333333333) internal successors, (52), 39 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:06:42,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 52 transitions. [2023-12-21 04:06:42,563 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 52 transitions. Word has length 23 [2023-12-21 04:06:42,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:06:42,563 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 52 transitions. [2023-12-21 04:06:42,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:06:42,563 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 52 transitions. [2023-12-21 04:06:42,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-12-21 04:06:42,563 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:06:42,563 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] [2023-12-21 04:06:42,568 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-21 04:06:42,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:06:42,769 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:06:42,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:06:42,769 INFO L85 PathProgramCache]: Analyzing trace with hash 518187947, now seen corresponding path program 1 times [2023-12-21 04:06:42,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:06:42,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598503437] [2023-12-21 04:06:42,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:06:42,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:06:42,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:06:42,840 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-21 04:06:42,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:06:42,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598503437] [2023-12-21 04:06:42,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598503437] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:06:42,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879639162] [2023-12-21 04:06:42,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:06:42,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:06:42,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:06:42,842 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 04:06:42,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-21 04:06:42,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:06:42,894 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 15 conjunts are in the unsatisfiable core [2023-12-21 04:06:42,895 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:06:42,903 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-21 04:06:42,903 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 04:06:42,924 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-21 04:06:42,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879639162] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 04:06:42,925 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 04:06:42,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 5] total 8 [2023-12-21 04:06:42,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68583196] [2023-12-21 04:06:42,925 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 04:06:42,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-21 04:06:42,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:06:42,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-21 04:06:42,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-12-21 04:06:42,927 INFO L87 Difference]: Start difference. First operand 40 states and 52 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:06:43,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:06:43,083 INFO L93 Difference]: Finished difference Result 216 states and 285 transitions. [2023-12-21 04:06:43,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-12-21 04:06:43,083 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2023-12-21 04:06:43,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:06:43,084 INFO L225 Difference]: With dead ends: 216 [2023-12-21 04:06:43,084 INFO L226 Difference]: Without dead ends: 179 [2023-12-21 04:06:43,085 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2023-12-21 04:06:43,085 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 221 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-21 04:06:43,086 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [221 Valid, 175 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-21 04:06:43,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2023-12-21 04:06:43,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 45. [2023-12-21 04:06:43,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.3181818181818181) internal successors, (58), 44 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:06:43,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 58 transitions. [2023-12-21 04:06:43,096 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 58 transitions. Word has length 24 [2023-12-21 04:06:43,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:06:43,096 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 58 transitions. [2023-12-21 04:06:43,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:06:43,096 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 58 transitions. [2023-12-21 04:06:43,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-12-21 04:06:43,097 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:06:43,097 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:06:43,111 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-12-21 04:06:43,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:06:43,303 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:06:43,304 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:06:43,304 INFO L85 PathProgramCache]: Analyzing trace with hash 375035766, now seen corresponding path program 2 times [2023-12-21 04:06:43,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:06:43,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774423948] [2023-12-21 04:06:43,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:06:43,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:06:43,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:06:43,363 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-21 04:06:43,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:06:43,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774423948] [2023-12-21 04:06:43,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774423948] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:06:43,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281647389] [2023-12-21 04:06:43,364 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-21 04:06:43,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:06:43,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:06:43,365 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 04:06:43,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-21 04:06:43,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-21 04:06:43,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 04:06:43,415 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 21 conjunts are in the unsatisfiable core [2023-12-21 04:06:43,416 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:06:43,423 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-21 04:06:43,423 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 04:06:43,454 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-21 04:06:43,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281647389] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 04:06:43,454 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 04:06:43,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 6] total 10 [2023-12-21 04:06:43,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335659094] [2023-12-21 04:06:43,454 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 04:06:43,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-21 04:06:43,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:06:43,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-21 04:06:43,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-12-21 04:06:43,455 INFO L87 Difference]: Start difference. First operand 45 states and 58 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:06:43,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:06:43,843 INFO L93 Difference]: Finished difference Result 385 states and 512 transitions. [2023-12-21 04:06:43,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-12-21 04:06:43,851 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-12-21 04:06:43,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:06:43,852 INFO L225 Difference]: With dead ends: 385 [2023-12-21 04:06:43,852 INFO L226 Difference]: Without dead ends: 344 [2023-12-21 04:06:43,852 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=184, Invalid=686, Unknown=0, NotChecked=0, Total=870 [2023-12-21 04:06:43,853 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 664 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 664 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-21 04:06:43,853 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [664 Valid, 268 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-21 04:06:43,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2023-12-21 04:06:43,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 48. [2023-12-21 04:06:43,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.3191489361702127) internal successors, (62), 47 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:06:43,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 62 transitions. [2023-12-21 04:06:43,863 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 62 transitions. Word has length 27 [2023-12-21 04:06:43,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:06:43,863 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 62 transitions. [2023-12-21 04:06:43,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:06:43,863 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 62 transitions. [2023-12-21 04:06:43,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-12-21 04:06:43,864 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:06:43,864 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:06:43,870 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-12-21 04:06:44,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:06:44,069 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:06:44,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:06:44,069 INFO L85 PathProgramCache]: Analyzing trace with hash -447842013, now seen corresponding path program 1 times [2023-12-21 04:06:44,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:06:44,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373755756] [2023-12-21 04:06:44,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:06:44,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:06:44,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:06:44,145 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-21 04:06:44,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:06:44,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373755756] [2023-12-21 04:06:44,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373755756] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:06:44,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467692869] [2023-12-21 04:06:44,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:06:44,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:06:44,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:06:44,147 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 04:06:44,174 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-21 04:06:44,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:06:44,204 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-21 04:06:44,205 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:06:44,211 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-21 04:06:44,211 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-21 04:06:44,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467692869] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 04:06:44,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-21 04:06:44,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2023-12-21 04:06:44,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849319879] [2023-12-21 04:06:44,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 04:06:44,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-21 04:06:44,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:06:44,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-21 04:06:44,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-12-21 04:06:44,212 INFO L87 Difference]: Start difference. First operand 48 states and 62 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:06:44,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:06:44,234 INFO L93 Difference]: Finished difference Result 90 states and 122 transitions. [2023-12-21 04:06:44,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-21 04:06:44,235 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2023-12-21 04:06:44,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:06:44,235 INFO L225 Difference]: With dead ends: 90 [2023-12-21 04:06:44,235 INFO L226 Difference]: Without dead ends: 60 [2023-12-21 04:06:44,236 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-12-21 04:06:44,236 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 6 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 04:06:44,236 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 44 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 04:06:44,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-12-21 04:06:44,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 52. [2023-12-21 04:06:44,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.2941176470588236) internal successors, (66), 51 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:06:44,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 66 transitions. [2023-12-21 04:06:44,246 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 66 transitions. Word has length 29 [2023-12-21 04:06:44,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:06:44,246 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 66 transitions. [2023-12-21 04:06:44,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:06:44,247 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 66 transitions. [2023-12-21 04:06:44,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-12-21 04:06:44,247 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:06:44,247 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:06:44,256 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-12-21 04:06:44,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:06:44,452 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:06:44,452 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:06:44,452 INFO L85 PathProgramCache]: Analyzing trace with hash 552584609, now seen corresponding path program 3 times [2023-12-21 04:06:44,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:06:44,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686025798] [2023-12-21 04:06:44,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:06:44,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:06:44,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:06:44,537 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-21 04:06:44,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:06:44,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686025798] [2023-12-21 04:06:44,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686025798] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:06:44,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406205287] [2023-12-21 04:06:44,538 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-21 04:06:44,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:06:44,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:06:44,539 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 04:06:44,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-21 04:06:44,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-12-21 04:06:44,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 04:06:44,602 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 19 conjunts are in the unsatisfiable core [2023-12-21 04:06:44,603 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:06:44,738 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-12-21 04:06:44,738 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 04:06:44,824 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-12-21 04:06:44,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406205287] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-21 04:06:44,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-21 04:06:44,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [5, 9] total 19 [2023-12-21 04:06:44,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423015729] [2023-12-21 04:06:44,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 04:06:44,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-21 04:06:44,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:06:44,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-21 04:06:44,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2023-12-21 04:06:44,825 INFO L87 Difference]: Start difference. First operand 52 states and 66 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:06:44,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:06:44,903 INFO L93 Difference]: Finished difference Result 86 states and 109 transitions. [2023-12-21 04:06:44,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-21 04:06:44,903 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2023-12-21 04:06:44,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:06:44,904 INFO L225 Difference]: With dead ends: 86 [2023-12-21 04:06:44,904 INFO L226 Difference]: Without dead ends: 65 [2023-12-21 04:06:44,904 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2023-12-21 04:06:44,904 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 63 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 04:06:44,905 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 75 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 04:06:44,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-12-21 04:06:44,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 47. [2023-12-21 04:06:44,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.2826086956521738) internal successors, (59), 46 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:06:44,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 59 transitions. [2023-12-21 04:06:44,919 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 59 transitions. Word has length 30 [2023-12-21 04:06:44,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:06:44,919 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 59 transitions. [2023-12-21 04:06:44,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:06:44,919 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 59 transitions. [2023-12-21 04:06:44,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-12-21 04:06:44,922 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:06:44,922 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2023-12-21 04:06:44,934 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-12-21 04:06:45,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-12-21 04:06:45,127 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:06:45,128 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:06:45,128 INFO L85 PathProgramCache]: Analyzing trace with hash 2101631812, now seen corresponding path program 1 times [2023-12-21 04:06:45,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:06:45,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392281804] [2023-12-21 04:06:45,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:06:45,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:06:45,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:06:45,240 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-21 04:06:45,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:06:45,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392281804] [2023-12-21 04:06:45,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392281804] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:06:45,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872811412] [2023-12-21 04:06:45,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:06:45,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:06:45,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:06:45,242 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 04:06:45,265 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-21 04:06:45,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:06:45,301 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 22 conjunts are in the unsatisfiable core [2023-12-21 04:06:45,304 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:06:45,358 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-21 04:06:45,358 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 04:06:45,422 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-21 04:06:45,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872811412] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 04:06:45,422 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 04:06:45,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8, 7] total 16 [2023-12-21 04:06:45,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567979220] [2023-12-21 04:06:45,423 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 04:06:45,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-12-21 04:06:45,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:06:45,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-12-21 04:06:45,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2023-12-21 04:06:45,424 INFO L87 Difference]: Start difference. First operand 47 states and 59 transitions. Second operand has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:06:46,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:06:46,008 INFO L93 Difference]: Finished difference Result 426 states and 546 transitions. [2023-12-21 04:06:46,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-12-21 04:06:46,008 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2023-12-21 04:06:46,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:06:46,011 INFO L225 Difference]: With dead ends: 426 [2023-12-21 04:06:46,011 INFO L226 Difference]: Without dead ends: 376 [2023-12-21 04:06:46,013 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=273, Invalid=1367, Unknown=0, NotChecked=0, Total=1640 [2023-12-21 04:06:46,014 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 565 mSDsluCounter, 717 mSDsCounter, 0 mSdLazyCounter, 779 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 565 SdHoareTripleChecker+Valid, 824 SdHoareTripleChecker+Invalid, 810 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 779 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-21 04:06:46,014 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [565 Valid, 824 Invalid, 810 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 779 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-21 04:06:46,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2023-12-21 04:06:46,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 64. [2023-12-21 04:06:46,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.3015873015873016) internal successors, (82), 63 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:06:46,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 82 transitions. [2023-12-21 04:06:46,029 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 82 transitions. Word has length 32 [2023-12-21 04:06:46,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:06:46,030 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 82 transitions. [2023-12-21 04:06:46,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:06:46,030 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 82 transitions. [2023-12-21 04:06:46,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-12-21 04:06:46,031 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:06:46,031 INFO L195 NwaCegarLoop]: trace histogram [4, 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] [2023-12-21 04:06:46,050 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-12-21 04:06:46,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:06:46,236 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:06:46,236 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:06:46,236 INFO L85 PathProgramCache]: Analyzing trace with hash 1966011830, now seen corresponding path program 1 times [2023-12-21 04:06:46,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:06:46,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617690618] [2023-12-21 04:06:46,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:06:46,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:06:46,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:06:46,346 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-21 04:06:46,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:06:46,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617690618] [2023-12-21 04:06:46,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617690618] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:06:46,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115620026] [2023-12-21 04:06:46,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:06:46,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:06:46,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:06:46,348 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 04:06:46,380 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-21 04:06:46,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:06:46,417 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 30 conjunts are in the unsatisfiable core [2023-12-21 04:06:46,423 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:06:46,546 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-21 04:06:46,548 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-12-21 04:06:46,555 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-21 04:06:46,555 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 04:06:46,667 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 04:06:46,667 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 56 [2023-12-21 04:06:46,674 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 04:06:46,674 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 35 [2023-12-21 04:06:46,722 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-21 04:06:46,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115620026] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 04:06:46,722 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 04:06:46,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 21 [2023-12-21 04:06:46,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333428632] [2023-12-21 04:06:46,723 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 04:06:46,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-12-21 04:06:46,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:06:46,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-12-21 04:06:46,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2023-12-21 04:06:46,724 INFO L87 Difference]: Start difference. First operand 64 states and 82 transitions. Second operand has 21 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 21 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:06:47,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:06:47,483 INFO L93 Difference]: Finished difference Result 542 states and 718 transitions. [2023-12-21 04:06:47,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-12-21 04:06:47,483 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 21 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2023-12-21 04:06:47,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:06:47,485 INFO L225 Difference]: With dead ends: 542 [2023-12-21 04:06:47,485 INFO L226 Difference]: Without dead ends: 484 [2023-12-21 04:06:47,485 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=353, Invalid=1453, Unknown=0, NotChecked=0, Total=1806 [2023-12-21 04:06:47,486 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 553 mSDsluCounter, 544 mSDsCounter, 0 mSdLazyCounter, 545 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 553 SdHoareTripleChecker+Valid, 603 SdHoareTripleChecker+Invalid, 662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-21 04:06:47,486 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [553 Valid, 603 Invalid, 662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 545 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-21 04:06:47,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2023-12-21 04:06:47,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 89. [2023-12-21 04:06:47,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.2954545454545454) internal successors, (114), 88 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:06:47,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 114 transitions. [2023-12-21 04:06:47,507 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 114 transitions. Word has length 33 [2023-12-21 04:06:47,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:06:47,507 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 114 transitions. [2023-12-21 04:06:47,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 21 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:06:47,507 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 114 transitions. [2023-12-21 04:06:47,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-12-21 04:06:47,508 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:06:47,508 INFO L195 NwaCegarLoop]: trace histogram [5, 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] [2023-12-21 04:06:47,516 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-12-21 04:06:47,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-12-21 04:06:47,714 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:06:47,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:06:47,714 INFO L85 PathProgramCache]: Analyzing trace with hash -224416382, now seen corresponding path program 1 times [2023-12-21 04:06:47,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:06:47,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409179147] [2023-12-21 04:06:47,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:06:47,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:06:47,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:06:47,771 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-12-21 04:06:47,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:06:47,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409179147] [2023-12-21 04:06:47,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409179147] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:06:47,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247741284] [2023-12-21 04:06:47,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:06:47,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:06:47,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:06:47,773 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 04:06:47,776 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-21 04:06:47,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:06:47,830 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 32 conjunts are in the unsatisfiable core [2023-12-21 04:06:47,831 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:06:47,965 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2023-12-21 04:06:47,967 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2023-12-21 04:06:47,974 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-21 04:06:47,974 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 04:06:48,083 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 04:06:48,083 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 22 [2023-12-21 04:06:48,090 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 04:06:48,091 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 42 [2023-12-21 04:06:48,137 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-12-21 04:06:48,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247741284] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 04:06:48,137 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 04:06:48,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 9, 9] total 18 [2023-12-21 04:06:48,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475302462] [2023-12-21 04:06:48,138 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 04:06:48,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-12-21 04:06:48,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:06:48,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-12-21 04:06:48,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2023-12-21 04:06:48,139 INFO L87 Difference]: Start difference. First operand 89 states and 114 transitions. Second operand has 18 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 18 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:06:48,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:06:48,515 INFO L93 Difference]: Finished difference Result 307 states and 425 transitions. [2023-12-21 04:06:48,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-12-21 04:06:48,515 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 18 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2023-12-21 04:06:48,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:06:48,516 INFO L225 Difference]: With dead ends: 307 [2023-12-21 04:06:48,516 INFO L226 Difference]: Without dead ends: 235 [2023-12-21 04:06:48,517 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=209, Invalid=661, Unknown=0, NotChecked=0, Total=870 [2023-12-21 04:06:48,517 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 185 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-21 04:06:48,517 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [185 Valid, 307 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-21 04:06:48,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2023-12-21 04:06:48,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 121. [2023-12-21 04:06:48,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.2833333333333334) internal successors, (154), 120 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:06:48,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 154 transitions. [2023-12-21 04:06:48,546 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 154 transitions. Word has length 34 [2023-12-21 04:06:48,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:06:48,546 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 154 transitions. [2023-12-21 04:06:48,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 18 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:06:48,546 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 154 transitions. [2023-12-21 04:06:48,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-12-21 04:06:48,546 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:06:48,546 INFO L195 NwaCegarLoop]: trace histogram [5, 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] [2023-12-21 04:06:48,551 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-12-21 04:06:48,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-12-21 04:06:48,751 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:06:48,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:06:48,751 INFO L85 PathProgramCache]: Analyzing trace with hash -228316817, now seen corresponding path program 2 times [2023-12-21 04:06:48,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:06:48,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045654397] [2023-12-21 04:06:48,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:06:48,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:06:48,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:06:49,080 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-12-21 04:06:49,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:06:49,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045654397] [2023-12-21 04:06:49,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045654397] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:06:49,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314843769] [2023-12-21 04:06:49,081 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-21 04:06:49,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:06:49,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:06:49,082 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 04:06:49,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-21 04:06:49,148 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-21 04:06:49,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 04:06:49,149 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 32 conjunts are in the unsatisfiable core [2023-12-21 04:06:49,151 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:06:49,230 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-21 04:06:49,230 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 04:06:49,332 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-12-21 04:06:49,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314843769] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 04:06:49,332 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 04:06:49,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 9] total 20 [2023-12-21 04:06:49,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833149355] [2023-12-21 04:06:49,332 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 04:06:49,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-12-21 04:06:49,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:06:49,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-12-21 04:06:49,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2023-12-21 04:06:49,333 INFO L87 Difference]: Start difference. First operand 121 states and 154 transitions. Second operand has 20 states, 20 states have (on average 3.7) internal successors, (74), 20 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:06:50,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:06:50,065 INFO L93 Difference]: Finished difference Result 531 states and 685 transitions. [2023-12-21 04:06:50,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-12-21 04:06:50,066 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 20 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2023-12-21 04:06:50,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:06:50,067 INFO L225 Difference]: With dead ends: 531 [2023-12-21 04:06:50,067 INFO L226 Difference]: Without dead ends: 525 [2023-12-21 04:06:50,068 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=230, Invalid=1576, Unknown=0, NotChecked=0, Total=1806 [2023-12-21 04:06:50,068 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 483 mSDsluCounter, 968 mSDsCounter, 0 mSdLazyCounter, 986 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 483 SdHoareTripleChecker+Valid, 1073 SdHoareTripleChecker+Invalid, 1008 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 986 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-21 04:06:50,068 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [483 Valid, 1073 Invalid, 1008 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 986 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-21 04:06:50,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2023-12-21 04:06:50,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 159. [2023-12-21 04:06:50,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 1.2911392405063291) internal successors, (204), 158 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:06:50,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 204 transitions. [2023-12-21 04:06:50,111 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 204 transitions. Word has length 40 [2023-12-21 04:06:50,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:06:50,112 INFO L495 AbstractCegarLoop]: Abstraction has 159 states and 204 transitions. [2023-12-21 04:06:50,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 20 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:06:50,112 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 204 transitions. [2023-12-21 04:06:50,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-12-21 04:06:50,112 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:06:50,112 INFO L195 NwaCegarLoop]: trace histogram [5, 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] [2023-12-21 04:06:50,117 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-12-21 04:06:50,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-12-21 04:06:50,318 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:06:50,318 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:06:50,318 INFO L85 PathProgramCache]: Analyzing trace with hash 451741553, now seen corresponding path program 1 times [2023-12-21 04:06:50,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:06:50,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644652563] [2023-12-21 04:06:50,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:06:50,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:06:50,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:06:51,011 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-12-21 04:06:51,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:06:51,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644652563] [2023-12-21 04:06:51,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644652563] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:06:51,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72276708] [2023-12-21 04:06:51,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:06:51,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:06:51,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:06:51,013 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 04:06:51,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-21 04:06:51,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:06:51,081 INFO L262 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 43 conjunts are in the unsatisfiable core [2023-12-21 04:06:51,082 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:06:51,861 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 04:06:51,861 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 150 treesize of output 144 [2023-12-21 04:06:51,870 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 04:06:51,870 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 50 [2023-12-21 04:06:52,167 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-21 04:06:52,167 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 04:06:52,965 INFO L349 Elim1Store]: treesize reduction 58, result has 1.7 percent of original size [2023-12-21 04:06:52,965 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 188 treesize of output 1 [2023-12-21 04:06:52,965 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-12-21 04:06:52,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72276708] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 04:06:52,966 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 04:06:52,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 14, 13] total 31 [2023-12-21 04:06:52,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645421650] [2023-12-21 04:06:52,966 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 04:06:52,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-12-21 04:06:52,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:06:52,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-12-21 04:06:52,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=761, Unknown=0, NotChecked=0, Total=930 [2023-12-21 04:06:52,967 INFO L87 Difference]: Start difference. First operand 159 states and 204 transitions. Second operand has 31 states, 31 states have (on average 2.774193548387097) internal successors, (86), 31 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:06:56,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:06:56,388 INFO L93 Difference]: Finished difference Result 602 states and 787 transitions. [2023-12-21 04:06:56,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-12-21 04:06:56,388 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.774193548387097) internal successors, (86), 31 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2023-12-21 04:06:56,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:06:56,390 INFO L225 Difference]: With dead ends: 602 [2023-12-21 04:06:56,390 INFO L226 Difference]: Without dead ends: 474 [2023-12-21 04:06:56,391 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1199 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=838, Invalid=4132, Unknown=0, NotChecked=0, Total=4970 [2023-12-21 04:06:56,392 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 404 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 710 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 404 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 791 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 710 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-12-21 04:06:56,392 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [404 Valid, 288 Invalid, 791 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 710 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-12-21 04:06:56,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2023-12-21 04:06:56,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 329. [2023-12-21 04:06:56,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 1.25) internal successors, (410), 328 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:06:56,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 410 transitions. [2023-12-21 04:06:56,524 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 410 transitions. Word has length 40 [2023-12-21 04:06:56,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:06:56,525 INFO L495 AbstractCegarLoop]: Abstraction has 329 states and 410 transitions. [2023-12-21 04:06:56,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.774193548387097) internal successors, (86), 31 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:06:56,525 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 410 transitions. [2023-12-21 04:06:56,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-12-21 04:06:56,525 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:06:56,525 INFO L195 NwaCegarLoop]: trace histogram [5, 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] [2023-12-21 04:06:56,534 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-12-21 04:06:56,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-12-21 04:06:56,727 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:06:56,727 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:06:56,727 INFO L85 PathProgramCache]: Analyzing trace with hash 194385009, now seen corresponding path program 1 times [2023-12-21 04:06:56,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:06:56,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695329841] [2023-12-21 04:06:56,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:06:56,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:06:56,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:06:57,817 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-21 04:06:57,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:06:57,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695329841] [2023-12-21 04:06:57,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695329841] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:06:57,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269524916] [2023-12-21 04:06:57,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:06:57,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:06:57,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:06:57,819 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 04:06:57,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-12-21 04:06:57,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:06:57,886 INFO L262 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 45 conjunts are in the unsatisfiable core [2023-12-21 04:06:57,889 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:06:58,598 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 04:06:58,599 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 152 treesize of output 146 [2023-12-21 04:06:58,605 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 04:06:58,605 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 52 [2023-12-21 04:06:58,742 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-21 04:06:58,742 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 04:06:59,539 INFO L349 Elim1Store]: treesize reduction 58, result has 1.7 percent of original size [2023-12-21 04:06:59,540 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 188 treesize of output 1 [2023-12-21 04:06:59,540 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-12-21 04:06:59,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269524916] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 04:06:59,540 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 04:06:59,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 13] total 39 [2023-12-21 04:06:59,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829798606] [2023-12-21 04:06:59,541 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 04:06:59,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-12-21 04:06:59,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:06:59,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-12-21 04:06:59,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=1249, Unknown=0, NotChecked=0, Total=1482 [2023-12-21 04:06:59,542 INFO L87 Difference]: Start difference. First operand 329 states and 410 transitions. Second operand has 39 states, 39 states have (on average 2.3076923076923075) internal successors, (90), 39 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:07:13,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:07:13,309 INFO L93 Difference]: Finished difference Result 2546 states and 3287 transitions. [2023-12-21 04:07:13,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 222 states. [2023-12-21 04:07:13,309 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.3076923076923075) internal successors, (90), 39 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2023-12-21 04:07:13,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:07:13,316 INFO L225 Difference]: With dead ends: 2546 [2023-12-21 04:07:13,316 INFO L226 Difference]: Without dead ends: 2207 [2023-12-21 04:07:13,345 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 252 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25358 ImplicationChecksByTransitivity, 12.6s TimeCoverageRelationStatistics Valid=7604, Invalid=56658, Unknown=0, NotChecked=0, Total=64262 [2023-12-21 04:07:13,345 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 1576 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 1018 mSolverCounterSat, 288 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1576 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 1306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 288 IncrementalHoareTripleChecker+Valid, 1018 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-12-21 04:07:13,346 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1576 Valid, 383 Invalid, 1306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [288 Valid, 1018 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-12-21 04:07:13,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2207 states. [2023-12-21 04:07:13,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2207 to 493. [2023-12-21 04:07:13,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 493 states, 492 states have (on average 1.2134146341463414) internal successors, (597), 492 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:07:13,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 597 transitions. [2023-12-21 04:07:13,548 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 597 transitions. Word has length 40 [2023-12-21 04:07:13,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:07:13,548 INFO L495 AbstractCegarLoop]: Abstraction has 493 states and 597 transitions. [2023-12-21 04:07:13,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.3076923076923075) internal successors, (90), 39 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:07:13,548 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 597 transitions. [2023-12-21 04:07:13,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-12-21 04:07:13,549 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:07:13,549 INFO L195 NwaCegarLoop]: trace histogram [5, 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] [2023-12-21 04:07:13,556 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-12-21 04:07:13,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:07:13,751 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:07:13,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:07:13,751 INFO L85 PathProgramCache]: Analyzing trace with hash 575893485, now seen corresponding path program 1 times [2023-12-21 04:07:13,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:07:13,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490899831] [2023-12-21 04:07:13,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:07:13,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:07:13,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:07:14,768 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-21 04:07:14,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:07:14,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490899831] [2023-12-21 04:07:14,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490899831] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:07:14,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174029371] [2023-12-21 04:07:14,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:07:14,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:07:14,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:07:14,777 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 04:07:14,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-12-21 04:07:14,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:07:14,855 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 38 conjunts are in the unsatisfiable core [2023-12-21 04:07:14,856 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:07:15,028 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-21 04:07:15,029 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-12-21 04:07:15,040 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-21 04:07:15,040 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 04:07:15,212 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 04:07:15,212 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 56 [2023-12-21 04:07:15,326 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-12-21 04:07:15,326 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 9 [2023-12-21 04:07:15,335 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 04:07:15,335 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 3 [2023-12-21 04:07:15,371 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-12-21 04:07:15,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174029371] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 04:07:15,371 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 04:07:15,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 12] total 35 [2023-12-21 04:07:15,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004272874] [2023-12-21 04:07:15,371 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 04:07:15,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-12-21 04:07:15,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:07:15,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-12-21 04:07:15,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=975, Unknown=0, NotChecked=0, Total=1190 [2023-12-21 04:07:15,372 INFO L87 Difference]: Start difference. First operand 493 states and 597 transitions. Second operand has 35 states, 35 states have (on average 2.5714285714285716) internal successors, (90), 35 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:07:17,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:07:17,384 INFO L93 Difference]: Finished difference Result 1645 states and 1969 transitions. [2023-12-21 04:07:17,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-12-21 04:07:17,385 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.5714285714285716) internal successors, (90), 35 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2023-12-21 04:07:17,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:07:17,388 INFO L225 Difference]: With dead ends: 1645 [2023-12-21 04:07:17,388 INFO L226 Difference]: Without dead ends: 1443 [2023-12-21 04:07:17,389 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1349 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1038, Invalid=3792, Unknown=0, NotChecked=0, Total=4830 [2023-12-21 04:07:17,389 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 575 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 632 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 575 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 744 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-21 04:07:17,389 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [575 Valid, 297 Invalid, 744 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 632 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-21 04:07:17,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1443 states. [2023-12-21 04:07:17,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1443 to 522. [2023-12-21 04:07:17,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 522 states, 521 states have (on average 1.2034548944337813) internal successors, (627), 521 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:07:17,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 627 transitions. [2023-12-21 04:07:17,585 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 627 transitions. Word has length 40 [2023-12-21 04:07:17,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:07:17,585 INFO L495 AbstractCegarLoop]: Abstraction has 522 states and 627 transitions. [2023-12-21 04:07:17,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.5714285714285716) internal successors, (90), 35 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:07:17,586 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 627 transitions. [2023-12-21 04:07:17,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-12-21 04:07:17,586 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:07:17,586 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 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] [2023-12-21 04:07:17,591 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-12-21 04:07:17,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-12-21 04:07:17,791 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:07:17,791 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:07:17,791 INFO L85 PathProgramCache]: Analyzing trace with hash -1778602834, now seen corresponding path program 1 times [2023-12-21 04:07:17,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:07:17,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949161459] [2023-12-21 04:07:17,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:07:17,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:07:17,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:07:17,856 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-12-21 04:07:17,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:07:17,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949161459] [2023-12-21 04:07:17,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949161459] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:07:17,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933820876] [2023-12-21 04:07:17,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:07:17,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:07:17,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:07:17,857 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 04:07:17,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-12-21 04:07:17,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:07:17,923 INFO L262 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 20 conjunts are in the unsatisfiable core [2023-12-21 04:07:17,923 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:07:17,942 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-21 04:07:17,942 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 04:07:18,005 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-12-21 04:07:18,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933820876] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 04:07:18,006 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 04:07:18,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 8] total 14 [2023-12-21 04:07:18,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255043326] [2023-12-21 04:07:18,007 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 04:07:18,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-21 04:07:18,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:07:18,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-21 04:07:18,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2023-12-21 04:07:18,008 INFO L87 Difference]: Start difference. First operand 522 states and 627 transitions. Second operand has 14 states, 14 states have (on average 4.0) internal successors, (56), 14 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:07:18,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:07:18,399 INFO L93 Difference]: Finished difference Result 710 states and 848 transitions. [2023-12-21 04:07:18,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-21 04:07:18,400 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.0) internal successors, (56), 14 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2023-12-21 04:07:18,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:07:18,401 INFO L225 Difference]: With dead ends: 710 [2023-12-21 04:07:18,401 INFO L226 Difference]: Without dead ends: 541 [2023-12-21 04:07:18,402 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2023-12-21 04:07:18,402 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 152 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-21 04:07:18,402 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 227 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-21 04:07:18,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2023-12-21 04:07:18,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 343. [2023-12-21 04:07:18,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 342 states have (on average 1.1900584795321638) internal successors, (407), 342 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:07:18,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 407 transitions. [2023-12-21 04:07:18,527 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 407 transitions. Word has length 43 [2023-12-21 04:07:18,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:07:18,527 INFO L495 AbstractCegarLoop]: Abstraction has 343 states and 407 transitions. [2023-12-21 04:07:18,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.0) internal successors, (56), 14 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:07:18,528 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 407 transitions. [2023-12-21 04:07:18,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-12-21 04:07:18,528 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:07:18,528 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 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] [2023-12-21 04:07:18,538 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-12-21 04:07:18,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-12-21 04:07:18,736 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:07:18,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:07:18,737 INFO L85 PathProgramCache]: Analyzing trace with hash 569813385, now seen corresponding path program 2 times [2023-12-21 04:07:18,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:07:18,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144428139] [2023-12-21 04:07:18,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:07:18,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:07:18,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:07:18,864 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 20 proven. 3 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-12-21 04:07:18,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:07:18,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144428139] [2023-12-21 04:07:18,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144428139] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:07:18,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796221276] [2023-12-21 04:07:18,864 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-21 04:07:18,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:07:18,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:07:18,865 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 04:07:18,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-12-21 04:07:18,934 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-21 04:07:18,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 04:07:18,935 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 15 conjunts are in the unsatisfiable core [2023-12-21 04:07:18,936 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:07:18,970 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 20 proven. 8 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-12-21 04:07:18,970 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 04:07:19,019 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 20 proven. 3 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-12-21 04:07:19,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796221276] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 04:07:19,020 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 04:07:19,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 14 [2023-12-21 04:07:19,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896653204] [2023-12-21 04:07:19,020 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 04:07:19,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-21 04:07:19,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:07:19,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-21 04:07:19,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2023-12-21 04:07:19,022 INFO L87 Difference]: Start difference. First operand 343 states and 407 transitions. Second operand has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 14 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:07:19,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:07:19,393 INFO L93 Difference]: Finished difference Result 932 states and 1094 transitions. [2023-12-21 04:07:19,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-21 04:07:19,393 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 14 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2023-12-21 04:07:19,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:07:19,395 INFO L225 Difference]: With dead ends: 932 [2023-12-21 04:07:19,395 INFO L226 Difference]: Without dead ends: 612 [2023-12-21 04:07:19,395 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2023-12-21 04:07:19,396 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 143 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-21 04:07:19,396 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 213 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-21 04:07:19,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2023-12-21 04:07:19,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 367. [2023-12-21 04:07:19,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 366 states have (on average 1.185792349726776) internal successors, (434), 366 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:07:19,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 434 transitions. [2023-12-21 04:07:19,530 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 434 transitions. Word has length 49 [2023-12-21 04:07:19,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:07:19,531 INFO L495 AbstractCegarLoop]: Abstraction has 367 states and 434 transitions. [2023-12-21 04:07:19,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 14 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:07:19,531 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 434 transitions. [2023-12-21 04:07:19,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-12-21 04:07:19,531 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:07:19,531 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 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] [2023-12-21 04:07:19,536 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-12-21 04:07:19,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:07:19,736 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:07:19,736 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:07:19,737 INFO L85 PathProgramCache]: Analyzing trace with hash 976411459, now seen corresponding path program 3 times [2023-12-21 04:07:19,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:07:19,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856828346] [2023-12-21 04:07:19,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:07:19,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:07:19,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:07:20,299 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 23 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-12-21 04:07:20,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:07:20,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856828346] [2023-12-21 04:07:20,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856828346] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:07:20,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800289503] [2023-12-21 04:07:20,300 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-21 04:07:20,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:07:20,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:07:20,300 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 04:07:20,301 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-12-21 04:07:20,384 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-21 04:07:20,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 04:07:20,385 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 24 conjunts are in the unsatisfiable core [2023-12-21 04:07:20,386 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:07:20,503 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 13 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-21 04:07:20,504 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 04:07:20,656 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-12-21 04:07:20,656 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 30 [2023-12-21 04:07:20,682 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 4 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-12-21 04:07:20,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800289503] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 04:07:20,682 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 04:07:20,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 24 [2023-12-21 04:07:20,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977805168] [2023-12-21 04:07:20,683 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 04:07:20,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-12-21 04:07:20,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:07:20,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-12-21 04:07:20,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2023-12-21 04:07:20,683 INFO L87 Difference]: Start difference. First operand 367 states and 434 transitions. Second operand has 24 states, 24 states have (on average 3.5833333333333335) internal successors, (86), 24 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:07:21,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:07:21,176 INFO L93 Difference]: Finished difference Result 634 states and 740 transitions. [2023-12-21 04:07:21,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-21 04:07:21,176 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.5833333333333335) internal successors, (86), 24 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2023-12-21 04:07:21,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:07:21,177 INFO L225 Difference]: With dead ends: 634 [2023-12-21 04:07:21,177 INFO L226 Difference]: Without dead ends: 531 [2023-12-21 04:07:21,178 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=160, Invalid=652, Unknown=0, NotChecked=0, Total=812 [2023-12-21 04:07:21,179 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 135 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-21 04:07:21,179 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 375 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 338 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-21 04:07:21,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2023-12-21 04:07:21,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 345. [2023-12-21 04:07:21,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 344 states have (on average 1.188953488372093) internal successors, (409), 344 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:07:21,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 409 transitions. [2023-12-21 04:07:21,319 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 409 transitions. Word has length 50 [2023-12-21 04:07:21,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:07:21,319 INFO L495 AbstractCegarLoop]: Abstraction has 345 states and 409 transitions. [2023-12-21 04:07:21,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.5833333333333335) internal successors, (86), 24 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:07:21,319 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 409 transitions. [2023-12-21 04:07:21,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-12-21 04:07:21,320 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:07:21,320 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 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] [2023-12-21 04:07:21,329 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-12-21 04:07:21,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:07:21,524 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:07:21,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:07:21,524 INFO L85 PathProgramCache]: Analyzing trace with hash 1114244366, now seen corresponding path program 4 times [2023-12-21 04:07:21,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:07:21,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822652174] [2023-12-21 04:07:21,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:07:21,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:07:21,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:07:22,006 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-12-21 04:07:22,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:07:22,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822652174] [2023-12-21 04:07:22,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822652174] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:07:22,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399961860] [2023-12-21 04:07:22,007 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-21 04:07:22,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:07:22,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:07:22,008 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 04:07:22,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-12-21 04:07:22,083 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-21 04:07:22,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 04:07:22,085 INFO L262 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 48 conjunts are in the unsatisfiable core [2023-12-21 04:07:22,086 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:07:22,352 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-21 04:07:22,437 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 04:07:22,437 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 11 [2023-12-21 04:07:22,440 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-21 04:07:22,440 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 04:07:22,846 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 04:07:22,846 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 57 [2023-12-21 04:07:22,855 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 04:07:22,855 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 70 treesize of output 59 [2023-12-21 04:07:22,980 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 26 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-12-21 04:07:22,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399961860] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 04:07:22,981 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 04:07:22,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 17, 16] total 38 [2023-12-21 04:07:22,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759436312] [2023-12-21 04:07:22,981 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 04:07:22,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-12-21 04:07:22,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:07:22,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-12-21 04:07:22,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=1201, Unknown=0, NotChecked=0, Total=1406 [2023-12-21 04:07:22,982 INFO L87 Difference]: Start difference. First operand 345 states and 409 transitions. Second operand has 38 states, 38 states have (on average 2.9473684210526314) internal successors, (112), 38 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:07:24,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:07:24,572 INFO L93 Difference]: Finished difference Result 807 states and 947 transitions. [2023-12-21 04:07:24,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-12-21 04:07:24,573 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.9473684210526314) internal successors, (112), 38 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2023-12-21 04:07:24,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:07:24,575 INFO L225 Difference]: With dead ends: 807 [2023-12-21 04:07:24,575 INFO L226 Difference]: Without dead ends: 803 [2023-12-21 04:07:24,576 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1254 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=874, Invalid=4382, Unknown=0, NotChecked=0, Total=5256 [2023-12-21 04:07:24,576 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 390 mSDsluCounter, 452 mSDsCounter, 0 mSdLazyCounter, 985 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 390 SdHoareTripleChecker+Valid, 492 SdHoareTripleChecker+Invalid, 1042 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 985 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-21 04:07:24,576 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [390 Valid, 492 Invalid, 1042 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 985 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-21 04:07:24,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 803 states. [2023-12-21 04:07:24,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 803 to 381. [2023-12-21 04:07:24,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 380 states have (on average 1.1710526315789473) internal successors, (445), 380 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:07:24,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 445 transitions. [2023-12-21 04:07:24,740 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 445 transitions. Word has length 51 [2023-12-21 04:07:24,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:07:24,740 INFO L495 AbstractCegarLoop]: Abstraction has 381 states and 445 transitions. [2023-12-21 04:07:24,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.9473684210526314) internal successors, (112), 38 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:07:24,740 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 445 transitions. [2023-12-21 04:07:24,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-12-21 04:07:24,741 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:07:24,741 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 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] [2023-12-21 04:07:24,748 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-12-21 04:07:24,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:07:24,946 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:07:24,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:07:24,946 INFO L85 PathProgramCache]: Analyzing trace with hash 673902686, now seen corresponding path program 5 times [2023-12-21 04:07:24,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:07:24,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879857775] [2023-12-21 04:07:24,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:07:24,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:07:24,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:07:25,094 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2023-12-21 04:07:25,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:07:25,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879857775] [2023-12-21 04:07:25,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879857775] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:07:25,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965903319] [2023-12-21 04:07:25,094 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-21 04:07:25,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:07:25,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:07:25,095 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 04:07:25,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-12-21 04:07:25,394 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-12-21 04:07:25,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 04:07:25,395 INFO L262 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 29 conjunts are in the unsatisfiable core [2023-12-21 04:07:25,396 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:07:25,431 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2023-12-21 04:07:25,431 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 04:07:25,546 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 17 proven. 12 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-12-21 04:07:25,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965903319] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 04:07:25,546 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 04:07:25,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 11] total 18 [2023-12-21 04:07:25,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932342838] [2023-12-21 04:07:25,546 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 04:07:25,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-12-21 04:07:25,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:07:25,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-12-21 04:07:25,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2023-12-21 04:07:25,547 INFO L87 Difference]: Start difference. First operand 381 states and 445 transitions. Second operand has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 18 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:07:28,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:07:28,323 INFO L93 Difference]: Finished difference Result 2361 states and 2768 transitions. [2023-12-21 04:07:28,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2023-12-21 04:07:28,324 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 18 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2023-12-21 04:07:28,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:07:28,328 INFO L225 Difference]: With dead ends: 2361 [2023-12-21 04:07:28,328 INFO L226 Difference]: Without dead ends: 2290 [2023-12-21 04:07:28,329 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1308 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=772, Invalid=3784, Unknown=0, NotChecked=0, Total=4556 [2023-12-21 04:07:28,329 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 755 mSDsluCounter, 363 mSDsCounter, 0 mSdLazyCounter, 487 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 755 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-21 04:07:28,330 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [755 Valid, 404 Invalid, 545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 487 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-21 04:07:28,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2290 states. [2023-12-21 04:07:28,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2290 to 411. [2023-12-21 04:07:28,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 1.173170731707317) internal successors, (481), 410 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:07:28,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 481 transitions. [2023-12-21 04:07:28,512 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 481 transitions. Word has length 52 [2023-12-21 04:07:28,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:07:28,512 INFO L495 AbstractCegarLoop]: Abstraction has 411 states and 481 transitions. [2023-12-21 04:07:28,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 18 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:07:28,512 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 481 transitions. [2023-12-21 04:07:28,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-12-21 04:07:28,513 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:07:28,513 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:07:28,518 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-12-21 04:07:28,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-12-21 04:07:28,713 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:07:28,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:07:28,714 INFO L85 PathProgramCache]: Analyzing trace with hash -1791256246, now seen corresponding path program 6 times [2023-12-21 04:07:28,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:07:28,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003750500] [2023-12-21 04:07:28,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:07:28,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:07:28,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:07:28,925 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2023-12-21 04:07:28,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:07:28,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003750500] [2023-12-21 04:07:28,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003750500] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:07:28,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107854745] [2023-12-21 04:07:28,925 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-21 04:07:28,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:07:28,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:07:28,926 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 04:07:28,952 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-12-21 04:07:29,066 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-12-21 04:07:29,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 04:07:29,067 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 27 conjunts are in the unsatisfiable core [2023-12-21 04:07:29,068 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:07:29,083 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-12-21 04:07:29,441 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 33 proven. 3 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2023-12-21 04:07:29,441 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 04:07:29,716 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 28 proven. 3 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-12-21 04:07:29,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107854745] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 04:07:29,716 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 04:07:29,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11] total 30 [2023-12-21 04:07:29,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754983262] [2023-12-21 04:07:29,716 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 04:07:29,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-12-21 04:07:29,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:07:29,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-12-21 04:07:29,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=731, Unknown=0, NotChecked=0, Total=870 [2023-12-21 04:07:29,717 INFO L87 Difference]: Start difference. First operand 411 states and 481 transitions. Second operand has 30 states, 30 states have (on average 3.1666666666666665) internal successors, (95), 30 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:07:35,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:07:35,485 INFO L93 Difference]: Finished difference Result 5226 states and 6116 transitions. [2023-12-21 04:07:35,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2023-12-21 04:07:35,486 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.1666666666666665) internal successors, (95), 30 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2023-12-21 04:07:35,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:07:35,494 INFO L225 Difference]: With dead ends: 5226 [2023-12-21 04:07:35,494 INFO L226 Difference]: Without dead ends: 4132 [2023-12-21 04:07:35,496 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4512 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1719, Invalid=13043, Unknown=0, NotChecked=0, Total=14762 [2023-12-21 04:07:35,496 INFO L413 NwaCegarLoop]: 154 mSDtfsCounter, 1273 mSDsluCounter, 2197 mSDsCounter, 0 mSdLazyCounter, 1927 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1273 SdHoareTripleChecker+Valid, 2351 SdHoareTripleChecker+Invalid, 2058 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 1927 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-12-21 04:07:35,496 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1273 Valid, 2351 Invalid, 2058 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 1927 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-12-21 04:07:35,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4132 states. [2023-12-21 04:07:36,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4132 to 1514. [2023-12-21 04:07:36,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1514 states, 1513 states have (on average 1.1711830799735625) internal successors, (1772), 1513 states have internal predecessors, (1772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:07:36,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1514 states to 1514 states and 1772 transitions. [2023-12-21 04:07:36,269 INFO L78 Accepts]: Start accepts. Automaton has 1514 states and 1772 transitions. Word has length 60 [2023-12-21 04:07:36,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:07:36,269 INFO L495 AbstractCegarLoop]: Abstraction has 1514 states and 1772 transitions. [2023-12-21 04:07:36,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.1666666666666665) internal successors, (95), 30 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:07:36,273 INFO L276 IsEmpty]: Start isEmpty. Operand 1514 states and 1772 transitions. [2023-12-21 04:07:36,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-12-21 04:07:36,277 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:07:36,277 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:07:36,286 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-12-21 04:07:36,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-12-21 04:07:36,482 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:07:36,483 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:07:36,483 INFO L85 PathProgramCache]: Analyzing trace with hash 1898640092, now seen corresponding path program 7 times [2023-12-21 04:07:36,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:07:36,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814475725] [2023-12-21 04:07:36,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:07:36,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:07:36,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:07:37,706 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 20 proven. 38 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-12-21 04:07:37,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:07:37,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814475725] [2023-12-21 04:07:37,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814475725] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:07:37,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513873171] [2023-12-21 04:07:37,707 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-21 04:07:37,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:07:37,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:07:37,708 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 04:07:37,708 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-12-21 04:07:37,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:07:37,785 INFO L262 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 49 conjunts are in the unsatisfiable core [2023-12-21 04:07:37,786 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:07:38,067 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-21 04:07:38,072 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-12-21 04:07:38,081 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 20 proven. 47 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-12-21 04:07:38,081 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 04:07:38,298 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 04:07:38,298 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 58 [2023-12-21 04:07:38,304 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 04:07:38,305 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 35 [2023-12-21 04:07:38,442 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 26 proven. 30 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-12-21 04:07:38,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513873171] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 04:07:38,442 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 04:07:38,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 14] total 38 [2023-12-21 04:07:38,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360670088] [2023-12-21 04:07:38,442 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 04:07:38,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-12-21 04:07:38,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:07:38,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-12-21 04:07:38,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=1201, Unknown=0, NotChecked=0, Total=1406 [2023-12-21 04:07:38,443 INFO L87 Difference]: Start difference. First operand 1514 states and 1772 transitions. Second operand has 38 states, 38 states have (on average 3.1578947368421053) internal successors, (120), 38 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:07:40,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:07:40,724 INFO L93 Difference]: Finished difference Result 2471 states and 2879 transitions. [2023-12-21 04:07:40,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-12-21 04:07:40,725 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.1578947368421053) internal successors, (120), 38 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2023-12-21 04:07:40,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:07:40,729 INFO L225 Difference]: With dead ends: 2471 [2023-12-21 04:07:40,729 INFO L226 Difference]: Without dead ends: 2325 [2023-12-21 04:07:40,730 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1186 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=624, Invalid=3666, Unknown=0, NotChecked=0, Total=4290 [2023-12-21 04:07:40,730 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 508 mSDsluCounter, 450 mSDsCounter, 0 mSdLazyCounter, 895 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 508 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 1022 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 895 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-21 04:07:40,730 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [508 Valid, 482 Invalid, 1022 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 895 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-21 04:07:40,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2325 states. [2023-12-21 04:07:41,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2325 to 2054. [2023-12-21 04:07:41,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2054 states, 2053 states have (on average 1.1695080370189965) internal successors, (2401), 2053 states have internal predecessors, (2401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:07:41,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2054 states to 2054 states and 2401 transitions. [2023-12-21 04:07:41,738 INFO L78 Accepts]: Start accepts. Automaton has 2054 states and 2401 transitions. Word has length 61 [2023-12-21 04:07:41,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:07:41,738 INFO L495 AbstractCegarLoop]: Abstraction has 2054 states and 2401 transitions. [2023-12-21 04:07:41,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.1578947368421053) internal successors, (120), 38 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:07:41,738 INFO L276 IsEmpty]: Start isEmpty. Operand 2054 states and 2401 transitions. [2023-12-21 04:07:41,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-12-21 04:07:41,740 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:07:41,740 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:07:41,745 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-12-21 04:07:41,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:07:41,946 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:07:41,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:07:41,946 INFO L85 PathProgramCache]: Analyzing trace with hash -1046943080, now seen corresponding path program 8 times [2023-12-21 04:07:41,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:07:41,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751025947] [2023-12-21 04:07:41,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:07:41,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:07:41,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:07:43,691 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 13 proven. 48 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-12-21 04:07:43,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:07:43,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751025947] [2023-12-21 04:07:43,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751025947] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:07:43,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856660460] [2023-12-21 04:07:43,691 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-21 04:07:43,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:07:43,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:07:43,692 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 04:07:43,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-12-21 04:07:43,767 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-21 04:07:43,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 04:07:43,769 INFO L262 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 50 conjunts are in the unsatisfiable core [2023-12-21 04:07:43,770 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:07:44,158 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-21 04:07:44,160 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-12-21 04:07:44,176 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 13 proven. 53 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-12-21 04:07:44,176 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 04:07:44,477 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 04:07:44,478 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 58 [2023-12-21 04:07:44,592 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 04:07:44,592 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 3 [2023-12-21 04:07:44,598 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-12-21 04:07:44,598 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 9 [2023-12-21 04:07:44,734 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 17 proven. 43 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-12-21 04:07:44,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856660460] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 04:07:44,734 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 04:07:44,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 16] total 44 [2023-12-21 04:07:44,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757454032] [2023-12-21 04:07:44,734 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 04:07:44,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-12-21 04:07:44,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:07:44,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-12-21 04:07:44,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=1642, Unknown=0, NotChecked=0, Total=1892 [2023-12-21 04:07:44,735 INFO L87 Difference]: Start difference. First operand 2054 states and 2401 transitions. Second operand has 44 states, 44 states have (on average 2.8863636363636362) internal successors, (127), 44 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:07:48,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:07:48,248 INFO L93 Difference]: Finished difference Result 3230 states and 3781 transitions. [2023-12-21 04:07:48,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-12-21 04:07:48,249 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.8863636363636362) internal successors, (127), 44 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2023-12-21 04:07:48,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:07:48,254 INFO L225 Difference]: With dead ends: 3230 [2023-12-21 04:07:48,254 INFO L226 Difference]: Without dead ends: 3029 [2023-12-21 04:07:48,255 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1491 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=808, Invalid=4594, Unknown=0, NotChecked=0, Total=5402 [2023-12-21 04:07:48,255 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 748 mSDsluCounter, 564 mSDsCounter, 0 mSdLazyCounter, 1120 mSolverCounterSat, 246 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 748 SdHoareTripleChecker+Valid, 596 SdHoareTripleChecker+Invalid, 1366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 246 IncrementalHoareTripleChecker+Valid, 1120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-21 04:07:48,255 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [748 Valid, 596 Invalid, 1366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [246 Valid, 1120 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-21 04:07:48,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3029 states. [2023-12-21 04:07:49,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3029 to 2625. [2023-12-21 04:07:49,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2625 states, 2624 states have (on average 1.1673018292682926) internal successors, (3063), 2624 states have internal predecessors, (3063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:07:49,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2625 states to 2625 states and 3063 transitions. [2023-12-21 04:07:49,541 INFO L78 Accepts]: Start accepts. Automaton has 2625 states and 3063 transitions. Word has length 61 [2023-12-21 04:07:49,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:07:49,541 INFO L495 AbstractCegarLoop]: Abstraction has 2625 states and 3063 transitions. [2023-12-21 04:07:49,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.8863636363636362) internal successors, (127), 44 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:07:49,541 INFO L276 IsEmpty]: Start isEmpty. Operand 2625 states and 3063 transitions. [2023-12-21 04:07:49,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-12-21 04:07:49,544 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:07:49,544 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:07:49,549 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-12-21 04:07:49,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:07:49,749 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:07:49,750 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:07:49,750 INFO L85 PathProgramCache]: Analyzing trace with hash -603508644, now seen corresponding path program 9 times [2023-12-21 04:07:49,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:07:49,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65007801] [2023-12-21 04:07:49,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:07:49,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:07:49,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:07:50,904 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 20 proven. 38 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-12-21 04:07:50,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:07:50,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65007801] [2023-12-21 04:07:50,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65007801] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:07:50,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843510769] [2023-12-21 04:07:50,904 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-21 04:07:50,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:07:50,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:07:50,905 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 04:07:50,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-12-21 04:07:51,061 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-12-21 04:07:51,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 04:07:51,063 INFO L262 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 68 conjunts are in the unsatisfiable core [2023-12-21 04:07:51,065 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:07:51,131 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 35 [2023-12-21 04:07:51,135 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2023-12-21 04:07:51,662 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 04:07:51,662 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 11 [2023-12-21 04:07:51,679 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 20 proven. 51 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-21 04:07:51,679 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 04:07:52,467 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 45 proven. 13 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-12-21 04:07:52,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843510769] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 04:07:52,467 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 04:07:52,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 17] total 51 [2023-12-21 04:07:52,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881692228] [2023-12-21 04:07:52,467 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 04:07:52,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-12-21 04:07:52,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:07:52,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-12-21 04:07:52,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=451, Invalid=2099, Unknown=0, NotChecked=0, Total=2550 [2023-12-21 04:07:52,469 INFO L87 Difference]: Start difference. First operand 2625 states and 3063 transitions. Second operand has 51 states, 51 states have (on average 2.7058823529411766) internal successors, (138), 51 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:07:56,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:07:56,525 INFO L93 Difference]: Finished difference Result 3294 states and 3810 transitions. [2023-12-21 04:07:56,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2023-12-21 04:07:56,526 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.7058823529411766) internal successors, (138), 51 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2023-12-21 04:07:56,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:07:56,532 INFO L225 Difference]: With dead ends: 3294 [2023-12-21 04:07:56,532 INFO L226 Difference]: Without dead ends: 3116 [2023-12-21 04:07:56,533 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4329 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2428, Invalid=11852, Unknown=0, NotChecked=0, Total=14280 [2023-12-21 04:07:56,534 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 743 mSDsluCounter, 451 mSDsCounter, 0 mSdLazyCounter, 1133 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 743 SdHoareTripleChecker+Valid, 478 SdHoareTripleChecker+Invalid, 1210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 1133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-21 04:07:56,534 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [743 Valid, 478 Invalid, 1210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 1133 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-21 04:07:56,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3116 states. [2023-12-21 04:07:57,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3116 to 2664. [2023-12-21 04:07:57,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2664 states, 2663 states have (on average 1.159218926023282) internal successors, (3087), 2663 states have internal predecessors, (3087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:07:57,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2664 states to 2664 states and 3087 transitions. [2023-12-21 04:07:57,900 INFO L78 Accepts]: Start accepts. Automaton has 2664 states and 3087 transitions. Word has length 61 [2023-12-21 04:07:57,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:07:57,900 INFO L495 AbstractCegarLoop]: Abstraction has 2664 states and 3087 transitions. [2023-12-21 04:07:57,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.7058823529411766) internal successors, (138), 51 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:07:57,900 INFO L276 IsEmpty]: Start isEmpty. Operand 2664 states and 3087 transitions. [2023-12-21 04:07:57,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-12-21 04:07:57,903 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:07:57,903 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:07:57,908 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-12-21 04:07:58,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-12-21 04:07:58,108 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:07:58,109 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:07:58,109 INFO L85 PathProgramCache]: Analyzing trace with hash -1025401576, now seen corresponding path program 10 times [2023-12-21 04:07:58,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:07:58,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190456337] [2023-12-21 04:07:58,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:07:58,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:07:58,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:07:59,760 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 13 proven. 48 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-12-21 04:07:59,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:07:59,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190456337] [2023-12-21 04:07:59,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190456337] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:07:59,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479072157] [2023-12-21 04:07:59,761 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-21 04:07:59,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:07:59,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:07:59,762 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 04:07:59,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-12-21 04:07:59,838 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-21 04:07:59,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 04:07:59,839 INFO L262 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 45 conjunts are in the unsatisfiable core [2023-12-21 04:07:59,841 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:08:00,137 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2023-12-21 04:08:00,142 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2023-12-21 04:08:00,154 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 13 proven. 51 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-21 04:08:00,154 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 04:08:00,419 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 04:08:00,419 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2023-12-21 04:08:00,525 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 04:08:00,525 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 3 [2023-12-21 04:08:00,531 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-12-21 04:08:00,531 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 9 [2023-12-21 04:08:00,602 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-12-21 04:08:00,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479072157] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 04:08:00,603 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 04:08:00,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 14, 14] total 40 [2023-12-21 04:08:00,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498318751] [2023-12-21 04:08:00,603 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 04:08:00,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-12-21 04:08:00,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:08:00,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-12-21 04:08:00,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=1341, Unknown=0, NotChecked=0, Total=1560 [2023-12-21 04:08:00,604 INFO L87 Difference]: Start difference. First operand 2664 states and 3087 transitions. Second operand has 40 states, 40 states have (on average 3.125) internal successors, (125), 40 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:08:03,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:08:03,483 INFO L93 Difference]: Finished difference Result 3075 states and 3573 transitions. [2023-12-21 04:08:03,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-12-21 04:08:03,483 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.125) internal successors, (125), 40 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2023-12-21 04:08:03,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:08:03,488 INFO L225 Difference]: With dead ends: 3075 [2023-12-21 04:08:03,489 INFO L226 Difference]: Without dead ends: 2869 [2023-12-21 04:08:03,489 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1129 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=669, Invalid=3491, Unknown=0, NotChecked=0, Total=4160 [2023-12-21 04:08:03,489 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 253 mSDsluCounter, 448 mSDsCounter, 0 mSdLazyCounter, 831 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 475 SdHoareTripleChecker+Invalid, 918 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 831 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-21 04:08:03,490 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [253 Valid, 475 Invalid, 918 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 831 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-21 04:08:03,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2869 states. [2023-12-21 04:08:04,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2869 to 2538. [2023-12-21 04:08:04,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2538 states, 2537 states have (on average 1.1616081986598346) internal successors, (2947), 2537 states have internal predecessors, (2947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:08:04,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2538 states to 2538 states and 2947 transitions. [2023-12-21 04:08:04,807 INFO L78 Accepts]: Start accepts. Automaton has 2538 states and 2947 transitions. Word has length 61 [2023-12-21 04:08:04,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:08:04,807 INFO L495 AbstractCegarLoop]: Abstraction has 2538 states and 2947 transitions. [2023-12-21 04:08:04,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.125) internal successors, (125), 40 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:08:04,807 INFO L276 IsEmpty]: Start isEmpty. Operand 2538 states and 2947 transitions. [2023-12-21 04:08:04,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-12-21 04:08:04,810 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:08:04,810 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:08:04,817 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-12-21 04:08:05,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-12-21 04:08:05,016 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:08:05,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:08:05,016 INFO L85 PathProgramCache]: Analyzing trace with hash 282796537, now seen corresponding path program 11 times [2023-12-21 04:08:05,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:08:05,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670624773] [2023-12-21 04:08:05,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:08:05,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:08:05,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:08:06,526 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 104 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-12-21 04:08:06,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:08:06,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670624773] [2023-12-21 04:08:06,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670624773] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:08:06,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613089051] [2023-12-21 04:08:06,526 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-21 04:08:06,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:08:06,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:08:06,527 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 04:08:06,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-12-21 04:08:08,133 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2023-12-21 04:08:08,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 04:08:08,141 INFO L262 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 60 conjunts are in the unsatisfiable core [2023-12-21 04:08:08,143 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:08:08,203 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-12-21 04:08:08,457 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2023-12-21 04:08:08,556 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 04:08:08,556 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 11 [2023-12-21 04:08:08,557 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 1 proven. 110 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-12-21 04:08:08,557 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 04:08:09,552 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 04:08:09,552 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 59 [2023-12-21 04:08:10,048 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 9 proven. 87 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-12-21 04:08:10,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613089051] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 04:08:10,048 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 04:08:10,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 21, 19] total 59 [2023-12-21 04:08:10,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588472346] [2023-12-21 04:08:10,048 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 04:08:10,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2023-12-21 04:08:10,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:08:10,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2023-12-21 04:08:10,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=344, Invalid=3078, Unknown=0, NotChecked=0, Total=3422 [2023-12-21 04:08:10,049 INFO L87 Difference]: Start difference. First operand 2538 states and 2947 transitions. Second operand has 59 states, 59 states have (on average 2.847457627118644) internal successors, (168), 59 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:08:21,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:08:21,238 INFO L93 Difference]: Finished difference Result 5178 states and 6008 transitions. [2023-12-21 04:08:21,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 147 states. [2023-12-21 04:08:21,238 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.847457627118644) internal successors, (168), 59 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2023-12-21 04:08:21,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:08:21,247 INFO L225 Difference]: With dead ends: 5178 [2023-12-21 04:08:21,247 INFO L226 Difference]: Without dead ends: 3943 [2023-12-21 04:08:21,250 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12427 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=3179, Invalid=35041, Unknown=0, NotChecked=0, Total=38220 [2023-12-21 04:08:21,250 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 1164 mSDsluCounter, 2508 mSDsCounter, 0 mSdLazyCounter, 3666 mSolverCounterSat, 198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1164 SdHoareTripleChecker+Valid, 2602 SdHoareTripleChecker+Invalid, 3864 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 198 IncrementalHoareTripleChecker+Valid, 3666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-12-21 04:08:21,250 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1164 Valid, 2602 Invalid, 3864 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [198 Valid, 3666 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-12-21 04:08:21,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3943 states. [2023-12-21 04:08:22,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3943 to 1827. [2023-12-21 04:08:22,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1827 states, 1826 states have (on average 1.1100766703176341) internal successors, (2027), 1826 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:08:22,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1827 states to 1827 states and 2027 transitions. [2023-12-21 04:08:22,316 INFO L78 Accepts]: Start accepts. Automaton has 1827 states and 2027 transitions. Word has length 72 [2023-12-21 04:08:22,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:08:22,317 INFO L495 AbstractCegarLoop]: Abstraction has 1827 states and 2027 transitions. [2023-12-21 04:08:22,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.847457627118644) internal successors, (168), 59 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:08:22,317 INFO L276 IsEmpty]: Start isEmpty. Operand 1827 states and 2027 transitions. [2023-12-21 04:08:22,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-12-21 04:08:22,319 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:08:22,319 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:08:22,327 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-12-21 04:08:22,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-12-21 04:08:22,525 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:08:22,526 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:08:22,526 INFO L85 PathProgramCache]: Analyzing trace with hash 1632180661, now seen corresponding path program 12 times [2023-12-21 04:08:22,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:08:22,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375241734] [2023-12-21 04:08:22,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:08:22,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:08:22,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:08:24,063 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-12-21 04:08:24,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:08:24,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375241734] [2023-12-21 04:08:24,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375241734] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:08:24,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77682034] [2023-12-21 04:08:24,064 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-21 04:08:24,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:08:24,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:08:24,065 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 04:08:24,066 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-12-21 04:08:24,224 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-12-21 04:08:24,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 04:08:24,225 INFO L262 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 31 conjunts are in the unsatisfiable core [2023-12-21 04:08:24,226 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:08:24,532 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2023-12-21 04:08:24,547 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2023-12-21 04:08:24,547 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 04:08:24,845 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-12-21 04:08:24,845 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 31 [2023-12-21 04:08:24,913 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2023-12-21 04:08:24,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77682034] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 04:08:24,913 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 04:08:24,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 13, 11] total 42 [2023-12-21 04:08:24,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407383072] [2023-12-21 04:08:24,913 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 04:08:24,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-12-21 04:08:24,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:08:24,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-12-21 04:08:24,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=1522, Unknown=0, NotChecked=0, Total=1722 [2023-12-21 04:08:24,914 INFO L87 Difference]: Start difference. First operand 1827 states and 2027 transitions. Second operand has 42 states, 42 states have (on average 3.4523809523809526) internal successors, (145), 42 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:08:27,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:08:27,681 INFO L93 Difference]: Finished difference Result 2222 states and 2466 transitions. [2023-12-21 04:08:27,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-12-21 04:08:27,682 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 3.4523809523809526) internal successors, (145), 42 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2023-12-21 04:08:27,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:08:27,684 INFO L225 Difference]: With dead ends: 2222 [2023-12-21 04:08:27,684 INFO L226 Difference]: Without dead ends: 2218 [2023-12-21 04:08:27,685 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1004 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=589, Invalid=3833, Unknown=0, NotChecked=0, Total=4422 [2023-12-21 04:08:27,685 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 347 mSDsluCounter, 1374 mSDsCounter, 0 mSdLazyCounter, 1671 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 1447 SdHoareTripleChecker+Invalid, 1693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1671 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-21 04:08:27,685 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [347 Valid, 1447 Invalid, 1693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1671 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-21 04:08:27,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2218 states. [2023-12-21 04:08:28,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2218 to 1660. [2023-12-21 04:08:28,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1660 states, 1659 states have (on average 1.108499095840868) internal successors, (1839), 1659 states have internal predecessors, (1839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:08:28,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1660 states to 1660 states and 1839 transitions. [2023-12-21 04:08:28,644 INFO L78 Accepts]: Start accepts. Automaton has 1660 states and 1839 transitions. Word has length 72 [2023-12-21 04:08:28,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:08:28,644 INFO L495 AbstractCegarLoop]: Abstraction has 1660 states and 1839 transitions. [2023-12-21 04:08:28,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.4523809523809526) internal successors, (145), 42 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:08:28,645 INFO L276 IsEmpty]: Start isEmpty. Operand 1660 states and 1839 transitions. [2023-12-21 04:08:28,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-12-21 04:08:28,646 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:08:28,647 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 6, 6, 5, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:08:28,652 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-12-21 04:08:28,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-12-21 04:08:28,847 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:08:28,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:08:28,847 INFO L85 PathProgramCache]: Analyzing trace with hash -450702457, now seen corresponding path program 13 times [2023-12-21 04:08:28,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:08:28,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131882966] [2023-12-21 04:08:28,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:08:28,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:08:28,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:08:29,149 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2023-12-21 04:08:29,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:08:29,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131882966] [2023-12-21 04:08:29,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131882966] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:08:29,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797037651] [2023-12-21 04:08:29,150 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-21 04:08:29,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:08:29,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:08:29,151 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 04:08:29,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-12-21 04:08:29,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:08:29,257 INFO L262 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 38 conjunts are in the unsatisfiable core [2023-12-21 04:08:29,258 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:08:29,491 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 8 [2023-12-21 04:08:29,506 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 0 proven. 124 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2023-12-21 04:08:29,506 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 04:08:29,867 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-12-21 04:08:29,867 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 31 [2023-12-21 04:08:29,969 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 4 proven. 106 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2023-12-21 04:08:29,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797037651] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 04:08:29,970 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 04:08:29,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17, 13] total 34 [2023-12-21 04:08:29,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168676443] [2023-12-21 04:08:29,970 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 04:08:29,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-12-21 04:08:29,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:08:29,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-12-21 04:08:29,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=1031, Unknown=0, NotChecked=0, Total=1122 [2023-12-21 04:08:29,971 INFO L87 Difference]: Start difference. First operand 1660 states and 1839 transitions. Second operand has 34 states, 34 states have (on average 3.8529411764705883) internal successors, (131), 34 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:08:36,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:08:36,434 INFO L93 Difference]: Finished difference Result 8141 states and 9311 transitions. [2023-12-21 04:08:36,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-12-21 04:08:36,434 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.8529411764705883) internal successors, (131), 34 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2023-12-21 04:08:36,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:08:36,443 INFO L225 Difference]: With dead ends: 8141 [2023-12-21 04:08:36,443 INFO L226 Difference]: Without dead ends: 7791 [2023-12-21 04:08:36,444 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 674 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=346, Invalid=3686, Unknown=0, NotChecked=0, Total=4032 [2023-12-21 04:08:36,444 INFO L413 NwaCegarLoop]: 229 mSDtfsCounter, 917 mSDsluCounter, 4402 mSDsCounter, 0 mSdLazyCounter, 3585 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 917 SdHoareTripleChecker+Valid, 4631 SdHoareTripleChecker+Invalid, 3655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 3585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-12-21 04:08:36,445 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [917 Valid, 4631 Invalid, 3655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 3585 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-12-21 04:08:36,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7791 states. [2023-12-21 04:08:37,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7791 to 1751. [2023-12-21 04:08:37,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1751 states, 1750 states have (on average 1.1125714285714285) internal successors, (1947), 1750 states have internal predecessors, (1947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:08:37,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1751 states to 1751 states and 1947 transitions. [2023-12-21 04:08:37,585 INFO L78 Accepts]: Start accepts. Automaton has 1751 states and 1947 transitions. Word has length 81 [2023-12-21 04:08:37,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:08:37,585 INFO L495 AbstractCegarLoop]: Abstraction has 1751 states and 1947 transitions. [2023-12-21 04:08:37,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.8529411764705883) internal successors, (131), 34 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:08:37,585 INFO L276 IsEmpty]: Start isEmpty. Operand 1751 states and 1947 transitions. [2023-12-21 04:08:37,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-12-21 04:08:37,587 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:08:37,587 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:08:37,593 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-12-21 04:08:37,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:08:37,788 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:08:37,788 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:08:37,788 INFO L85 PathProgramCache]: Analyzing trace with hash 1215683401, now seen corresponding path program 14 times [2023-12-21 04:08:37,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:08:37,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845437433] [2023-12-21 04:08:37,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:08:37,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:08:37,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:08:38,129 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-12-21 04:08:38,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:08:38,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845437433] [2023-12-21 04:08:38,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845437433] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:08:38,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243761089] [2023-12-21 04:08:38,130 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-21 04:08:38,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:08:38,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:08:38,131 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 04:08:38,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-12-21 04:08:38,220 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-21 04:08:38,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 04:08:38,222 INFO L262 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 44 conjunts are in the unsatisfiable core [2023-12-21 04:08:38,223 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:08:38,361 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-12-21 04:08:38,362 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 04:08:38,557 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-12-21 04:08:38,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243761089] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 04:08:38,557 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 04:08:38,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14, 11] total 26 [2023-12-21 04:08:38,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639638264] [2023-12-21 04:08:38,557 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 04:08:38,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-12-21 04:08:38,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:08:38,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-12-21 04:08:38,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2023-12-21 04:08:38,558 INFO L87 Difference]: Start difference. First operand 1751 states and 1947 transitions. Second operand has 26 states, 26 states have (on average 5.615384615384615) internal successors, (146), 26 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:08:41,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:08:41,554 INFO L93 Difference]: Finished difference Result 2831 states and 3160 transitions. [2023-12-21 04:08:41,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2023-12-21 04:08:41,555 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.615384615384615) internal successors, (146), 26 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2023-12-21 04:08:41,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:08:41,558 INFO L225 Difference]: With dead ends: 2831 [2023-12-21 04:08:41,558 INFO L226 Difference]: Without dead ends: 2819 [2023-12-21 04:08:41,559 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1121 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=386, Invalid=4170, Unknown=0, NotChecked=0, Total=4556 [2023-12-21 04:08:41,559 INFO L413 NwaCegarLoop]: 180 mSDtfsCounter, 595 mSDsluCounter, 2396 mSDsCounter, 0 mSdLazyCounter, 2199 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 595 SdHoareTripleChecker+Valid, 2576 SdHoareTripleChecker+Invalid, 2229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 2199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-21 04:08:41,559 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [595 Valid, 2576 Invalid, 2229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 2199 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-21 04:08:41,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2819 states. [2023-12-21 04:08:42,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2819 to 2026. [2023-12-21 04:08:42,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2026 states, 2025 states have (on average 1.1180246913580247) internal successors, (2264), 2025 states have internal predecessors, (2264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:08:42,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2026 states to 2026 states and 2264 transitions. [2023-12-21 04:08:42,909 INFO L78 Accepts]: Start accepts. Automaton has 2026 states and 2264 transitions. Word has length 82 [2023-12-21 04:08:42,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:08:42,909 INFO L495 AbstractCegarLoop]: Abstraction has 2026 states and 2264 transitions. [2023-12-21 04:08:42,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 5.615384615384615) internal successors, (146), 26 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:08:42,910 INFO L276 IsEmpty]: Start isEmpty. Operand 2026 states and 2264 transitions. [2023-12-21 04:08:42,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-12-21 04:08:42,912 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:08:42,912 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:08:42,916 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-12-21 04:08:43,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:08:43,113 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:08:43,114 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:08:43,114 INFO L85 PathProgramCache]: Analyzing trace with hash 1473848839, now seen corresponding path program 15 times [2023-12-21 04:08:43,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:08:43,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778417058] [2023-12-21 04:08:43,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:08:43,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:08:43,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:08:44,367 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 35 proven. 110 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-12-21 04:08:44,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:08:44,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778417058] [2023-12-21 04:08:44,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778417058] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:08:44,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314187567] [2023-12-21 04:08:44,367 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-21 04:08:44,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:08:44,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:08:44,368 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 04:08:44,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-12-21 04:08:44,697 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-12-21 04:08:44,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 04:08:44,701 INFO L262 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 119 conjunts are in the unsatisfiable core [2023-12-21 04:08:44,703 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:08:44,804 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-21 04:08:44,829 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-12-21 04:08:47,027 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 74 proven. 73 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-12-21 04:08:47,027 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 04:08:52,716 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 7 proven. 127 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2023-12-21 04:08:52,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314187567] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 04:08:52,717 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 04:08:52,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 32, 33] total 83 [2023-12-21 04:08:52,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115029316] [2023-12-21 04:08:52,717 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 04:08:52,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2023-12-21 04:08:52,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:08:52,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2023-12-21 04:08:52,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=943, Invalid=5863, Unknown=0, NotChecked=0, Total=6806 [2023-12-21 04:08:52,718 INFO L87 Difference]: Start difference. First operand 2026 states and 2264 transitions. Second operand has 83 states, 83 states have (on average 2.3012048192771086) internal successors, (191), 83 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:08:57,675 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.88s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-21 04:14:34,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:14:34,983 INFO L93 Difference]: Finished difference Result 9388 states and 10782 transitions. [2023-12-21 04:14:34,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 398 states. [2023-12-21 04:14:34,983 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 2.3012048192771086) internal successors, (191), 83 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2023-12-21 04:14:34,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:14:34,993 INFO L225 Difference]: With dead ends: 9388 [2023-12-21 04:14:34,993 INFO L226 Difference]: Without dead ends: 9206 [2023-12-21 04:14:35,012 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 577 GetRequests, 104 SyntacticMatches, 2 SemanticMatches, 471 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95018 ImplicationChecksByTransitivity, 321.9s TimeCoverageRelationStatistics Valid=20479, Invalid=202755, Unknown=22, NotChecked=0, Total=223256 [2023-12-21 04:14:35,012 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 4020 mSDsluCounter, 1828 mSDsCounter, 0 mSdLazyCounter, 4984 mSolverCounterSat, 874 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4020 SdHoareTripleChecker+Valid, 1882 SdHoareTripleChecker+Invalid, 5858 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 874 IncrementalHoareTripleChecker+Valid, 4984 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.5s IncrementalHoareTripleChecker+Time [2023-12-21 04:14:35,012 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4020 Valid, 1882 Invalid, 5858 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [874 Valid, 4984 Invalid, 0 Unknown, 0 Unchecked, 16.5s Time] [2023-12-21 04:14:35,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9206 states. [2023-12-21 04:14:36,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9206 to 1981. [2023-12-21 04:14:36,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1981 states, 1980 states have (on average 1.1161616161616161) internal successors, (2210), 1980 states have internal predecessors, (2210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:14:36,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1981 states to 1981 states and 2210 transitions. [2023-12-21 04:14:36,701 INFO L78 Accepts]: Start accepts. Automaton has 1981 states and 2210 transitions. Word has length 82 [2023-12-21 04:14:36,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:14:36,701 INFO L495 AbstractCegarLoop]: Abstraction has 1981 states and 2210 transitions. [2023-12-21 04:14:36,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 2.3012048192771086) internal successors, (191), 83 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:14:36,701 INFO L276 IsEmpty]: Start isEmpty. Operand 1981 states and 2210 transitions. [2023-12-21 04:14:36,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-12-21 04:14:36,703 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:14:36,703 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:14:36,709 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-12-21 04:14:36,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-12-21 04:14:36,909 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:14:36,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:14:36,910 INFO L85 PathProgramCache]: Analyzing trace with hash -999185725, now seen corresponding path program 16 times [2023-12-21 04:14:36,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:14:36,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968469506] [2023-12-21 04:14:36,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:14:36,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:14:36,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:14:38,739 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 21 proven. 127 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2023-12-21 04:14:38,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:14:38,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968469506] [2023-12-21 04:14:38,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968469506] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:14:38,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875149216] [2023-12-21 04:14:38,740 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-21 04:14:38,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:14:38,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:14:38,741 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 04:14:38,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-12-21 04:14:38,854 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-21 04:14:38,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 04:14:38,856 INFO L262 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 71 conjunts are in the unsatisfiable core [2023-12-21 04:14:38,858 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:14:39,599 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-21 04:14:39,601 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-12-21 04:14:39,622 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 21 proven. 146 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-12-21 04:14:39,622 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 04:14:40,077 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 04:14:40,077 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 58 [2023-12-21 04:14:40,083 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 04:14:40,084 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 35 [2023-12-21 04:14:40,327 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 21 proven. 115 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2023-12-21 04:14:40,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875149216] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 04:14:40,328 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 04:14:40,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 25, 15] total 54 [2023-12-21 04:14:40,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642867774] [2023-12-21 04:14:40,328 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 04:14:40,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2023-12-21 04:14:40,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:14:40,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2023-12-21 04:14:40,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=299, Invalid=2563, Unknown=0, NotChecked=0, Total=2862 [2023-12-21 04:14:40,330 INFO L87 Difference]: Start difference. First operand 1981 states and 2210 transitions. Second operand has 54 states, 54 states have (on average 3.1481481481481484) internal successors, (170), 54 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:14:46,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:14:46,949 INFO L93 Difference]: Finished difference Result 4090 states and 4674 transitions. [2023-12-21 04:14:46,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2023-12-21 04:14:46,949 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 3.1481481481481484) internal successors, (170), 54 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2023-12-21 04:14:46,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:14:46,954 INFO L225 Difference]: With dead ends: 4090 [2023-12-21 04:14:46,954 INFO L226 Difference]: Without dead ends: 3799 [2023-12-21 04:14:46,955 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 137 SyntacticMatches, 1 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2917 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1194, Invalid=9312, Unknown=0, NotChecked=0, Total=10506 [2023-12-21 04:14:46,956 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 671 mSDsluCounter, 1447 mSDsCounter, 0 mSdLazyCounter, 2375 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 671 SdHoareTripleChecker+Valid, 1514 SdHoareTripleChecker+Invalid, 2539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 2375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-12-21 04:14:46,956 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [671 Valid, 1514 Invalid, 2539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 2375 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-12-21 04:14:46,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3799 states. [2023-12-21 04:14:49,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3799 to 2739. [2023-12-21 04:14:49,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2739 states, 2738 states have (on average 1.1241782322863403) internal successors, (3078), 2738 states have internal predecessors, (3078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:14:49,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2739 states to 2739 states and 3078 transitions. [2023-12-21 04:14:49,295 INFO L78 Accepts]: Start accepts. Automaton has 2739 states and 3078 transitions. Word has length 82 [2023-12-21 04:14:49,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:14:49,295 INFO L495 AbstractCegarLoop]: Abstraction has 2739 states and 3078 transitions. [2023-12-21 04:14:49,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 3.1481481481481484) internal successors, (170), 54 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:14:49,295 INFO L276 IsEmpty]: Start isEmpty. Operand 2739 states and 3078 transitions. [2023-12-21 04:14:49,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-12-21 04:14:49,298 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:14:49,298 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:14:49,308 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-12-21 04:14:49,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:14:49,505 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:14:49,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:14:49,505 INFO L85 PathProgramCache]: Analyzing trace with hash -833704441, now seen corresponding path program 17 times [2023-12-21 04:14:49,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:14:49,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991866842] [2023-12-21 04:14:49,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:14:49,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:14:49,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:14:50,872 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 35 proven. 110 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-12-21 04:14:50,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:14:50,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991866842] [2023-12-21 04:14:50,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991866842] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:14:50,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567605164] [2023-12-21 04:14:50,873 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-21 04:14:50,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:14:50,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:14:50,874 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 04:14:50,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-12-21 04:15:08,624 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2023-12-21 04:15:08,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 04:15:08,632 INFO L262 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 76 conjunts are in the unsatisfiable core [2023-12-21 04:15:08,634 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:15:10,260 INFO L349 Elim1Store]: treesize reduction 19, result has 51.3 percent of original size [2023-12-21 04:15:10,261 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 49 [2023-12-21 04:15:10,267 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 04:15:10,267 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 27 [2023-12-21 04:15:10,384 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 28 proven. 132 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-12-21 04:15:10,385 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 04:15:12,305 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 04:15:12,306 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 147 treesize of output 121 [2023-12-21 04:15:12,346 INFO L349 Elim1Store]: treesize reduction 63, result has 33.7 percent of original size [2023-12-21 04:15:12,346 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 133 treesize of output 94 [2023-12-21 04:15:12,559 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 70 proven. 75 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-12-21 04:15:12,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567605164] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 04:15:12,559 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 04:15:12,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 28, 26] total 72 [2023-12-21 04:15:12,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049182609] [2023-12-21 04:15:12,560 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 04:15:12,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2023-12-21 04:15:12,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:15:12,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2023-12-21 04:15:12,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=657, Invalid=4454, Unknown=1, NotChecked=0, Total=5112 [2023-12-21 04:15:12,561 INFO L87 Difference]: Start difference. First operand 2739 states and 3078 transitions. Second operand has 72 states, 72 states have (on average 2.5694444444444446) internal successors, (185), 72 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:15:29,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:15:29,715 INFO L93 Difference]: Finished difference Result 5288 states and 6007 transitions. [2023-12-21 04:15:29,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 208 states. [2023-12-21 04:15:29,716 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 2.5694444444444446) internal successors, (185), 72 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2023-12-21 04:15:29,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:15:29,722 INFO L225 Difference]: With dead ends: 5288 [2023-12-21 04:15:29,722 INFO L226 Difference]: Without dead ends: 5167 [2023-12-21 04:15:29,725 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 388 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 270 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26716 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=6900, Invalid=66811, Unknown=1, NotChecked=0, Total=73712 [2023-12-21 04:15:29,725 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 2060 mSDsluCounter, 2099 mSDsCounter, 0 mSdLazyCounter, 5236 mSolverCounterSat, 392 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2060 SdHoareTripleChecker+Valid, 2194 SdHoareTripleChecker+Invalid, 5628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 392 IncrementalHoareTripleChecker+Valid, 5236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2023-12-21 04:15:29,726 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2060 Valid, 2194 Invalid, 5628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [392 Valid, 5236 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2023-12-21 04:15:29,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5167 states. [2023-12-21 04:15:32,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5167 to 2872. [2023-12-21 04:15:32,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2872 states, 2871 states have (on average 1.1239986067572274) internal successors, (3227), 2871 states have internal predecessors, (3227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:15:32,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2872 states to 2872 states and 3227 transitions. [2023-12-21 04:15:32,325 INFO L78 Accepts]: Start accepts. Automaton has 2872 states and 3227 transitions. Word has length 82 [2023-12-21 04:15:32,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:15:32,325 INFO L495 AbstractCegarLoop]: Abstraction has 2872 states and 3227 transitions. [2023-12-21 04:15:32,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 2.5694444444444446) internal successors, (185), 72 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:15:32,325 INFO L276 IsEmpty]: Start isEmpty. Operand 2872 states and 3227 transitions. [2023-12-21 04:15:32,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-12-21 04:15:32,328 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:15:32,328 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:15:32,340 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-12-21 04:15:32,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:15:32,536 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:15:32,536 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:15:32,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1255597373, now seen corresponding path program 18 times [2023-12-21 04:15:32,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:15:32,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784075452] [2023-12-21 04:15:32,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:15:32,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:15:32,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:15:34,483 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 21 proven. 127 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2023-12-21 04:15:34,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:15:34,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784075452] [2023-12-21 04:15:34,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784075452] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:15:34,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986138710] [2023-12-21 04:15:34,483 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-21 04:15:34,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:15:34,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:15:34,484 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 04:15:34,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-12-21 04:15:34,778 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2023-12-21 04:15:34,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 04:15:34,781 INFO L262 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 84 conjunts are in the unsatisfiable core [2023-12-21 04:15:34,783 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:15:34,856 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-12-21 04:15:34,876 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-12-21 04:15:35,890 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2023-12-21 04:15:35,932 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 21 proven. 140 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-21 04:15:35,932 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 04:15:37,963 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 04:15:37,963 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2023-12-21 04:15:38,894 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 7 proven. 139 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-12-21 04:15:38,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986138710] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 04:15:38,895 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 04:15:38,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 31, 26] total 78 [2023-12-21 04:15:38,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231695667] [2023-12-21 04:15:38,895 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 04:15:38,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2023-12-21 04:15:38,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:15:38,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2023-12-21 04:15:38,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=596, Invalid=5410, Unknown=0, NotChecked=0, Total=6006 [2023-12-21 04:15:38,896 INFO L87 Difference]: Start difference. First operand 2872 states and 3227 transitions. Second operand has 78 states, 78 states have (on average 2.576923076923077) internal successors, (201), 78 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:16:00,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:16:00,419 INFO L93 Difference]: Finished difference Result 8984 states and 10334 transitions. [2023-12-21 04:16:00,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 167 states. [2023-12-21 04:16:00,419 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 2.576923076923077) internal successors, (201), 78 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2023-12-21 04:16:00,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:16:00,424 INFO L225 Difference]: With dead ends: 8984 [2023-12-21 04:16:00,424 INFO L226 Difference]: Without dead ends: 5855 [2023-12-21 04:16:00,428 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 241 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19869 ImplicationChecksByTransitivity, 14.9s TimeCoverageRelationStatistics Valid=4617, Invalid=54189, Unknown=0, NotChecked=0, Total=58806 [2023-12-21 04:16:00,428 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 1361 mSDsluCounter, 2675 mSDsCounter, 0 mSdLazyCounter, 5385 mSolverCounterSat, 247 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1361 SdHoareTripleChecker+Valid, 2758 SdHoareTripleChecker+Invalid, 5632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 247 IncrementalHoareTripleChecker+Valid, 5385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2023-12-21 04:16:00,429 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1361 Valid, 2758 Invalid, 5632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [247 Valid, 5385 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2023-12-21 04:16:00,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5855 states. [2023-12-21 04:16:03,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5855 to 2892. [2023-12-21 04:16:03,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2892 states, 2891 states have (on average 1.1331719128329298) internal successors, (3276), 2891 states have internal predecessors, (3276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:16:03,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2892 states to 2892 states and 3276 transitions. [2023-12-21 04:16:03,252 INFO L78 Accepts]: Start accepts. Automaton has 2892 states and 3276 transitions. Word has length 82 [2023-12-21 04:16:03,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:16:03,252 INFO L495 AbstractCegarLoop]: Abstraction has 2892 states and 3276 transitions. [2023-12-21 04:16:03,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 2.576923076923077) internal successors, (201), 78 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:16:03,252 INFO L276 IsEmpty]: Start isEmpty. Operand 2892 states and 3276 transitions. [2023-12-21 04:16:03,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2023-12-21 04:16:03,255 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:16:03,255 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:16:03,261 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-12-21 04:16:03,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-12-21 04:16:03,461 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:16:03,461 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:16:03,462 INFO L85 PathProgramCache]: Analyzing trace with hash -1535141732, now seen corresponding path program 19 times [2023-12-21 04:16:03,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:16:03,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469105448] [2023-12-21 04:16:03,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:16:03,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:16:03,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:16:03,768 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2023-12-21 04:16:03,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:16:03,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469105448] [2023-12-21 04:16:03,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469105448] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:16:03,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687952658] [2023-12-21 04:16:03,768 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-21 04:16:03,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:16:03,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:16:03,769 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 04:16:03,770 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-12-21 04:16:03,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:16:03,889 INFO L262 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 50 conjunts are in the unsatisfiable core [2023-12-21 04:16:03,891 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:16:03,961 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-21 04:16:04,375 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2023-12-21 04:16:04,392 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 0 proven. 203 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2023-12-21 04:16:04,392 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 04:16:05,203 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 40 proven. 148 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2023-12-21 04:16:05,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687952658] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 04:16:05,203 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 04:16:05,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 20, 15] total 45 [2023-12-21 04:16:05,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812570165] [2023-12-21 04:16:05,204 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 04:16:05,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-12-21 04:16:05,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:16:05,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-12-21 04:16:05,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1795, Unknown=0, NotChecked=0, Total=1980 [2023-12-21 04:16:05,205 INFO L87 Difference]: Start difference. First operand 2892 states and 3276 transitions. Second operand has 45 states, 45 states have (on average 3.888888888888889) internal successors, (175), 45 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:16:21,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:16:21,762 INFO L93 Difference]: Finished difference Result 22766 states and 26122 transitions. [2023-12-21 04:16:21,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2023-12-21 04:16:21,763 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 3.888888888888889) internal successors, (175), 45 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2023-12-21 04:16:21,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:16:21,783 INFO L225 Difference]: With dead ends: 22766 [2023-12-21 04:16:21,783 INFO L226 Difference]: Without dead ends: 20299 [2023-12-21 04:16:21,789 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1219 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=695, Invalid=5625, Unknown=0, NotChecked=0, Total=6320 [2023-12-21 04:16:21,789 INFO L413 NwaCegarLoop]: 284 mSDtfsCounter, 1180 mSDsluCounter, 6603 mSDsCounter, 0 mSdLazyCounter, 5265 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1180 SdHoareTripleChecker+Valid, 6887 SdHoareTripleChecker+Invalid, 5332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 5265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-12-21 04:16:21,789 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1180 Valid, 6887 Invalid, 5332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 5265 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-12-21 04:16:21,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20299 states. [2023-12-21 04:16:25,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20299 to 4890. [2023-12-21 04:16:25,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4890 states, 4889 states have (on average 1.110247494375128) internal successors, (5428), 4889 states have internal predecessors, (5428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:16:25,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4890 states to 4890 states and 5428 transitions. [2023-12-21 04:16:25,403 INFO L78 Accepts]: Start accepts. Automaton has 4890 states and 5428 transitions. Word has length 93 [2023-12-21 04:16:25,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:16:25,403 INFO L495 AbstractCegarLoop]: Abstraction has 4890 states and 5428 transitions. [2023-12-21 04:16:25,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 3.888888888888889) internal successors, (175), 45 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:16:25,403 INFO L276 IsEmpty]: Start isEmpty. Operand 4890 states and 5428 transitions. [2023-12-21 04:16:25,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-12-21 04:16:25,409 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:16:25,409 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:16:25,414 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-12-21 04:16:25,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-12-21 04:16:25,609 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:16:25,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:16:25,610 INFO L85 PathProgramCache]: Analyzing trace with hash 1040031112, now seen corresponding path program 20 times [2023-12-21 04:16:25,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:16:25,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902624058] [2023-12-21 04:16:25,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:16:25,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:16:25,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:16:26,009 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 0 proven. 252 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2023-12-21 04:16:26,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:16:26,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902624058] [2023-12-21 04:16:26,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902624058] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:16:26,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008935302] [2023-12-21 04:16:26,009 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-21 04:16:26,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:16:26,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:16:26,010 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 04:16:26,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-12-21 04:16:26,141 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-21 04:16:26,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 04:16:26,143 INFO L262 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 54 conjunts are in the unsatisfiable core [2023-12-21 04:16:26,144 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:16:26,348 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 0 proven. 266 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-12-21 04:16:26,349 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 04:16:26,618 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 0 proven. 252 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2023-12-21 04:16:26,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008935302] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 04:16:26,618 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 04:16:26,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17, 13] total 32 [2023-12-21 04:16:26,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521948348] [2023-12-21 04:16:26,618 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 04:16:26,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-12-21 04:16:26,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:16:26,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-12-21 04:16:26,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=902, Unknown=0, NotChecked=0, Total=992 [2023-12-21 04:16:26,620 INFO L87 Difference]: Start difference. First operand 4890 states and 5428 transitions. Second operand has 32 states, 32 states have (on average 5.78125) internal successors, (185), 32 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:16:35,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:16:35,600 INFO L93 Difference]: Finished difference Result 8014 states and 8950 transitions. [2023-12-21 04:16:35,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2023-12-21 04:16:35,601 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 5.78125) internal successors, (185), 32 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 103 [2023-12-21 04:16:35,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:16:35,608 INFO L225 Difference]: With dead ends: 8014 [2023-12-21 04:16:35,608 INFO L226 Difference]: Without dead ends: 8010 [2023-12-21 04:16:35,609 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3296 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=659, Invalid=10683, Unknown=0, NotChecked=0, Total=11342 [2023-12-21 04:16:35,610 INFO L413 NwaCegarLoop]: 319 mSDtfsCounter, 936 mSDsluCounter, 5202 mSDsCounter, 0 mSdLazyCounter, 4957 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 936 SdHoareTripleChecker+Valid, 5521 SdHoareTripleChecker+Invalid, 5014 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 4957 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-12-21 04:16:35,610 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [936 Valid, 5521 Invalid, 5014 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 4957 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-12-21 04:16:35,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8010 states. [2023-12-21 04:16:39,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8010 to 5515. [2023-12-21 04:16:39,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5515 states, 5514 states have (on average 1.1142546245919478) internal successors, (6144), 5514 states have internal predecessors, (6144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:16:39,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5515 states to 5515 states and 6144 transitions. [2023-12-21 04:16:39,572 INFO L78 Accepts]: Start accepts. Automaton has 5515 states and 6144 transitions. Word has length 103 [2023-12-21 04:16:39,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:16:39,572 INFO L495 AbstractCegarLoop]: Abstraction has 5515 states and 6144 transitions. [2023-12-21 04:16:39,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 5.78125) internal successors, (185), 32 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:16:39,572 INFO L276 IsEmpty]: Start isEmpty. Operand 5515 states and 6144 transitions. [2023-12-21 04:16:39,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-12-21 04:16:39,578 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:16:39,578 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:16:39,583 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2023-12-21 04:16:39,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-12-21 04:16:39,784 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:16:39,784 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:16:39,784 INFO L85 PathProgramCache]: Analyzing trace with hash 1298196550, now seen corresponding path program 21 times [2023-12-21 04:16:39,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:16:39,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629520989] [2023-12-21 04:16:39,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:16:39,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:16:39,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:16:41,562 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 50 proven. 223 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-12-21 04:16:41,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:16:41,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629520989] [2023-12-21 04:16:41,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629520989] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:16:41,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311297910] [2023-12-21 04:16:41,562 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-21 04:16:41,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:16:41,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:16:41,563 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 04:16:41,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-12-21 04:16:42,471 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2023-12-21 04:16:42,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 04:16:42,478 INFO L262 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 129 conjunts are in the unsatisfiable core [2023-12-21 04:16:42,482 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:16:42,605 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-21 04:16:42,637 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-21 04:16:51,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-21 04:16:51,513 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-21 04:16:51,515 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 04:16:51,515 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 17 [2023-12-21 04:16:51,557 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 52 proven. 249 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-12-21 04:16:51,558 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 04:16:54,580 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 18 proven. 246 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-12-21 04:16:54,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311297910] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 04:16:54,581 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 04:16:54,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 41, 30] total 92 [2023-12-21 04:16:54,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840793226] [2023-12-21 04:16:54,581 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 04:16:54,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2023-12-21 04:16:54,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:16:54,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2023-12-21 04:16:54,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1191, Invalid=7175, Unknown=6, NotChecked=0, Total=8372 [2023-12-21 04:16:54,583 INFO L87 Difference]: Start difference. First operand 5515 states and 6144 transitions. Second operand has 92 states, 92 states have (on average 2.6956521739130435) internal successors, (248), 92 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:17:20,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:17:20,328 INFO L93 Difference]: Finished difference Result 6221 states and 6867 transitions. [2023-12-21 04:17:20,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2023-12-21 04:17:20,328 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 2.6956521739130435) internal successors, (248), 92 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 103 [2023-12-21 04:17:20,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:17:20,330 INFO L225 Difference]: With dead ends: 6221 [2023-12-21 04:17:20,330 INFO L226 Difference]: Without dead ends: 1869 [2023-12-21 04:17:20,333 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 142 SyntacticMatches, 2 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10785 ImplicationChecksByTransitivity, 19.9s TimeCoverageRelationStatistics Valid=4142, Invalid=29516, Unknown=14, NotChecked=0, Total=33672 [2023-12-21 04:17:20,333 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 1283 mSDsluCounter, 1092 mSDsCounter, 0 mSdLazyCounter, 3395 mSolverCounterSat, 278 mSolverCounterUnsat, 17 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1283 SdHoareTripleChecker+Valid, 1123 SdHoareTripleChecker+Invalid, 3690 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 278 IncrementalHoareTripleChecker+Valid, 3395 IncrementalHoareTripleChecker+Invalid, 17 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.4s IncrementalHoareTripleChecker+Time [2023-12-21 04:17:20,334 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1283 Valid, 1123 Invalid, 3690 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [278 Valid, 3395 Invalid, 17 Unknown, 0 Unchecked, 12.4s Time] [2023-12-21 04:17:20,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1869 states. [2023-12-21 04:17:22,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1869 to 1665. [2023-12-21 04:17:22,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1665 states, 1664 states have (on average 1.0486778846153846) internal successors, (1745), 1664 states have internal predecessors, (1745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:17:22,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1665 states to 1665 states and 1745 transitions. [2023-12-21 04:17:22,060 INFO L78 Accepts]: Start accepts. Automaton has 1665 states and 1745 transitions. Word has length 103 [2023-12-21 04:17:22,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:17:22,060 INFO L495 AbstractCegarLoop]: Abstraction has 1665 states and 1745 transitions. [2023-12-21 04:17:22,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 2.6956521739130435) internal successors, (248), 92 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:17:22,060 INFO L276 IsEmpty]: Start isEmpty. Operand 1665 states and 1745 transitions. [2023-12-21 04:17:22,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-12-21 04:17:22,062 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:17:22,062 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:17:22,071 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2023-12-21 04:17:22,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:17:22,264 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:17:22,264 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:17:22,265 INFO L85 PathProgramCache]: Analyzing trace with hash 1258885830, now seen corresponding path program 22 times [2023-12-21 04:17:22,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:17:22,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924991379] [2023-12-21 04:17:22,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:17:22,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:17:22,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:17:23,754 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 82 proven. 175 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2023-12-21 04:17:23,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:17:23,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924991379] [2023-12-21 04:17:23,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924991379] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:17:23,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754049685] [2023-12-21 04:17:23,754 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-21 04:17:23,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:17:23,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:17:23,755 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 04:17:23,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-12-21 04:17:23,886 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-21 04:17:23,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 04:17:23,889 INFO L262 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 75 conjunts are in the unsatisfiable core [2023-12-21 04:17:23,892 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:17:24,509 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-21 04:17:24,510 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-12-21 04:17:24,524 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 82 proven. 181 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-12-21 04:17:24,524 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 04:17:24,893 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 04:17:24,893 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 58 [2023-12-21 04:17:24,899 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 04:17:24,899 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 35 [2023-12-21 04:17:25,064 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 81 proven. 146 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2023-12-21 04:17:25,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754049685] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 04:17:25,065 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 04:17:25,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 25, 14] total 48 [2023-12-21 04:17:25,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614622577] [2023-12-21 04:17:25,065 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 04:17:25,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-12-21 04:17:25,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:17:25,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-12-21 04:17:25,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=1986, Unknown=0, NotChecked=0, Total=2256 [2023-12-21 04:17:25,066 INFO L87 Difference]: Start difference. First operand 1665 states and 1745 transitions. Second operand has 48 states, 48 states have (on average 3.5416666666666665) internal successors, (170), 48 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:17:27,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:17:27,909 INFO L93 Difference]: Finished difference Result 1820 states and 1902 transitions. [2023-12-21 04:17:27,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-12-21 04:17:27,910 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 3.5416666666666665) internal successors, (170), 48 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 103 [2023-12-21 04:17:27,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:17:27,911 INFO L225 Difference]: With dead ends: 1820 [2023-12-21 04:17:27,911 INFO L226 Difference]: Without dead ends: 1615 [2023-12-21 04:17:27,912 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 183 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1311 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=589, Invalid=3967, Unknown=0, NotChecked=0, Total=4556 [2023-12-21 04:17:27,912 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 557 mSDsluCounter, 776 mSDsCounter, 0 mSdLazyCounter, 1400 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 557 SdHoareTripleChecker+Valid, 818 SdHoareTripleChecker+Invalid, 1488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 1400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-21 04:17:27,912 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [557 Valid, 818 Invalid, 1488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 1400 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-21 04:17:27,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1615 states. [2023-12-21 04:17:29,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1615 to 1580. [2023-12-21 04:17:29,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1580 states, 1579 states have (on average 1.0449651678277392) internal successors, (1650), 1579 states have internal predecessors, (1650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:17:29,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1580 states to 1580 states and 1650 transitions. [2023-12-21 04:17:29,521 INFO L78 Accepts]: Start accepts. Automaton has 1580 states and 1650 transitions. Word has length 103 [2023-12-21 04:17:29,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:17:29,521 INFO L495 AbstractCegarLoop]: Abstraction has 1580 states and 1650 transitions. [2023-12-21 04:17:29,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 3.5416666666666665) internal successors, (170), 48 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:17:29,521 INFO L276 IsEmpty]: Start isEmpty. Operand 1580 states and 1650 transitions. [2023-12-21 04:17:29,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-12-21 04:17:29,523 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:17:29,523 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:17:29,529 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2023-12-21 04:17:29,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-12-21 04:17:29,724 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:17:29,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:17:29,724 INFO L85 PathProgramCache]: Analyzing trace with hash -92165630, now seen corresponding path program 23 times [2023-12-21 04:17:29,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:17:29,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252021348] [2023-12-21 04:17:29,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:17:29,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:17:29,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:17:31,557 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 29 proven. 227 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2023-12-21 04:17:31,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:17:31,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252021348] [2023-12-21 04:17:31,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252021348] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:17:31,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855442865] [2023-12-21 04:17:31,558 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-21 04:17:31,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:17:31,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:17:31,559 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 04:17:31,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-12-21 04:17:41,579 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2023-12-21 04:17:41,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 04:17:41,588 INFO L262 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 80 conjunts are in the unsatisfiable core [2023-12-21 04:17:41,591 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:17:41,661 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-12-21 04:17:42,269 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-21 04:17:42,271 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 04:17:42,271 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 16 [2023-12-21 04:17:42,273 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2023-12-21 04:17:42,293 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 30 proven. 268 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-12-21 04:17:42,293 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 04:17:42,944 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 04:17:42,945 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 58 [2023-12-21 04:17:43,627 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 39 proven. 226 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-12-21 04:17:43,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855442865] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 04:17:43,628 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 04:17:43,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 25, 22] total 62 [2023-12-21 04:17:43,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366282594] [2023-12-21 04:17:43,628 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 04:17:43,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2023-12-21 04:17:43,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:17:43,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2023-12-21 04:17:43,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=3404, Unknown=0, NotChecked=0, Total=3782 [2023-12-21 04:17:43,629 INFO L87 Difference]: Start difference. First operand 1580 states and 1650 transitions. Second operand has 62 states, 62 states have (on average 3.8870967741935485) internal successors, (241), 62 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:17:48,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:17:48,044 INFO L93 Difference]: Finished difference Result 1630 states and 1701 transitions. [2023-12-21 04:17:48,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-12-21 04:17:48,044 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 3.8870967741935485) internal successors, (241), 62 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 103 [2023-12-21 04:17:48,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:17:48,045 INFO L225 Difference]: With dead ends: 1630 [2023-12-21 04:17:48,045 INFO L226 Difference]: Without dead ends: 1307 [2023-12-21 04:17:48,046 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 167 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2809 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=971, Invalid=8341, Unknown=0, NotChecked=0, Total=9312 [2023-12-21 04:17:48,046 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 311 mSDsluCounter, 1048 mSDsCounter, 0 mSdLazyCounter, 1943 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 1096 SdHoareTripleChecker+Invalid, 2117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 1943 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-12-21 04:17:48,047 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [311 Valid, 1096 Invalid, 2117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 1943 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-12-21 04:17:48,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1307 states. [2023-12-21 04:17:49,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1307 to 1292. [2023-12-21 04:17:49,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1292 states, 1291 states have (on average 1.0395042602633617) internal successors, (1342), 1291 states have internal predecessors, (1342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:17:49,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1292 states to 1292 states and 1342 transitions. [2023-12-21 04:17:49,385 INFO L78 Accepts]: Start accepts. Automaton has 1292 states and 1342 transitions. Word has length 103 [2023-12-21 04:17:49,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:17:49,385 INFO L495 AbstractCegarLoop]: Abstraction has 1292 states and 1342 transitions. [2023-12-21 04:17:49,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 3.8870967741935485) internal successors, (241), 62 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:17:49,385 INFO L276 IsEmpty]: Start isEmpty. Operand 1292 states and 1342 transitions. [2023-12-21 04:17:49,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-12-21 04:17:49,386 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:17:49,386 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:17:49,394 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2023-12-21 04:17:49,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-12-21 04:17:49,588 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:17:49,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:17:49,588 INFO L85 PathProgramCache]: Analyzing trace with hash 1916050118, now seen corresponding path program 24 times [2023-12-21 04:17:49,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:17:49,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166085800] [2023-12-21 04:17:49,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:17:49,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:17:49,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:17:50,803 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 50 proven. 203 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2023-12-21 04:17:50,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:17:50,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166085800] [2023-12-21 04:17:50,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166085800] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:17:50,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961059514] [2023-12-21 04:17:50,803 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-21 04:17:50,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:17:50,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:17:50,804 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 04:17:50,805 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-12-21 04:17:51,393 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2023-12-21 04:17:51,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 04:17:51,398 INFO L262 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 124 conjunts are in the unsatisfiable core [2023-12-21 04:17:51,401 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:17:51,514 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-21 04:17:58,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-21 04:17:58,990 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-21 04:17:58,992 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 04:17:58,992 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 18 [2023-12-21 04:17:58,995 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 04:17:58,996 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 11 [2023-12-21 04:17:59,047 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 51 proven. 251 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-12-21 04:17:59,047 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 04:18:02,644 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 44 proven. 225 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-12-21 04:18:02,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961059514] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 04:18:02,644 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 04:18:02,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 37, 33] total 83 [2023-12-21 04:18:02,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764034424] [2023-12-21 04:18:02,645 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 04:18:02,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2023-12-21 04:18:02,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:18:02,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2023-12-21 04:18:02,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=951, Invalid=5848, Unknown=7, NotChecked=0, Total=6806 [2023-12-21 04:18:02,646 INFO L87 Difference]: Start difference. First operand 1292 states and 1342 transitions. Second operand has 83 states, 83 states have (on average 2.927710843373494) internal successors, (243), 83 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:18:11,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:18:11,000 INFO L93 Difference]: Finished difference Result 1364 states and 1413 transitions. [2023-12-21 04:18:11,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2023-12-21 04:18:11,000 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 2.927710843373494) internal successors, (243), 83 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 103 [2023-12-21 04:18:11,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:18:11,001 INFO L225 Difference]: With dead ends: 1364 [2023-12-21 04:18:11,002 INFO L226 Difference]: Without dead ends: 1333 [2023-12-21 04:18:11,003 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 144 SyntacticMatches, 1 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8798 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=3649, Invalid=23734, Unknown=7, NotChecked=0, Total=27390 [2023-12-21 04:18:11,003 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 1101 mSDsluCounter, 929 mSDsCounter, 0 mSdLazyCounter, 2750 mSolverCounterSat, 199 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1101 SdHoareTripleChecker+Valid, 972 SdHoareTripleChecker+Invalid, 2950 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 2750 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-12-21 04:18:11,003 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1101 Valid, 972 Invalid, 2950 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [199 Valid, 2750 Invalid, 1 Unknown, 0 Unchecked, 2.6s Time] [2023-12-21 04:18:11,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1333 states. [2023-12-21 04:18:12,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1333 to 1074. [2023-12-21 04:18:12,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1074 states, 1073 states have (on average 1.0400745573159367) internal successors, (1116), 1073 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:18:12,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1074 states to 1074 states and 1116 transitions. [2023-12-21 04:18:12,144 INFO L78 Accepts]: Start accepts. Automaton has 1074 states and 1116 transitions. Word has length 103 [2023-12-21 04:18:12,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:18:12,144 INFO L495 AbstractCegarLoop]: Abstraction has 1074 states and 1116 transitions. [2023-12-21 04:18:12,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 2.927710843373494) internal successors, (243), 83 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:18:12,144 INFO L276 IsEmpty]: Start isEmpty. Operand 1074 states and 1116 transitions. [2023-12-21 04:18:12,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-12-21 04:18:12,146 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:18:12,146 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:18:12,152 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2023-12-21 04:18:12,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:18:12,352 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:18:12,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:18:12,353 INFO L85 PathProgramCache]: Analyzing trace with hash 1494157186, now seen corresponding path program 25 times [2023-12-21 04:18:12,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:18:12,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533784715] [2023-12-21 04:18:12,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:18:12,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:18:12,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:18:14,848 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 29 proven. 247 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-12-21 04:18:14,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:18:14,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533784715] [2023-12-21 04:18:14,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533784715] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:18:14,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975158661] [2023-12-21 04:18:14,849 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-21 04:18:14,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:18:14,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:18:14,850 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 04:18:14,850 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-12-21 04:18:14,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:18:14,988 INFO L262 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 63 conjunts are in the unsatisfiable core [2023-12-21 04:18:14,990 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:18:15,690 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2023-12-21 04:18:15,692 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2023-12-21 04:18:15,709 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 29 proven. 254 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-12-21 04:18:15,709 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 04:18:16,244 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 04:18:16,244 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 42 [2023-12-21 04:18:16,251 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 04:18:16,251 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2023-12-21 04:18:16,554 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 33 proven. 228 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-12-21 04:18:16,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975158661] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 04:18:16,554 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 04:18:16,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 20, 19] total 56 [2023-12-21 04:18:16,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723100638] [2023-12-21 04:18:16,555 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 04:18:16,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2023-12-21 04:18:16,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:18:16,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2023-12-21 04:18:16,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=297, Invalid=2783, Unknown=0, NotChecked=0, Total=3080 [2023-12-21 04:18:16,556 INFO L87 Difference]: Start difference. First operand 1074 states and 1116 transitions. Second operand has 56 states, 56 states have (on average 3.767857142857143) internal successors, (211), 56 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:18:19,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:18:19,854 INFO L93 Difference]: Finished difference Result 1201 states and 1241 transitions. [2023-12-21 04:18:19,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-12-21 04:18:19,854 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 3.767857142857143) internal successors, (211), 56 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 103 [2023-12-21 04:18:19,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:18:19,855 INFO L225 Difference]: With dead ends: 1201 [2023-12-21 04:18:19,855 INFO L226 Difference]: Without dead ends: 644 [2023-12-21 04:18:19,856 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 180 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1866 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=731, Invalid=5911, Unknown=0, NotChecked=0, Total=6642 [2023-12-21 04:18:19,856 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 522 mSDsluCounter, 876 mSDsCounter, 0 mSdLazyCounter, 1595 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 522 SdHoareTripleChecker+Valid, 918 SdHoareTripleChecker+Invalid, 1737 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 1595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-21 04:18:19,856 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [522 Valid, 918 Invalid, 1737 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 1595 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-12-21 04:18:19,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 644 states. [2023-12-21 04:18:20,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 644 to 632. [2023-12-21 04:18:20,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 632 states, 631 states have (on average 1.0332805071315372) internal successors, (652), 631 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:18:20,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 632 states to 632 states and 652 transitions. [2023-12-21 04:18:20,550 INFO L78 Accepts]: Start accepts. Automaton has 632 states and 652 transitions. Word has length 103 [2023-12-21 04:18:20,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:18:20,550 INFO L495 AbstractCegarLoop]: Abstraction has 632 states and 652 transitions. [2023-12-21 04:18:20,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 3.767857142857143) internal successors, (211), 56 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:18:20,551 INFO L276 IsEmpty]: Start isEmpty. Operand 632 states and 652 transitions. [2023-12-21 04:18:20,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-12-21 04:18:20,551 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:18:20,551 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:18:20,559 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2023-12-21 04:18:20,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2023-12-21 04:18:20,752 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:18:20,752 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:18:20,752 INFO L85 PathProgramCache]: Analyzing trace with hash 80717698, now seen corresponding path program 26 times [2023-12-21 04:18:20,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:18:20,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251349167] [2023-12-21 04:18:20,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:18:20,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:18:20,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:18:21,916 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 82 proven. 155 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2023-12-21 04:18:21,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:18:21,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251349167] [2023-12-21 04:18:21,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251349167] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:18:21,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912576488] [2023-12-21 04:18:21,917 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-21 04:18:21,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:18:21,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:18:21,918 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 04:18:21,918 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-12-21 04:18:22,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-21 04:18:22,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 04:18:22,051 INFO L262 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 64 conjunts are in the unsatisfiable core [2023-12-21 04:18:22,053 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:18:22,646 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2023-12-21 04:18:22,647 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2023-12-21 04:18:22,668 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 82 proven. 177 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2023-12-21 04:18:22,668 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 04:18:23,146 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 04:18:23,146 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2023-12-21 04:18:23,154 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 04:18:23,154 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 42 [2023-12-21 04:18:23,396 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 85 proven. 154 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2023-12-21 04:18:23,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912576488] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 04:18:23,396 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 04:18:23,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21, 17] total 41 [2023-12-21 04:18:23,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997771294] [2023-12-21 04:18:23,396 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 04:18:23,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-12-21 04:18:23,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:18:23,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-12-21 04:18:23,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=1410, Unknown=0, NotChecked=0, Total=1640 [2023-12-21 04:18:23,398 INFO L87 Difference]: Start difference. First operand 632 states and 652 transitions. Second operand has 41 states, 41 states have (on average 4.121951219512195) internal successors, (169), 41 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:18:24,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:18:24,849 INFO L93 Difference]: Finished difference Result 632 states and 652 transitions. [2023-12-21 04:18:24,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-12-21 04:18:24,849 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 4.121951219512195) internal successors, (169), 41 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 103 [2023-12-21 04:18:24,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:18:24,849 INFO L225 Difference]: With dead ends: 632 [2023-12-21 04:18:24,849 INFO L226 Difference]: Without dead ends: 0 [2023-12-21 04:18:24,850 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 183 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 938 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=472, Invalid=2950, Unknown=0, NotChecked=0, Total=3422 [2023-12-21 04:18:24,850 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 57 mSDsluCounter, 393 mSDsCounter, 0 mSdLazyCounter, 877 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 912 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 877 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-21 04:18:24,850 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 423 Invalid, 912 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 877 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-21 04:18:24,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-12-21 04:18:24,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-12-21 04:18:24,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:18:24,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-12-21 04:18:24,851 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 103 [2023-12-21 04:18:24,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:18:24,851 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-12-21 04:18:24,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 4.121951219512195) internal successors, (169), 41 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:18:24,851 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-12-21 04:18:24,851 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-12-21 04:18:24,853 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-21 04:18:24,862 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2023-12-21 04:18:25,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:18:25,061 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. Received shutdown request... [2023-12-21 04:20:49,039 WARN L619 AbstractCegarLoop]: Verification canceled: while PolyPacSimplificationTermWalker was simplifying a ∨-314-28-16-26-9-22-9-18-12-14-12-16-14-18-16-16-16-13-16-13-16-13-14-13-16-13-16-12-16-12-16-10-16-10-16-10-16-10-16-8-16-10-16-10-12-8-16-8-16-7-16-7-16-7-16-6-16-5-16-5-9-4-3-4-3-4-1 term,while PolyPacSimplificationTermWalker was simplifying 3 xjuncts wrt. a ∧-406-28-16-26-12-22-12-18-12-18-12-18-14-18-16-16-16-13-16-13-16-13-14-13-16-13-16-12-16-12-16-10-16-10-16-10-16-10-16-8-16-10-16-10-12-8-16-8-16-7-16-7-16-7-16-6-16-5-16-5-9-4-3-4-3-4-1 context. [2023-12-21 04:20:49,040 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2023-12-21 04:20:49,055 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-21 04:20:49,434 INFO L257 ToolchainWalker]: Toolchain cancelled while executing plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction. Reason: Timeout or Toolchain cancelled by user [2023-12-21 04:20:49,435 INFO L158 Benchmark]: Toolchain (without parser) took 850063.68ms. Allocated memory was 260.0MB in the beginning and 1.6GB in the end (delta: 1.4GB). Free memory was 214.2MB in the beginning and 1.2GB in the end (delta: -1.0GB). Peak memory consumption was 1.1GB. Max. memory is 8.0GB. [2023-12-21 04:20:49,435 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 192.9MB. Free memory is still 142.7MB. There was no memory consumed. Max. memory is 8.0GB. [2023-12-21 04:20:49,435 INFO L158 Benchmark]: CACSL2BoogieTranslator took 242.78ms. Allocated memory is still 260.0MB. Free memory was 213.9MB in the beginning and 201.8MB in the end (delta: 12.1MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-12-21 04:20:49,436 INFO L158 Benchmark]: Boogie Procedure Inliner took 46.36ms. Allocated memory is still 260.0MB. Free memory was 201.8MB in the beginning and 200.0MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-21 04:20:49,436 INFO L158 Benchmark]: Boogie Preprocessor took 48.48ms. Allocated memory is still 260.0MB. Free memory was 200.0MB in the beginning and 197.6MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-21 04:20:49,436 INFO L158 Benchmark]: RCFGBuilder took 263.73ms. Allocated memory is still 260.0MB. Free memory was 197.6MB in the beginning and 182.8MB in the end (delta: 14.8MB). Peak memory consumption was 14.7MB. Max. memory is 8.0GB. [2023-12-21 04:20:49,436 INFO L158 Benchmark]: TraceAbstraction took 849458.42ms. Allocated memory was 260.0MB in the beginning and 1.6GB in the end (delta: 1.4GB). Free memory was 182.2MB in the beginning and 1.2GB in the end (delta: -1.1GB). Peak memory consumption was 1.1GB. Max. memory is 8.0GB. [2023-12-21 04:20:49,436 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 192.9MB. Free memory is still 142.7MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 242.78ms. Allocated memory is still 260.0MB. Free memory was 213.9MB in the beginning and 201.8MB in the end (delta: 12.1MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 46.36ms. Allocated memory is still 260.0MB. Free memory was 201.8MB in the beginning and 200.0MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 48.48ms. Allocated memory is still 260.0MB. Free memory was 200.0MB in the beginning and 197.6MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 263.73ms. Allocated memory is still 260.0MB. Free memory was 197.6MB in the beginning and 182.8MB in the end (delta: 14.8MB). Peak memory consumption was 14.7MB. Max. memory is 8.0GB. * TraceAbstraction took 849458.42ms. Allocated memory was 260.0MB in the beginning and 1.6GB in the end (delta: 1.4GB). Free memory was 182.2MB in the beginning and 1.2GB in the end (delta: -1.1GB). Peak memory consumption was 1.1GB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResult: Timeout (de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction) Toolchain cancelled while PolyPacSimplificationTermWalker was simplifying a ∨-314-28-16-26-9-22-9-18-12-14-12-16-14-18-16-16-16-13-16-13-16-13-14-13-16-13-16-12-16-12-16-10-16-10-16-10-16-10-16-8-16-10-16-10-12-8-16-8-16-7-16-7-16-7-16-6-16-5-16-5-9-4-3-4-3-4-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∧-326-28-16-26-9-22-9-18-12-14-12-16-18-18-16-16-16-13-16-13-16-13-14-13-16-13-16-12-16-12-16-10-16-12-16-12-16-12-16-12-16-10-16-10-12-8-16-8-16-7-16-7-16-7-16-6-16-5-16-5-9-4-3-4-3-4-1 context. RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown