/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.use.bitabs.translation true -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/array-tiling/nr3.c -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-18 18:28:43,327 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-18 18:28:43,390 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-12-18 18:28:43,394 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-18 18:28:43,394 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-18 18:28:43,422 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-18 18:28:43,422 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-18 18:28:43,422 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-18 18:28:43,423 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-18 18:28:43,426 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-18 18:28:43,426 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-18 18:28:43,426 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-18 18:28:43,427 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-18 18:28:43,428 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-18 18:28:43,428 INFO L153 SettingsManager]: * Use SBE=true [2023-12-18 18:28:43,428 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-18 18:28:43,428 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-18 18:28:43,428 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-18 18:28:43,428 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-18 18:28:43,428 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-18 18:28:43,429 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-18 18:28:43,429 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-18 18:28:43,429 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-18 18:28:43,429 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-18 18:28:43,429 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-18 18:28:43,429 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-18 18:28:43,430 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-18 18:28:43,430 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-18 18:28:43,430 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-18 18:28:43,430 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-18 18:28:43,431 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-18 18:28:43,431 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-18 18:28:43,431 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-18 18:28:43,432 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-18 18:28:43,432 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-18 18:28:43,432 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-18 18:28:43,432 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-18 18:28:43,432 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-18 18:28:43,432 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-18 18:28:43,432 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-18 18:28:43,432 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-18 18:28:43,433 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-18 18:28:43,433 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-18 18:28:43,433 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> true [2023-12-18 18:28:43,633 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-18 18:28:43,651 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-18 18:28:43,652 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-18 18:28:43,653 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-18 18:28:43,653 INFO L274 PluginConnector]: CDTParser initialized [2023-12-18 18:28:43,654 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-tiling/nr3.c [2023-12-18 18:28:44,724 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-18 18:28:44,855 INFO L384 CDTParser]: Found 1 translation units. [2023-12-18 18:28:44,856 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-tiling/nr3.c [2023-12-18 18:28:44,860 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/815f7f3e0/1dbd796bc18a4944afd2d0498b93c9d1/FLAG793a36a47 [2023-12-18 18:28:44,869 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/815f7f3e0/1dbd796bc18a4944afd2d0498b93c9d1 [2023-12-18 18:28:44,871 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-18 18:28:44,872 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-18 18:28:44,873 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-18 18:28:44,873 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-18 18:28:44,876 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-18 18:28:44,876 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 06:28:44" (1/1) ... [2023-12-18 18:28:44,877 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6514aa68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:28:44, skipping insertion in model container [2023-12-18 18:28:44,877 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 06:28:44" (1/1) ... [2023-12-18 18:28:44,889 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-18 18:28:44,978 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-tiling/nr3.c[394,407] [2023-12-18 18:28:44,991 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-18 18:28:44,996 INFO L202 MainTranslator]: Completed pre-run [2023-12-18 18:28:45,004 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-tiling/nr3.c[394,407] [2023-12-18 18:28:45,010 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-18 18:28:45,019 INFO L206 MainTranslator]: Completed translation [2023-12-18 18:28:45,019 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:28:45 WrapperNode [2023-12-18 18:28:45,019 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-18 18:28:45,020 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-18 18:28:45,020 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-18 18:28:45,020 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-18 18:28:45,024 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:28:45" (1/1) ... [2023-12-18 18:28:45,028 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:28:45" (1/1) ... [2023-12-18 18:28:45,040 INFO L138 Inliner]: procedures = 15, calls = 22, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 80 [2023-12-18 18:28:45,040 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-18 18:28:45,041 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-18 18:28:45,041 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-18 18:28:45,041 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-18 18:28:45,048 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:28:45" (1/1) ... [2023-12-18 18:28:45,048 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:28:45" (1/1) ... [2023-12-18 18:28:45,050 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:28:45" (1/1) ... [2023-12-18 18:28:45,058 INFO L175 MemorySlicer]: Split 12 memory accesses to 3 slices as follows [2, 6, 4]. 50 percent of accesses are in the largest equivalence class. The 8 initializations are split as follows [2, 6, 0]. The 2 writes are split as follows [0, 0, 2]. [2023-12-18 18:28:45,058 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:28:45" (1/1) ... [2023-12-18 18:28:45,058 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:28:45" (1/1) ... [2023-12-18 18:28:45,061 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:28:45" (1/1) ... [2023-12-18 18:28:45,063 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:28:45" (1/1) ... [2023-12-18 18:28:45,064 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:28:45" (1/1) ... [2023-12-18 18:28:45,065 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:28:45" (1/1) ... [2023-12-18 18:28:45,066 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-18 18:28:45,066 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-18 18:28:45,067 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-18 18:28:45,067 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-18 18:28:45,067 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:28:45" (1/1) ... [2023-12-18 18:28:45,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-18 18:28:45,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:28:45,109 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) [2023-12-18 18:28:45,161 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 [2023-12-18 18:28:45,179 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-18 18:28:45,180 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-18 18:28:45,180 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-12-18 18:28:45,180 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-12-18 18:28:45,180 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-18 18:28:45,180 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-12-18 18:28:45,180 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-12-18 18:28:45,180 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-12-18 18:28:45,180 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-18 18:28:45,180 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-18 18:28:45,180 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-12-18 18:28:45,181 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-12-18 18:28:45,181 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-12-18 18:28:45,181 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-18 18:28:45,252 INFO L241 CfgBuilder]: Building ICFG [2023-12-18 18:28:45,254 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-18 18:28:45,419 INFO L282 CfgBuilder]: Performing block encoding [2023-12-18 18:28:45,433 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-18 18:28:45,433 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-12-18 18:28:45,433 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 06:28:45 BoogieIcfgContainer [2023-12-18 18:28:45,434 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-18 18:28:45,435 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-18 18:28:45,435 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-18 18:28:45,440 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-18 18:28:45,441 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.12 06:28:44" (1/3) ... [2023-12-18 18:28:45,442 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b45a8d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 06:28:45, skipping insertion in model container [2023-12-18 18:28:45,442 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:28:45" (2/3) ... [2023-12-18 18:28:45,442 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b45a8d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 06:28:45, skipping insertion in model container [2023-12-18 18:28:45,443 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 06:28:45" (3/3) ... [2023-12-18 18:28:45,444 INFO L112 eAbstractionObserver]: Analyzing ICFG nr3.c [2023-12-18 18:28:45,455 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-18 18:28:45,455 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-18 18:28:45,500 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-18 18:28:45,504 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;@efdbacb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-18 18:28:45,504 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-18 18:28:45,507 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 20 states have (on average 1.65) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 18:28:45,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-12-18 18:28:45,517 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:28:45,518 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:28:45,518 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:28:45,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:28:45,522 INFO L85 PathProgramCache]: Analyzing trace with hash -2106680282, now seen corresponding path program 1 times [2023-12-18 18:28:45,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:28:45,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438964133] [2023-12-18 18:28:45,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:28:45,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:28:45,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:28:45,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:28:45,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:28:45,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438964133] [2023-12-18 18:28:45,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438964133] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-18 18:28:45,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-18 18:28:45,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-18 18:28:45,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930970711] [2023-12-18 18:28:45,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-18 18:28:45,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-18 18:28:45,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:28:45,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-18 18:28:45,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-18 18:28:45,731 INFO L87 Difference]: Start difference. First operand has 22 states, 20 states have (on average 1.65) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 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) [2023-12-18 18:28:45,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:28:45,767 INFO L93 Difference]: Finished difference Result 40 states and 59 transitions. [2023-12-18 18:28:45,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-18 18:28:45,769 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 [2023-12-18 18:28:45,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:28:45,775 INFO L225 Difference]: With dead ends: 40 [2023-12-18 18:28:45,775 INFO L226 Difference]: Without dead ends: 18 [2023-12-18 18:28:45,777 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 [2023-12-18 18:28:45,781 INFO L413 NwaCegarLoop]: 25 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, 25 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 [2023-12-18 18:28:45,782 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 25 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 18:28:45,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2023-12-18 18:28:45,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2023-12-18 18:28:45,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 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) [2023-12-18 18:28:45,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2023-12-18 18:28:45,803 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 12 [2023-12-18 18:28:45,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:28:45,803 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2023-12-18 18:28:45,803 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) [2023-12-18 18:28:45,803 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2023-12-18 18:28:45,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-12-18 18:28:45,804 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:28:45,804 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:28:45,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-18 18:28:45,804 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:28:45,805 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:28:45,805 INFO L85 PathProgramCache]: Analyzing trace with hash -1426621912, now seen corresponding path program 1 times [2023-12-18 18:28:45,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:28:45,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304820964] [2023-12-18 18:28:45,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:28:45,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:28:45,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:28:45,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:28:45,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:28:45,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304820964] [2023-12-18 18:28:45,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304820964] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-18 18:28:45,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-18 18:28:45,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-18 18:28:45,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616032920] [2023-12-18 18:28:45,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-18 18:28:45,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-18 18:28:45,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:28:45,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-18 18:28:45,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-18 18:28:45,933 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 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) [2023-12-18 18:28:45,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:28:45,967 INFO L93 Difference]: Finished difference Result 23 states and 27 transitions. [2023-12-18 18:28:45,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-18 18:28:45,967 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 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 [2023-12-18 18:28:45,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:28:45,967 INFO L225 Difference]: With dead ends: 23 [2023-12-18 18:28:45,968 INFO L226 Difference]: Without dead ends: 21 [2023-12-18 18:28:45,968 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-18 18:28:45,969 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 3 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 18:28:45,970 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 51 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 18:28:45,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-12-18 18:28:45,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2023-12-18 18:28:45,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 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) [2023-12-18 18:28:45,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2023-12-18 18:28:45,977 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 12 [2023-12-18 18:28:45,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:28:45,978 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2023-12-18 18:28:45,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 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) [2023-12-18 18:28:45,978 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2023-12-18 18:28:45,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-12-18 18:28:45,978 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:28:45,978 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:28:45,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-18 18:28:45,979 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:28:45,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:28:45,980 INFO L85 PathProgramCache]: Analyzing trace with hash -1426562330, now seen corresponding path program 1 times [2023-12-18 18:28:45,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:28:45,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944896621] [2023-12-18 18:28:45,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:28:45,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:28:46,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:28:46,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:28:46,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:28:46,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944896621] [2023-12-18 18:28:46,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944896621] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-18 18:28:46,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-18 18:28:46,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-18 18:28:46,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006412877] [2023-12-18 18:28:46,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-18 18:28:46,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-18 18:28:46,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:28:46,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-18 18:28:46,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-12-18 18:28:46,138 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 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) [2023-12-18 18:28:46,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:28:46,161 INFO L93 Difference]: Finished difference Result 35 states and 43 transitions. [2023-12-18 18:28:46,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-18 18:28:46,161 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 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 [2023-12-18 18:28:46,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:28:46,161 INFO L225 Difference]: With dead ends: 35 [2023-12-18 18:28:46,162 INFO L226 Difference]: Without dead ends: 25 [2023-12-18 18:28:46,162 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-12-18 18:28:46,163 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 54 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 18:28:46,163 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 22 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 18:28:46,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-12-18 18:28:46,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 21. [2023-12-18 18:28:46,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.25) internal successors, (25), 20 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) [2023-12-18 18:28:46,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2023-12-18 18:28:46,166 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 12 [2023-12-18 18:28:46,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:28:46,166 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2023-12-18 18:28:46,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 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) [2023-12-18 18:28:46,167 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2023-12-18 18:28:46,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-12-18 18:28:46,167 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:28:46,167 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:28:46,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-18 18:28:46,167 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:28:46,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:28:46,168 INFO L85 PathProgramCache]: Analyzing trace with hash 1008841274, now seen corresponding path program 1 times [2023-12-18 18:28:46,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:28:46,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334779588] [2023-12-18 18:28:46,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:28:46,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:28:46,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:28:46,204 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:28:46,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:28:46,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334779588] [2023-12-18 18:28:46,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334779588] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-18 18:28:46,204 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-18 18:28:46,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-18 18:28:46,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806777653] [2023-12-18 18:28:46,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-18 18:28:46,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-18 18:28:46,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:28:46,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-18 18:28:46,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-18 18:28:46,206 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 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) [2023-12-18 18:28:46,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:28:46,220 INFO L93 Difference]: Finished difference Result 39 states and 49 transitions. [2023-12-18 18:28:46,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-18 18:28:46,220 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 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 [2023-12-18 18:28:46,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:28:46,221 INFO L225 Difference]: With dead ends: 39 [2023-12-18 18:28:46,221 INFO L226 Difference]: Without dead ends: 24 [2023-12-18 18:28:46,221 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-18 18:28:46,222 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 3 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 18:28:46,222 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 29 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 18:28:46,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-12-18 18:28:46,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2023-12-18 18:28:46,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 18:28:46,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2023-12-18 18:28:46,225 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 15 [2023-12-18 18:28:46,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:28:46,225 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2023-12-18 18:28:46,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 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) [2023-12-18 18:28:46,226 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2023-12-18 18:28:46,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-12-18 18:28:46,226 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:28:46,226 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:28:46,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-18 18:28:46,226 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:28:46,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:28:46,227 INFO L85 PathProgramCache]: Analyzing trace with hash -1963751443, now seen corresponding path program 1 times [2023-12-18 18:28:46,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:28:46,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777196170] [2023-12-18 18:28:46,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:28:46,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:28:46,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:28:46,260 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:28:46,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:28:46,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777196170] [2023-12-18 18:28:46,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777196170] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:28:46,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447910681] [2023-12-18 18:28:46,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:28:46,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:28:46,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:28:46,263 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) [2023-12-18 18:28:46,295 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-18 18:28:46,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:28:46,321 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-18 18:28:46,324 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:28:46,348 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:28:46,348 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 18:28:46,369 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:28:46,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447910681] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 18:28:46,369 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 18:28:46,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2023-12-18 18:28:46,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548923535] [2023-12-18 18:28:46,370 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 18:28:46,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-18 18:28:46,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:28:46,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-18 18:28:46,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-12-18 18:28:46,371 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 18:28:46,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:28:46,392 INFO L93 Difference]: Finished difference Result 44 states and 56 transitions. [2023-12-18 18:28:46,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-18 18:28:46,392 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 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 18 [2023-12-18 18:28:46,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:28:46,393 INFO L225 Difference]: With dead ends: 44 [2023-12-18 18:28:46,393 INFO L226 Difference]: Without dead ends: 28 [2023-12-18 18:28:46,393 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-12-18 18:28:46,394 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 7 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 18:28:46,400 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 42 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 18:28:46,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-12-18 18:28:46,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2023-12-18 18:28:46,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 27 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 18:28:46,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2023-12-18 18:28:46,404 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 18 [2023-12-18 18:28:46,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:28:46,404 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2023-12-18 18:28:46,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 18:28:46,405 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2023-12-18 18:28:46,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-12-18 18:28:46,405 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:28:46,405 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:28:46,417 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-18 18:28:46,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:28:46,610 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:28:46,611 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:28:46,611 INFO L85 PathProgramCache]: Analyzing trace with hash -1711246131, now seen corresponding path program 2 times [2023-12-18 18:28:46,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:28:46,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719737059] [2023-12-18 18:28:46,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:28:46,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:28:46,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:28:46,735 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:28:46,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:28:46,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719737059] [2023-12-18 18:28:46,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719737059] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:28:46,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652485309] [2023-12-18 18:28:46,740 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-18 18:28:46,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:28:46,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:28:46,742 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) [2023-12-18 18:28:46,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-18 18:28:46,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-18 18:28:46,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 18:28:46,794 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-18 18:28:46,795 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:28:46,845 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:28:46,846 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-18 18:28:46,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652485309] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-18 18:28:46,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-18 18:28:46,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2023-12-18 18:28:46,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603757979] [2023-12-18 18:28:46,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-18 18:28:46,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-18 18:28:46,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:28:46,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-18 18:28:46,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2023-12-18 18:28:46,847 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 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) [2023-12-18 18:28:46,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:28:46,873 INFO L93 Difference]: Finished difference Result 50 states and 62 transitions. [2023-12-18 18:28:46,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-18 18:28:46,874 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 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 24 [2023-12-18 18:28:46,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:28:46,874 INFO L225 Difference]: With dead ends: 50 [2023-12-18 18:28:46,874 INFO L226 Difference]: Without dead ends: 28 [2023-12-18 18:28:46,874 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2023-12-18 18:28:46,875 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 16 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 18:28:46,875 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 24 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 18:28:46,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-12-18 18:28:46,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2023-12-18 18:28:46,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 27 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 18:28:46,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2023-12-18 18:28:46,879 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 24 [2023-12-18 18:28:46,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:28:46,879 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2023-12-18 18:28:46,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 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) [2023-12-18 18:28:46,879 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2023-12-18 18:28:46,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-12-18 18:28:46,880 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:28:46,880 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:28:46,898 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-18 18:28:47,096 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,SelfDestructingSolverStorable5 [2023-12-18 18:28:47,097 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:28:47,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:28:47,097 INFO L85 PathProgramCache]: Analyzing trace with hash -1010181553, now seen corresponding path program 1 times [2023-12-18 18:28:47,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:28:47,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19630593] [2023-12-18 18:28:47,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:28:47,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:28:47,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:28:47,650 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:28:47,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:28:47,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19630593] [2023-12-18 18:28:47,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19630593] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:28:47,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596651769] [2023-12-18 18:28:47,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:28:47,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:28:47,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:28:47,659 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) [2023-12-18 18:28:47,694 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-18 18:28:47,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:28:47,712 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 38 conjunts are in the unsatisfiable core [2023-12-18 18:28:47,715 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:28:47,863 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 11 treesize of output 7 [2023-12-18 18:28:47,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 18:28:47,928 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2023-12-18 18:28:48,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 18:28:48,033 INFO L349 Elim1Store]: treesize reduction 28, result has 49.1 percent of original size [2023-12-18 18:28:48,034 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 44 [2023-12-18 18:28:48,462 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:28:48,463 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 18:28:52,696 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 57 treesize of output 53 [2023-12-18 18:28:52,700 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 119 treesize of output 115 [2023-12-18 18:28:52,837 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-18 18:28:52,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596651769] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 18:28:52,837 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 18:28:52,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 14] total 37 [2023-12-18 18:28:52,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286963828] [2023-12-18 18:28:52,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 18:28:52,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-12-18 18:28:52,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:28:52,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-12-18 18:28:52,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=1120, Unknown=1, NotChecked=0, Total=1332 [2023-12-18 18:28:52,839 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 37 states, 37 states have (on average 1.7567567567567568) internal successors, (65), 37 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) [2023-12-18 18:29:02,031 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-12-18 18:29:06,042 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-12-18 18:29:10,062 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-12-18 18:29:15,108 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-18 18:29:20,124 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-18 18:29:25,474 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-18 18:29:29,486 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-18 18:29:33,498 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-18 18:29:37,507 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-18 18:29:37,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:29:37,612 INFO L93 Difference]: Finished difference Result 183 states and 217 transitions. [2023-12-18 18:29:37,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2023-12-18 18:29:37,612 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.7567567567567568) internal successors, (65), 37 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 24 [2023-12-18 18:29:37,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:29:37,614 INFO L225 Difference]: With dead ends: 183 [2023-12-18 18:29:37,614 INFO L226 Difference]: Without dead ends: 161 [2023-12-18 18:29:37,618 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2788 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=1917, Invalid=7784, Unknown=1, NotChecked=0, Total=9702 [2023-12-18 18:29:37,619 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 673 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 623 mSolverCounterSat, 67 mSolverCounterUnsat, 9 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 38.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 673 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 623 IncrementalHoareTripleChecker+Invalid, 9 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 38.8s IncrementalHoareTripleChecker+Time [2023-12-18 18:29:37,619 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [673 Valid, 97 Invalid, 699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 623 Invalid, 9 Unknown, 0 Unchecked, 38.8s Time] [2023-12-18 18:29:37,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2023-12-18 18:29:37,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 45. [2023-12-18 18:29:37,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.2272727272727273) internal successors, (54), 44 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 18:29:37,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 54 transitions. [2023-12-18 18:29:37,633 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 54 transitions. Word has length 24 [2023-12-18 18:29:37,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:29:37,634 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 54 transitions. [2023-12-18 18:29:37,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.7567567567567568) internal successors, (65), 37 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) [2023-12-18 18:29:37,635 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 54 transitions. [2023-12-18 18:29:37,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-12-18 18:29:37,635 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:29:37,635 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:29:37,640 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-18 18:29:37,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:29:37,841 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:29:37,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:29:37,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1071963653, now seen corresponding path program 1 times [2023-12-18 18:29:37,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:29:37,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395848269] [2023-12-18 18:29:37,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:29:37,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:29:37,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:29:38,180 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:29:38,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:29:38,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395848269] [2023-12-18 18:29:38,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395848269] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:29:38,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252563685] [2023-12-18 18:29:38,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:29:38,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:29:38,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:29:38,195 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) [2023-12-18 18:29:38,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-18 18:29:38,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:29:38,260 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 38 conjunts are in the unsatisfiable core [2023-12-18 18:29:38,262 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:29:38,338 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 11 treesize of output 7 [2023-12-18 18:29:38,375 INFO L349 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2023-12-18 18:29:38,376 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 1 case distinctions, treesize of input 23 treesize of output 26 [2023-12-18 18:29:38,753 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:29:38,753 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 18:29:39,033 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 41 treesize of output 37 [2023-12-18 18:29:39,036 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 59 treesize of output 51 [2023-12-18 18:29:39,126 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-18 18:29:39,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252563685] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 18:29:39,126 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 18:29:39,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15, 14] total 36 [2023-12-18 18:29:39,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316160198] [2023-12-18 18:29:39,127 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 18:29:39,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-12-18 18:29:39,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:29:39,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-12-18 18:29:39,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1078, Unknown=0, NotChecked=0, Total=1260 [2023-12-18 18:29:39,128 INFO L87 Difference]: Start difference. First operand 45 states and 54 transitions. Second operand has 36 states, 36 states have (on average 2.2777777777777777) internal successors, (82), 36 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) [2023-12-18 18:29:40,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:29:40,461 INFO L93 Difference]: Finished difference Result 161 states and 193 transitions. [2023-12-18 18:29:40,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-12-18 18:29:40,461 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.2777777777777777) internal successors, (82), 36 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) Word has length 29 [2023-12-18 18:29:40,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:29:40,462 INFO L225 Difference]: With dead ends: 161 [2023-12-18 18:29:40,462 INFO L226 Difference]: Without dead ends: 127 [2023-12-18 18:29:40,463 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1712 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=951, Invalid=5055, Unknown=0, NotChecked=0, Total=6006 [2023-12-18 18:29:40,464 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 235 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 564 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-18 18:29:40,464 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [235 Valid, 149 Invalid, 603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 564 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-18 18:29:40,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2023-12-18 18:29:40,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 55. [2023-12-18 18:29:40,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.1851851851851851) internal successors, (64), 54 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 18:29:40,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2023-12-18 18:29:40,474 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 29 [2023-12-18 18:29:40,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:29:40,474 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2023-12-18 18:29:40,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.2777777777777777) internal successors, (82), 36 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) [2023-12-18 18:29:40,475 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2023-12-18 18:29:40,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-12-18 18:29:40,475 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:29:40,475 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:29:40,484 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-18 18:29:40,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:29:40,681 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:29:40,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:29:40,681 INFO L85 PathProgramCache]: Analyzing trace with hash 469747151, now seen corresponding path program 2 times [2023-12-18 18:29:40,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:29:40,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31764206] [2023-12-18 18:29:40,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:29:40,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:29:40,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:29:40,950 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:29:40,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:29:40,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31764206] [2023-12-18 18:29:40,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31764206] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:29:40,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335414105] [2023-12-18 18:29:40,951 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-18 18:29:40,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:29:40,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:29:40,952 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) [2023-12-18 18:29:40,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-18 18:29:41,008 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-18 18:29:41,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 18:29:41,009 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 31 conjunts are in the unsatisfiable core [2023-12-18 18:29:41,010 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:29:41,042 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 13 treesize of output 9 [2023-12-18 18:29:41,121 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 7 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:29:41,121 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 18:29:41,187 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 17 [2023-12-18 18:29:41,195 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 24 treesize of output 20 [2023-12-18 18:29:41,300 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:29:41,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335414105] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 18:29:41,300 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 18:29:41,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 27 [2023-12-18 18:29:41,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134718105] [2023-12-18 18:29:41,301 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 18:29:41,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-12-18 18:29:41,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:29:41,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-12-18 18:29:41,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2023-12-18 18:29:41,302 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 18:29:42,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:29:42,203 INFO L93 Difference]: Finished difference Result 166 states and 193 transitions. [2023-12-18 18:29:42,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2023-12-18 18:29:42,204 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2023-12-18 18:29:42,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:29:42,205 INFO L225 Difference]: With dead ends: 166 [2023-12-18 18:29:42,205 INFO L226 Difference]: Without dead ends: 164 [2023-12-18 18:29:42,206 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1547 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=754, Invalid=4076, Unknown=0, NotChecked=0, Total=4830 [2023-12-18 18:29:42,206 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 178 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 529 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-18 18:29:42,207 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 144 Invalid, 575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 529 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-18 18:29:42,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2023-12-18 18:29:42,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 73. [2023-12-18 18:29:42,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.2083333333333333) internal successors, (87), 72 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 18:29:42,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 87 transitions. [2023-12-18 18:29:42,218 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 87 transitions. Word has length 34 [2023-12-18 18:29:42,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:29:42,219 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 87 transitions. [2023-12-18 18:29:42,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 18:29:42,219 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 87 transitions. [2023-12-18 18:29:42,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-12-18 18:29:42,219 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:29:42,219 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:29:42,224 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-12-18 18:29:42,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:29:42,424 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:29:42,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:29:42,425 INFO L85 PathProgramCache]: Analyzing trace with hash 508323451, now seen corresponding path program 3 times [2023-12-18 18:29:42,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:29:42,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476260337] [2023-12-18 18:29:42,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:29:42,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:29:42,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:29:42,616 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 16 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-18 18:29:42,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:29:42,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476260337] [2023-12-18 18:29:42,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476260337] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:29:42,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050290267] [2023-12-18 18:29:42,617 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-18 18:29:42,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:29:42,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:29:42,638 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) [2023-12-18 18:29:42,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-18 18:29:42,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-12-18 18:29:42,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 18:29:42,703 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 13 conjunts are in the unsatisfiable core [2023-12-18 18:29:42,704 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:29:43,014 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 34 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-18 18:29:43,015 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 18:29:43,188 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 27 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-18 18:29:43,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050290267] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 18:29:43,188 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 18:29:43,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 12] total 31 [2023-12-18 18:29:43,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446073819] [2023-12-18 18:29:43,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 18:29:43,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-12-18 18:29:43,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:29:43,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-12-18 18:29:43,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=692, Unknown=0, NotChecked=0, Total=930 [2023-12-18 18:29:43,190 INFO L87 Difference]: Start difference. First operand 73 states and 87 transitions. Second operand has 31 states, 31 states have (on average 3.064516129032258) internal successors, (95), 31 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) [2023-12-18 18:29:43,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:29:43,479 INFO L93 Difference]: Finished difference Result 121 states and 144 transitions. [2023-12-18 18:29:43,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-12-18 18:29:43,480 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.064516129032258) internal successors, (95), 31 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 39 [2023-12-18 18:29:43,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:29:43,480 INFO L225 Difference]: With dead ends: 121 [2023-12-18 18:29:43,480 INFO L226 Difference]: Without dead ends: 95 [2023-12-18 18:29:43,481 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=466, Invalid=1256, Unknown=0, NotChecked=0, Total=1722 [2023-12-18 18:29:43,482 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 191 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 18:29:43,482 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 114 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 18:29:43,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2023-12-18 18:29:43,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 65. [2023-12-18 18:29:43,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.21875) internal successors, (78), 64 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 18:29:43,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 78 transitions. [2023-12-18 18:29:43,492 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 78 transitions. Word has length 39 [2023-12-18 18:29:43,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:29:43,492 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 78 transitions. [2023-12-18 18:29:43,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.064516129032258) internal successors, (95), 31 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) [2023-12-18 18:29:43,492 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 78 transitions. [2023-12-18 18:29:43,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-12-18 18:29:43,493 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:29:43,493 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:29:43,498 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-12-18 18:29:43,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:29:43,698 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:29:43,698 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:29:43,698 INFO L85 PathProgramCache]: Analyzing trace with hash -827991944, now seen corresponding path program 4 times [2023-12-18 18:29:43,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:29:43,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488714162] [2023-12-18 18:29:43,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:29:43,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:29:43,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:29:44,195 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 4 proven. 70 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-18 18:29:44,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:29:44,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488714162] [2023-12-18 18:29:44,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488714162] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:29:44,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728661377] [2023-12-18 18:29:44,196 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-18 18:29:44,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:29:44,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:29:44,197 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) [2023-12-18 18:29:44,199 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-18 18:29:44,245 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-18 18:29:44,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 18:29:44,247 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 47 conjunts are in the unsatisfiable core [2023-12-18 18:29:44,249 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:29:44,280 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 13 treesize of output 9 [2023-12-18 18:29:44,320 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2023-12-18 18:29:44,321 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 1 case distinctions, treesize of input 28 treesize of output 27 [2023-12-18 18:29:44,406 INFO L349 Elim1Store]: treesize reduction 61, result has 28.2 percent of original size [2023-12-18 18:29:44,406 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 44 [2023-12-18 18:29:44,539 INFO L349 Elim1Store]: treesize reduction 137, result has 21.7 percent of original size [2023-12-18 18:29:44,539 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 47 [2023-12-18 18:29:45,018 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 7 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:29:45,019 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 18:29:49,131 WARN L854 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~j~0#1_50| Int)) (or (< |c_ULTIMATE.start_main_~j~0#1| (+ |v_ULTIMATE.start_main_~j~0#1_50| 1)) (= (select (store (select |c_#memory_int#2| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* 12 |c_ULTIMATE.start_main_~i~0#1|) (* |v_ULTIMATE.start_main_~j~0#1_50| (- 4))) |v_ULTIMATE.start_main_~j~0#1_50|) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 8)) 0))) is different from false [2023-12-18 18:30:23,700 WARN L854 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~j~0#1_50| Int) (|v_ULTIMATE.start_main_~j~0#1_51| Int)) (or (< |v_ULTIMATE.start_main_~j~0#1_51| (+ |v_ULTIMATE.start_main_~j~0#1_50| 1)) (< |c_ULTIMATE.start_main_~j~0#1| (+ |v_ULTIMATE.start_main_~j~0#1_51| 1)) (= (select (let ((.cse0 (* 12 |c_ULTIMATE.start_main_~i~0#1|))) (store (store (store (select |c_#memory_int#2| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* |c_ULTIMATE.start_main_~j~0#1| (- 4)) .cse0) |c_ULTIMATE.start_main_~j~0#1|) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| .cse0 (* |v_ULTIMATE.start_main_~j~0#1_51| (- 4))) |v_ULTIMATE.start_main_~j~0#1_51|) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| .cse0 (* |v_ULTIMATE.start_main_~j~0#1_50| (- 4))) |v_ULTIMATE.start_main_~j~0#1_50|)) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 8)) 0))) is different from false [2023-12-18 18:30:27,793 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 17 [2023-12-18 18:30:27,795 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 24 treesize of output 20 [2023-12-18 18:30:27,872 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 57 refuted. 1 times theorem prover too weak. 0 trivial. 17 not checked. [2023-12-18 18:30:27,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728661377] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 18:30:27,873 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 18:30:27,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 21, 21] total 43 [2023-12-18 18:30:27,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712028811] [2023-12-18 18:30:27,873 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 18:30:27,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-12-18 18:30:27,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:30:27,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-12-18 18:30:27,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=1411, Unknown=9, NotChecked=158, Total=1806 [2023-12-18 18:30:27,875 INFO L87 Difference]: Start difference. First operand 65 states and 78 transitions. Second operand has 43 states, 43 states have (on average 2.488372093023256) internal successors, (107), 43 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 18:30:33,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:30:33,364 INFO L93 Difference]: Finished difference Result 227 states and 273 transitions. [2023-12-18 18:30:33,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2023-12-18 18:30:33,364 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.488372093023256) internal successors, (107), 43 states have internal predecessors, (107), 0 states have call successors, (0), 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 46 [2023-12-18 18:30:33,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:30:33,365 INFO L225 Difference]: With dead ends: 227 [2023-12-18 18:30:33,365 INFO L226 Difference]: Without dead ends: 175 [2023-12-18 18:30:33,367 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 69 SyntacticMatches, 5 SemanticMatches, 78 ConstructedPredicates, 2 IntricatePredicates, 1 DeprecatedPredicates, 2035 ImplicationChecksByTransitivity, 48.0s TimeCoverageRelationStatistics Valid=708, Invalid=5296, Unknown=10, NotChecked=306, Total=6320 [2023-12-18 18:30:33,367 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 199 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 952 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 1314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 952 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 273 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-18 18:30:33,367 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [199 Valid, 155 Invalid, 1314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 952 Invalid, 0 Unknown, 273 Unchecked, 0.6s Time] [2023-12-18 18:30:33,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2023-12-18 18:30:33,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 52. [2023-12-18 18:30:33,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.1764705882352942) internal successors, (60), 51 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 18:30:33,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 60 transitions. [2023-12-18 18:30:33,384 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 60 transitions. Word has length 46 [2023-12-18 18:30:33,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:30:33,385 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 60 transitions. [2023-12-18 18:30:33,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.488372093023256) internal successors, (107), 43 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 18:30:33,385 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 60 transitions. [2023-12-18 18:30:33,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-12-18 18:30:33,387 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:30:33,387 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:30:33,392 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-12-18 18:30:33,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:30:33,591 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:30:33,592 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:30:33,592 INFO L85 PathProgramCache]: Analyzing trace with hash -83585678, now seen corresponding path program 5 times [2023-12-18 18:30:33,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:30:33,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300106501] [2023-12-18 18:30:33,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:30:33,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:30:33,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:30:34,165 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-18 18:30:34,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:30:34,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300106501] [2023-12-18 18:30:34,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300106501] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:30:34,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999636031] [2023-12-18 18:30:34,165 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-18 18:30:34,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:30:34,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:30:34,166 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) [2023-12-18 18:30:34,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-18 18:30:34,254 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2023-12-18 18:30:34,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 18:30:34,256 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 28 conjunts are in the unsatisfiable core [2023-12-18 18:30:34,258 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:30:34,373 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 11 treesize of output 7 [2023-12-18 18:30:34,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 18:30:34,430 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2023-12-18 18:30:34,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 18:30:34,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 18:30:34,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 18:30:34,533 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:30:34,533 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 25 [2023-12-18 18:30:34,855 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 8 proven. 69 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-18 18:30:34,856 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 18:31:11,323 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 41 treesize of output 39 [2023-12-18 18:31:11,326 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 734 treesize of output 718 [2023-12-18 18:31:12,172 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 7 proven. 70 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-18 18:31:12,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999636031] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 18:31:12,173 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 18:31:12,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16, 16] total 45 [2023-12-18 18:31:12,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848452691] [2023-12-18 18:31:12,173 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 18:31:12,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-12-18 18:31:12,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:31:12,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-12-18 18:31:12,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=1739, Unknown=9, NotChecked=0, Total=1980 [2023-12-18 18:31:12,174 INFO L87 Difference]: Start difference. First operand 52 states and 60 transitions. Second operand has 45 states, 45 states have (on average 2.911111111111111) internal successors, (131), 45 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) [2023-12-18 18:31:17,492 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-18 18:31:21,507 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-18 18:31:26,168 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-18 18:31:30,179 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-18 18:31:35,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:31:35,845 INFO L93 Difference]: Finished difference Result 292 states and 346 transitions. [2023-12-18 18:31:35,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2023-12-18 18:31:35,845 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.911111111111111) internal successors, (131), 45 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 51 [2023-12-18 18:31:35,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:31:35,846 INFO L225 Difference]: With dead ends: 292 [2023-12-18 18:31:35,846 INFO L226 Difference]: Without dead ends: 258 [2023-12-18 18:31:35,851 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4894 ImplicationChecksByTransitivity, 44.2s TimeCoverageRelationStatistics Valid=1971, Invalid=13026, Unknown=9, NotChecked=0, Total=15006 [2023-12-18 18:31:35,852 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 843 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 1114 mSolverCounterSat, 188 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 843 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 1306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 1114 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.9s IncrementalHoareTripleChecker+Time [2023-12-18 18:31:35,852 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [843 Valid, 238 Invalid, 1306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [188 Valid, 1114 Invalid, 4 Unknown, 0 Unchecked, 16.9s Time] [2023-12-18 18:31:35,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2023-12-18 18:31:35,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 114. [2023-12-18 18:31:35,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 1.2212389380530972) internal successors, (138), 113 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) [2023-12-18 18:31:35,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 138 transitions. [2023-12-18 18:31:35,891 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 138 transitions. Word has length 51 [2023-12-18 18:31:35,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:31:35,891 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 138 transitions. [2023-12-18 18:31:35,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.911111111111111) internal successors, (131), 45 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) [2023-12-18 18:31:35,892 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 138 transitions. [2023-12-18 18:31:35,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-12-18 18:31:35,892 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:31:35,893 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:31:35,897 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-12-18 18:31:36,093 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,SelfDestructingSolverStorable11 [2023-12-18 18:31:36,094 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:31:36,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:31:36,094 INFO L85 PathProgramCache]: Analyzing trace with hash 1394009272, now seen corresponding path program 6 times [2023-12-18 18:31:36,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:31:36,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905809832] [2023-12-18 18:31:36,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:31:36,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:31:36,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:31:36,479 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 8 proven. 88 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-18 18:31:36,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:31:36,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905809832] [2023-12-18 18:31:36,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905809832] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:31:36,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137289209] [2023-12-18 18:31:36,480 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-18 18:31:36,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:31:36,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:31:36,481 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) [2023-12-18 18:31:36,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-18 18:31:36,562 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2023-12-18 18:31:36,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 18:31:36,563 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 41 conjunts are in the unsatisfiable core [2023-12-18 18:31:36,565 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:31:36,686 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 11 treesize of output 7 [2023-12-18 18:31:36,717 INFO L349 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2023-12-18 18:31:36,717 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 1 case distinctions, treesize of input 23 treesize of output 26 [2023-12-18 18:31:37,083 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-18 18:31:37,083 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 18:31:37,377 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 41 treesize of output 37 [2023-12-18 18:31:37,379 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 59 treesize of output 51 [2023-12-18 18:31:37,532 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-12-18 18:31:37,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137289209] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 18:31:37,532 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 18:31:37,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 16] total 43 [2023-12-18 18:31:37,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132253156] [2023-12-18 18:31:37,532 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 18:31:37,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-12-18 18:31:37,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:31:37,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-12-18 18:31:37,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1618, Unknown=0, NotChecked=0, Total=1806 [2023-12-18 18:31:37,534 INFO L87 Difference]: Start difference. First operand 114 states and 138 transitions. Second operand has 43 states, 43 states have (on average 3.441860465116279) internal successors, (148), 43 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 18:31:41,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:31:41,443 INFO L93 Difference]: Finished difference Result 492 states and 582 transitions. [2023-12-18 18:31:41,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2023-12-18 18:31:41,443 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 3.441860465116279) internal successors, (148), 43 states have internal predecessors, (148), 0 states have call successors, (0), 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 56 [2023-12-18 18:31:41,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:31:41,444 INFO L225 Difference]: With dead ends: 492 [2023-12-18 18:31:41,444 INFO L226 Difference]: Without dead ends: 401 [2023-12-18 18:31:41,448 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6870 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=2481, Invalid=19275, Unknown=0, NotChecked=0, Total=21756 [2023-12-18 18:31:41,448 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 533 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 1575 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 533 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 1681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 1575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-18 18:31:41,449 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [533 Valid, 428 Invalid, 1681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 1575 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-12-18 18:31:41,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2023-12-18 18:31:41,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 201. [2023-12-18 18:31:41,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 1.22) internal successors, (244), 200 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 18:31:41,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 244 transitions. [2023-12-18 18:31:41,502 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 244 transitions. Word has length 56 [2023-12-18 18:31:41,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:31:41,502 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 244 transitions. [2023-12-18 18:31:41,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 3.441860465116279) internal successors, (148), 43 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 18:31:41,503 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 244 transitions. [2023-12-18 18:31:41,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-12-18 18:31:41,503 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:31:41,503 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:31:41,508 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-12-18 18:31:41,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-12-18 18:31:41,708 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:31:41,709 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:31:41,709 INFO L85 PathProgramCache]: Analyzing trace with hash 2089890098, now seen corresponding path program 7 times [2023-12-18 18:31:41,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:31:41,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828992877] [2023-12-18 18:31:41,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:31:41,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:31:41,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:31:42,036 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 1 proven. 119 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-18 18:31:42,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:31:42,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828992877] [2023-12-18 18:31:42,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828992877] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:31:42,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127316784] [2023-12-18 18:31:42,037 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-18 18:31:42,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:31:42,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:31:42,038 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) [2023-12-18 18:31:42,054 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-18 18:31:42,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:31:42,111 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 41 conjunts are in the unsatisfiable core [2023-12-18 18:31:42,115 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:31:42,206 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 13 treesize of output 9 [2023-12-18 18:31:42,372 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 7 proven. 113 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-18 18:31:42,373 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 18:31:42,496 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 17 [2023-12-18 18:31:42,497 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 24 treesize of output 20 [2023-12-18 18:31:42,618 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 3 proven. 117 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-18 18:31:42,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127316784] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 18:31:42,619 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 18:31:42,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 19] total 36 [2023-12-18 18:31:42,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459418131] [2023-12-18 18:31:42,619 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 18:31:42,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-12-18 18:31:42,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:31:42,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-12-18 18:31:42,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1120, Unknown=0, NotChecked=0, Total=1260 [2023-12-18 18:31:42,620 INFO L87 Difference]: Start difference. First operand 201 states and 244 transitions. Second operand has 36 states, 36 states have (on average 3.0277777777777777) internal successors, (109), 36 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 18:31:44,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:31:44,686 INFO L93 Difference]: Finished difference Result 425 states and 494 transitions. [2023-12-18 18:31:44,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2023-12-18 18:31:44,686 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 3.0277777777777777) internal successors, (109), 36 states have internal predecessors, (109), 0 states have call successors, (0), 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 [2023-12-18 18:31:44,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:31:44,687 INFO L225 Difference]: With dead ends: 425 [2023-12-18 18:31:44,687 INFO L226 Difference]: Without dead ends: 423 [2023-12-18 18:31:44,689 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4426 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1469, Invalid=11641, Unknown=0, NotChecked=0, Total=13110 [2023-12-18 18:31:44,689 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 245 mSDsluCounter, 430 mSDsCounter, 0 mSdLazyCounter, 1645 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 459 SdHoareTripleChecker+Invalid, 1727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 1645 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-18 18:31:44,689 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [245 Valid, 459 Invalid, 1727 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 1645 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-18 18:31:44,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2023-12-18 18:31:44,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 202. [2023-12-18 18:31:44,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 1.228855721393035) internal successors, (247), 201 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 18:31:44,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 247 transitions. [2023-12-18 18:31:44,743 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 247 transitions. Word has length 61 [2023-12-18 18:31:44,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:31:44,743 INFO L495 AbstractCegarLoop]: Abstraction has 202 states and 247 transitions. [2023-12-18 18:31:44,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 3.0277777777777777) internal successors, (109), 36 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 18:31:44,743 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 247 transitions. [2023-12-18 18:31:44,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-12-18 18:31:44,744 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:31:44,744 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:31:44,749 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-12-18 18:31:44,949 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,SelfDestructingSolverStorable13 [2023-12-18 18:31:44,950 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:31:44,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:31:44,950 INFO L85 PathProgramCache]: Analyzing trace with hash -1344954120, now seen corresponding path program 8 times [2023-12-18 18:31:44,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:31:44,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157069539] [2023-12-18 18:31:44,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:31:44,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:31:44,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:31:45,248 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 73 proven. 64 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-12-18 18:31:45,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:31:45,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157069539] [2023-12-18 18:31:45,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157069539] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:31:45,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808767051] [2023-12-18 18:31:45,248 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-18 18:31:45,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:31:45,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:31:45,249 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) [2023-12-18 18:31:45,268 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-18 18:31:45,313 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-18 18:31:45,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 18:31:45,314 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-18 18:31:45,315 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:31:45,782 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 99 proven. 38 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-12-18 18:31:45,782 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 18:31:46,043 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 99 proven. 38 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-12-18 18:31:46,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808767051] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 18:31:46,043 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 18:31:46,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 14] total 39 [2023-12-18 18:31:46,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277208494] [2023-12-18 18:31:46,043 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 18:31:46,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-12-18 18:31:46,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:31:46,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-12-18 18:31:46,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=367, Invalid=1115, Unknown=0, NotChecked=0, Total=1482 [2023-12-18 18:31:46,045 INFO L87 Difference]: Start difference. First operand 202 states and 247 transitions. Second operand has 39 states, 39 states have (on average 4.0256410256410255) internal successors, (157), 39 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 18:31:46,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:31:46,325 INFO L93 Difference]: Finished difference Result 273 states and 329 transitions. [2023-12-18 18:31:46,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-12-18 18:31:46,326 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 4.0256410256410255) internal successors, (157), 39 states have internal predecessors, (157), 0 states have call successors, (0), 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 66 [2023-12-18 18:31:46,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:31:46,327 INFO L225 Difference]: With dead ends: 273 [2023-12-18 18:31:46,327 INFO L226 Difference]: Without dead ends: 232 [2023-12-18 18:31:46,327 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 107 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 708 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=524, Invalid=1546, Unknown=0, NotChecked=0, Total=2070 [2023-12-18 18:31:46,327 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 146 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 18:31:46,328 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 179 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 18:31:46,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2023-12-18 18:31:46,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 202. [2023-12-18 18:31:46,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 1.2238805970149254) internal successors, (246), 201 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 18:31:46,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 246 transitions. [2023-12-18 18:31:46,374 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 246 transitions. Word has length 66 [2023-12-18 18:31:46,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:31:46,375 INFO L495 AbstractCegarLoop]: Abstraction has 202 states and 246 transitions. [2023-12-18 18:31:46,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 4.0256410256410255) internal successors, (157), 39 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 18:31:46,375 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 246 transitions. [2023-12-18 18:31:46,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-12-18 18:31:46,375 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:31:46,375 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:31:46,380 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-12-18 18:31:46,580 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,SelfDestructingSolverStorable14 [2023-12-18 18:31:46,580 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:31:46,581 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:31:46,581 INFO L85 PathProgramCache]: Analyzing trace with hash -22168343, now seen corresponding path program 9 times [2023-12-18 18:31:46,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:31:46,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66049077] [2023-12-18 18:31:46,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:31:46,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:31:46,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:31:47,178 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 3 proven. 201 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-12-18 18:31:47,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:31:47,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66049077] [2023-12-18 18:31:47,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66049077] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:31:47,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110373793] [2023-12-18 18:31:47,178 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-18 18:31:47,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:31:47,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:31:47,183 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) [2023-12-18 18:31:47,184 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-18 18:31:47,358 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2023-12-18 18:31:47,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 18:31:47,359 INFO L262 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 74 conjunts are in the unsatisfiable core [2023-12-18 18:31:47,363 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:31:47,546 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 [2023-12-18 18:31:47,607 INFO L349 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2023-12-18 18:31:47,607 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 1 case distinctions, treesize of input 25 treesize of output 32 [2023-12-18 18:31:47,785 INFO L349 Elim1Store]: treesize reduction 34, result has 57.0 percent of original size [2023-12-18 18:31:47,785 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 64 treesize of output 86 [2023-12-18 18:31:48,415 INFO L349 Elim1Store]: treesize reduction 106, result has 71.1 percent of original size [2023-12-18 18:31:48,415 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 156 treesize of output 347 [2023-12-18 18:33:40,578 WARN L293 SmtUtils]: Spent 8.00s on a formula simplification. DAG size of input: 2788 DAG size of output: 2903 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-12-18 18:35:54,760 WARN L293 SmtUtils]: Spent 5.35s on a formula simplification. DAG size of input: 2489 DAG size of output: 2497 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-12-18 18:37:25,391 WARN L293 SmtUtils]: Spent 37.31s on a formula simplification. DAG size of input: 5721 DAG size of output: 5864 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-12-18 18:37:45,520 WARN L293 SmtUtils]: Spent 9.96s on a formula simplification that was a NOOP. DAG size: 5714 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-12-18 18:39:01,823 INFO L349 Elim1Store]: treesize reduction 96, result has 66.9 percent of original size [2023-12-18 18:39:01,823 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 180 treesize of output 324 [2023-12-18 18:42:49,691 WARN L293 SmtUtils]: Spent 1.26m on a formula simplification. DAG size of input: 4664 DAG size of output: 4291 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) Received shutdown request... [2023-12-18 18:43:01,014 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-18 18:43:01,014 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 [2023-12-18 18:43:01,053 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-18 18:43:01,066 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-12-18 18:43:01,259 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,SelfDestructingSolverStorable15 [2023-12-18 18:43:01,259 WARN L619 AbstractCegarLoop]: Verification canceled: while NwaCegarLoop was analyzing trace of length 74 with TraceHistMax 9,while TraceCheckSpWp was constructing forward predicates,while PolyPacSimplificationTermWalker was simplifying a ATOM-1 term,while PolyPacSimplificationTermWalker was simplifying 12 xjuncts wrt. a ∧-280-6-72-5-8-2-2-1 context. [2023-12-18 18:43:01,262 INFO L445 BasicCegarLoop]: Path program histogram: [9, 2, 1, 1, 1, 1, 1] [2023-12-18 18:43:01,266 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-12-18 18:43:01,268 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.12 06:43:01 BoogieIcfgContainer [2023-12-18 18:43:01,268 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-18 18:43:01,269 INFO L158 Benchmark]: Toolchain (without parser) took 856396.13ms. Allocated memory was 287.3MB in the beginning and 918.6MB in the end (delta: 631.2MB). Free memory was 236.6MB in the beginning and 835.6MB in the end (delta: -599.0MB). Peak memory consumption was 564.2MB. Max. memory is 8.0GB. [2023-12-18 18:43:01,269 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 190.8MB. Free memory is still 143.5MB. There was no memory consumed. Max. memory is 8.0GB. [2023-12-18 18:43:01,269 INFO L158 Benchmark]: CACSL2BoogieTranslator took 146.80ms. Allocated memory is still 287.3MB. Free memory was 236.2MB in the beginning and 225.1MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2023-12-18 18:43:01,269 INFO L158 Benchmark]: Boogie Procedure Inliner took 20.55ms. Allocated memory is still 287.3MB. Free memory was 225.1MB in the beginning and 223.6MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-18 18:43:01,270 INFO L158 Benchmark]: Boogie Preprocessor took 24.92ms. Allocated memory is still 287.3MB. Free memory was 223.6MB in the beginning and 221.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-18 18:43:01,270 INFO L158 Benchmark]: RCFGBuilder took 367.26ms. Allocated memory is still 287.3MB. Free memory was 221.5MB in the beginning and 208.3MB in the end (delta: 13.2MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2023-12-18 18:43:01,270 INFO L158 Benchmark]: TraceAbstraction took 855832.50ms. Allocated memory was 287.3MB in the beginning and 918.6MB in the end (delta: 631.2MB). Free memory was 207.4MB in the beginning and 835.6MB in the end (delta: -628.1MB). Peak memory consumption was 534.8MB. Max. memory is 8.0GB. [2023-12-18 18:43:01,271 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 190.8MB. Free memory is still 143.5MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 146.80ms. Allocated memory is still 287.3MB. Free memory was 236.2MB in the beginning and 225.1MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 20.55ms. Allocated memory is still 287.3MB. Free memory was 225.1MB in the beginning and 223.6MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 24.92ms. Allocated memory is still 287.3MB. Free memory was 223.6MB in the beginning and 221.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 367.26ms. Allocated memory is still 287.3MB. Free memory was 221.5MB in the beginning and 208.3MB in the end (delta: 13.2MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * TraceAbstraction took 855832.50ms. Allocated memory was 287.3MB in the beginning and 918.6MB in the end (delta: 631.2MB). Free memory was 207.4MB in the beginning and 835.6MB in the end (delta: -628.1MB). Peak memory consumption was 534.8MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 8]: Timeout (TraceAbstraction) Unable to prove that a call to reach_error is unreachable (line 8). Cancelled while NwaCegarLoop was analyzing trace of length 74 with TraceHistMax 9,while TraceCheckSpWp was constructing forward predicates,while PolyPacSimplificationTermWalker was simplifying a ATOM-1 term,while PolyPacSimplificationTermWalker was simplifying 12 xjuncts wrt. a ∧-280-6-72-5-8-2-2-1 context. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 22 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 855.8s, OverallIterations: 16, TraceHistogramMax: 9, PathProgramHistogramMax: 9, EmptinessCheckTime: 0.0s, AutomataDifference: 83.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 13 mSolverCounterUnknown, 3326 SdHoareTripleChecker+Valid, 58.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 3326 mSDsluCounter, 2156 SdHoareTripleChecker+Invalid, 58.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 273 IncrementalHoareTripleChecker+Unchecked, 1906 mSDsCounter, 664 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 7502 IncrementalHoareTripleChecker+Invalid, 8452 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 664 mSolverCounterUnsat, 250 mSDtfsCounter, 7502 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1493 GetRequests, 680 SyntacticMatches, 11 SemanticMatches, 802 ConstructedPredicates, 2 IntricatePredicates, 1 DeprecatedPredicates, 25562 ImplicationChecksByTransitivity, 111.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=202occurred in iteration=14, InterpolantAutomatonStates: 575, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 15 MinimizatonAttempts, 1034 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 94.3s InterpolantComputationTime, 947 NumberOfCodeBlocks, 944 NumberOfCodeBlocksAsserted, 47 NumberOfCheckSat, 1335 ConstructedInterpolants, 107 QuantifiedInterpolants, 16758 SizeOfPredicates, 128 NumberOfNonLiveVariables, 1615 ConjunctsInSsa, 299 ConjunctsInUnsatCore, 36 InterpolantComputations, 5 PerfectInterpolantSequences, 642/2016 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown