/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/reducercommutativity/max05-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-18 18:02:16,847 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-18 18:02:16,917 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 18:02:16,920 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-18 18:02:16,921 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-18 18:02:16,943 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-18 18:02:16,944 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-18 18:02:16,945 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-18 18:02:16,945 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-18 18:02:16,948 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-18 18:02:16,948 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-18 18:02:16,949 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-18 18:02:16,949 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-18 18:02:16,950 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-18 18:02:16,950 INFO L153 SettingsManager]: * Use SBE=true [2023-12-18 18:02:16,950 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-18 18:02:16,950 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-18 18:02:16,950 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-18 18:02:16,951 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-18 18:02:16,951 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-18 18:02:16,952 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-18 18:02:16,952 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-18 18:02:16,952 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-18 18:02:16,952 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-18 18:02:16,952 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-18 18:02:16,952 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-18 18:02:16,953 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-18 18:02:16,953 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-18 18:02:16,953 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-18 18:02:16,953 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-18 18:02:16,954 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-18 18:02:16,954 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-18 18:02:16,954 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-18 18:02:16,954 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-18 18:02:16,954 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-18 18:02:16,955 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-18 18:02:16,955 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-18 18:02:16,955 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-18 18:02:16,955 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-18 18:02:16,955 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-18 18:02:16,955 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-18 18:02:16,955 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-18 18:02:16,955 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-18 18:02:16,955 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> true [2023-12-18 18:02:17,122 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-18 18:02:17,140 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-18 18:02:17,141 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-18 18:02:17,144 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-18 18:02:17,144 INFO L274 PluginConnector]: CDTParser initialized [2023-12-18 18:02:17,145 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/max05-1.i [2023-12-18 18:02:18,194 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-18 18:02:18,329 INFO L384 CDTParser]: Found 1 translation units. [2023-12-18 18:02:18,329 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/max05-1.i [2023-12-18 18:02:18,334 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/52e87d17f/2701da706f8c4e63b323fb134edfff92/FLAGdc79a2d56 [2023-12-18 18:02:18,345 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/52e87d17f/2701da706f8c4e63b323fb134edfff92 [2023-12-18 18:02:18,346 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-18 18:02:18,347 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-18 18:02:18,348 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-18 18:02:18,348 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-18 18:02:18,352 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-18 18:02:18,352 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 06:02:18" (1/1) ... [2023-12-18 18:02:18,353 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f6008eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:02:18, skipping insertion in model container [2023-12-18 18:02:18,353 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 06:02:18" (1/1) ... [2023-12-18 18:02:18,367 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-18 18:02:18,470 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/max05-1.i[1284,1297] [2023-12-18 18:02:18,473 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-18 18:02:18,479 INFO L202 MainTranslator]: Completed pre-run [2023-12-18 18:02:18,494 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/max05-1.i[1284,1297] [2023-12-18 18:02:18,495 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-18 18:02:18,505 INFO L206 MainTranslator]: Completed translation [2023-12-18 18:02:18,506 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:02:18 WrapperNode [2023-12-18 18:02:18,506 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-18 18:02:18,506 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-18 18:02:18,507 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-18 18:02:18,507 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-18 18:02:18,511 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:02:18" (1/1) ... [2023-12-18 18:02:18,516 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:02:18" (1/1) ... [2023-12-18 18:02:18,528 INFO L138 Inliner]: procedures = 16, calls = 23, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 69 [2023-12-18 18:02:18,528 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-18 18:02:18,529 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-18 18:02:18,529 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-18 18:02:18,529 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-18 18:02:18,536 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:02:18" (1/1) ... [2023-12-18 18:02:18,537 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:02:18" (1/1) ... [2023-12-18 18:02:18,538 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:02:18" (1/1) ... [2023-12-18 18:02:18,547 INFO L175 MemorySlicer]: Split 13 memory accesses to 2 slices as follows [2, 11]. 85 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 5 writes are split as follows [0, 5]. [2023-12-18 18:02:18,547 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:02:18" (1/1) ... [2023-12-18 18:02:18,547 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:02:18" (1/1) ... [2023-12-18 18:02:18,551 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:02:18" (1/1) ... [2023-12-18 18:02:18,554 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:02:18" (1/1) ... [2023-12-18 18:02:18,555 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:02:18" (1/1) ... [2023-12-18 18:02:18,555 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:02:18" (1/1) ... [2023-12-18 18:02:18,557 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-18 18:02:18,557 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-18 18:02:18,557 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-18 18:02:18,557 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-18 18:02:18,558 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:02:18" (1/1) ... [2023-12-18 18:02:18,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-18 18:02:18,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:02:18,594 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 18:02:18,618 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-18 18:02:18,618 INFO L130 BoogieDeclarations]: Found specification of procedure max [2023-12-18 18:02:18,618 INFO L138 BoogieDeclarations]: Found implementation of procedure max [2023-12-18 18:02:18,619 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-18 18:02:18,619 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-12-18 18:02:18,619 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-18 18:02:18,619 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-12-18 18:02:18,620 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-12-18 18:02:18,620 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-18 18:02:18,621 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-18 18:02:18,621 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-12-18 18:02:18,621 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-12-18 18:02:18,621 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-18 18:02:18,615 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 18:02:18,670 INFO L241 CfgBuilder]: Building ICFG [2023-12-18 18:02:18,672 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-18 18:02:18,778 INFO L282 CfgBuilder]: Performing block encoding [2023-12-18 18:02:18,825 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-18 18:02:18,825 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-12-18 18:02:18,826 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 06:02:18 BoogieIcfgContainer [2023-12-18 18:02:18,826 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-18 18:02:18,827 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-18 18:02:18,827 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-18 18:02:18,830 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-18 18:02:18,830 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.12 06:02:18" (1/3) ... [2023-12-18 18:02:18,830 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67fcb01a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 06:02:18, skipping insertion in model container [2023-12-18 18:02:18,830 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:02:18" (2/3) ... [2023-12-18 18:02:18,831 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67fcb01a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 06:02:18, skipping insertion in model container [2023-12-18 18:02:18,831 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 06:02:18" (3/3) ... [2023-12-18 18:02:18,832 INFO L112 eAbstractionObserver]: Analyzing ICFG max05-1.i [2023-12-18 18:02:18,846 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-18 18:02:18,846 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-18 18:02:18,888 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-18 18:02:18,895 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;@68bd1850, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-18 18:02:18,895 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-18 18:02:18,898 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 16 states have (on average 1.5625) internal successors, (25), 17 states have internal predecessors, (25), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-18 18:02:18,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-12-18 18:02:18,908 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:02:18,909 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:02:18,909 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:02:18,913 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:02:18,913 INFO L85 PathProgramCache]: Analyzing trace with hash 548279552, now seen corresponding path program 1 times [2023-12-18 18:02:18,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:02:18,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349134703] [2023-12-18 18:02:18,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:02:18,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:02:19,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:02:19,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-18 18:02:19,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:02:19,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-18 18:02:19,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:02:19,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-12-18 18:02:19,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:02:19,098 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-18 18:02:19,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:02:19,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349134703] [2023-12-18 18:02:19,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349134703] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-18 18:02:19,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-18 18:02:19,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-18 18:02:19,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980678306] [2023-12-18 18:02:19,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-18 18:02:19,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-18 18:02:19,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:02:19,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-18 18:02:19,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-18 18:02:19,137 INFO L87 Difference]: Start difference. First operand has 22 states, 16 states have (on average 1.5625) internal successors, (25), 17 states have internal predecessors, (25), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-18 18:02:19,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:02:19,183 INFO L93 Difference]: Finished difference Result 42 states and 61 transitions. [2023-12-18 18:02:19,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-18 18:02:19,185 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 25 [2023-12-18 18:02:19,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:02:19,190 INFO L225 Difference]: With dead ends: 42 [2023-12-18 18:02:19,190 INFO L226 Difference]: Without dead ends: 20 [2023-12-18 18:02:19,192 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 11 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 18:02:19,195 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 18:02:19,196 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 21 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 18:02:19,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-12-18 18:02:19,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2023-12-18 18:02:19,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-18 18:02:19,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 25 transitions. [2023-12-18 18:02:19,222 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 25 transitions. Word has length 25 [2023-12-18 18:02:19,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:02:19,222 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 25 transitions. [2023-12-18 18:02:19,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-18 18:02:19,223 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 25 transitions. [2023-12-18 18:02:19,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-12-18 18:02:19,224 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:02:19,225 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:02:19,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-18 18:02:19,226 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:02:19,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:02:19,228 INFO L85 PathProgramCache]: Analyzing trace with hash -419783731, now seen corresponding path program 1 times [2023-12-18 18:02:19,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:02:19,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638326772] [2023-12-18 18:02:19,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:02:19,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:02:19,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:02:19,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-18 18:02:19,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:02:19,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-18 18:02:19,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:02:19,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-12-18 18:02:19,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:02:19,374 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-18 18:02:19,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:02:19,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638326772] [2023-12-18 18:02:19,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638326772] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:02:19,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828363938] [2023-12-18 18:02:19,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:02:19,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:02:19,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:02:19,381 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 18:02:19,386 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 18:02:19,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:02:19,453 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-18 18:02:19,456 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:02:19,474 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-18 18:02:19,474 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-18 18:02:19,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828363938] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-18 18:02:19,477 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-18 18:02:19,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-12-18 18:02:19,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332522122] [2023-12-18 18:02:19,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-18 18:02:19,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-18 18:02:19,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:02:19,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-18 18:02:19,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-18 18:02:19,480 INFO L87 Difference]: Start difference. First operand 20 states and 25 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-18 18:02:19,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:02:19,503 INFO L93 Difference]: Finished difference Result 39 states and 49 transitions. [2023-12-18 18:02:19,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-18 18:02:19,504 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 25 [2023-12-18 18:02:19,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:02:19,504 INFO L225 Difference]: With dead ends: 39 [2023-12-18 18:02:19,505 INFO L226 Difference]: Without dead ends: 21 [2023-12-18 18:02:19,506 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-18 18:02:19,507 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 18:02:19,507 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 38 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 18:02:19,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-12-18 18:02:19,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-12-18 18:02:19,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-18 18:02:19,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2023-12-18 18:02:19,514 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 25 [2023-12-18 18:02:19,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:02:19,515 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2023-12-18 18:02:19,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-18 18:02:19,515 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2023-12-18 18:02:19,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-12-18 18:02:19,517 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:02:19,517 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:02:19,538 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-12-18 18:02:19,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:02:19,722 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:02:19,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:02:19,723 INFO L85 PathProgramCache]: Analyzing trace with hash 836676700, now seen corresponding path program 1 times [2023-12-18 18:02:19,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:02:19,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086038251] [2023-12-18 18:02:19,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:02:19,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:02:19,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:02:19,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-12-18 18:02:19,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:02:19,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-12-18 18:02:19,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:02:19,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-12-18 18:02:19,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:02:19,837 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-18 18:02:19,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:02:19,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086038251] [2023-12-18 18:02:19,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086038251] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:02:19,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998070287] [2023-12-18 18:02:19,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:02:19,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:02:19,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:02:19,839 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 18:02:19,842 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 18:02:19,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:02:19,901 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-18 18:02:19,903 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:02:19,907 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-18 18:02:19,907 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-18 18:02:19,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998070287] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-18 18:02:19,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-18 18:02:19,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 5 [2023-12-18 18:02:19,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593718123] [2023-12-18 18:02:19,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-18 18:02:19,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-18 18:02:19,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:02:19,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-18 18:02:19,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-18 18:02:19,909 INFO L87 Difference]: Start difference. First operand 21 states and 26 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-18 18:02:19,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:02:19,925 INFO L93 Difference]: Finished difference Result 40 states and 53 transitions. [2023-12-18 18:02:19,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-18 18:02:19,925 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2023-12-18 18:02:19,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:02:19,926 INFO L225 Difference]: With dead ends: 40 [2023-12-18 18:02:19,926 INFO L226 Difference]: Without dead ends: 24 [2023-12-18 18:02:19,926 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-18 18:02:19,927 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 3 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 18:02:19,927 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 34 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 18:02:19,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-12-18 18:02:19,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2023-12-18 18:02:19,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-18 18:02:19,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2023-12-18 18:02:19,930 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 26 [2023-12-18 18:02:19,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:02:19,931 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2023-12-18 18:02:19,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-18 18:02:19,931 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2023-12-18 18:02:19,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-12-18 18:02:19,931 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:02:19,932 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:02:19,948 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 18:02:20,137 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,SelfDestructingSolverStorable2 [2023-12-18 18:02:20,138 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:02:20,138 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:02:20,138 INFO L85 PathProgramCache]: Analyzing trace with hash -1099478403, now seen corresponding path program 1 times [2023-12-18 18:02:20,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:02:20,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706957838] [2023-12-18 18:02:20,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:02:20,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:02:20,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:02:20,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-12-18 18:02:20,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:02:20,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-12-18 18:02:20,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:02:20,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-12-18 18:02:20,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:02:20,256 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-12-18 18:02:20,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:02:20,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706957838] [2023-12-18 18:02:20,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706957838] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:02:20,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100002908] [2023-12-18 18:02:20,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:02:20,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:02:20,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:02:20,299 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 18:02:20,335 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 18:02:20,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:02:20,363 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-18 18:02:20,364 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:02:20,373 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-12-18 18:02:20,373 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-18 18:02:20,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100002908] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-18 18:02:20,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-18 18:02:20,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-12-18 18:02:20,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167805751] [2023-12-18 18:02:20,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-18 18:02:20,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-18 18:02:20,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:02:20,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-18 18:02:20,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-12-18 18:02:20,374 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-18 18:02:20,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:02:20,390 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2023-12-18 18:02:20,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-18 18:02:20,391 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 35 [2023-12-18 18:02:20,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:02:20,391 INFO L225 Difference]: With dead ends: 36 [2023-12-18 18:02:20,391 INFO L226 Difference]: Without dead ends: 23 [2023-12-18 18:02:20,392 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-12-18 18:02:20,392 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 18:02:20,392 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 37 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 18:02:20,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-12-18 18:02:20,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2023-12-18 18:02:20,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 18 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-18 18:02:20,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2023-12-18 18:02:20,395 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 35 [2023-12-18 18:02:20,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:02:20,396 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2023-12-18 18:02:20,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-18 18:02:20,396 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2023-12-18 18:02:20,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-12-18 18:02:20,397 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:02:20,397 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:02:20,402 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 18:02:20,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:02:20,600 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:02:20,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:02:20,601 INFO L85 PathProgramCache]: Analyzing trace with hash -189935555, now seen corresponding path program 1 times [2023-12-18 18:02:20,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:02:20,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984731530] [2023-12-18 18:02:20,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:02:20,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:02:20,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:02:20,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-12-18 18:02:20,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:02:20,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-12-18 18:02:20,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:02:20,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-12-18 18:02:20,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:02:20,663 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-12-18 18:02:20,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:02:20,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984731530] [2023-12-18 18:02:20,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984731530] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:02:20,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673636555] [2023-12-18 18:02:20,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:02:20,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:02:20,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:02:20,665 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 18:02:20,696 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 18:02:20,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:02:20,727 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-18 18:02:20,728 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:02:20,749 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-12-18 18:02:20,749 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 18:02:20,771 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-12-18 18:02:20,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673636555] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 18:02:20,772 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 18:02:20,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 3, 4] total 9 [2023-12-18 18:02:20,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39191482] [2023-12-18 18:02:20,772 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 18:02:20,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-18 18:02:20,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:02:20,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-18 18:02:20,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-12-18 18:02:20,773 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-12-18 18:02:20,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:02:20,809 INFO L93 Difference]: Finished difference Result 51 states and 69 transitions. [2023-12-18 18:02:20,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-18 18:02:20,810 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 36 [2023-12-18 18:02:20,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:02:20,811 INFO L225 Difference]: With dead ends: 51 [2023-12-18 18:02:20,811 INFO L226 Difference]: Without dead ends: 31 [2023-12-18 18:02:20,812 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-12-18 18:02:20,813 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 5 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 18:02:20,813 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 51 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 18:02:20,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-12-18 18:02:20,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2023-12-18 18:02:20,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-18 18:02:20,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2023-12-18 18:02:20,820 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 36 [2023-12-18 18:02:20,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:02:20,820 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2023-12-18 18:02:20,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-12-18 18:02:20,821 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2023-12-18 18:02:20,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-12-18 18:02:20,845 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:02:20,845 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:02:20,856 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 18:02:21,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:02:21,051 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:02:21,051 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:02:21,051 INFO L85 PathProgramCache]: Analyzing trace with hash -822209617, now seen corresponding path program 2 times [2023-12-18 18:02:21,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:02:21,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462405758] [2023-12-18 18:02:21,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:02:21,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:02:21,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:02:21,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-18 18:02:21,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:02:21,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-12-18 18:02:21,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:02:21,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-12-18 18:02:21,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:02:21,145 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2023-12-18 18:02:21,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:02:21,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462405758] [2023-12-18 18:02:21,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462405758] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:02:21,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320076221] [2023-12-18 18:02:21,146 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-18 18:02:21,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:02:21,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:02:21,170 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 18:02:21,176 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 18:02:21,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-18 18:02:21,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 18:02:21,261 INFO L262 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-18 18:02:21,264 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:02:21,307 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2023-12-18 18:02:21,308 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 18:02:21,348 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2023-12-18 18:02:21,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320076221] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 18:02:21,349 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 18:02:21,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 7] total 9 [2023-12-18 18:02:21,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478906092] [2023-12-18 18:02:21,349 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 18:02:21,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-18 18:02:21,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:02:21,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-18 18:02:21,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-12-18 18:02:21,352 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-12-18 18:02:21,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:02:21,381 INFO L93 Difference]: Finished difference Result 54 states and 67 transitions. [2023-12-18 18:02:21,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-18 18:02:21,381 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 48 [2023-12-18 18:02:21,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:02:21,382 INFO L225 Difference]: With dead ends: 54 [2023-12-18 18:02:21,382 INFO L226 Difference]: Without dead ends: 31 [2023-12-18 18:02:21,383 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 92 SyntacticMatches, 5 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-12-18 18:02:21,384 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 18:02:21,384 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 55 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 18:02:21,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-12-18 18:02:21,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2023-12-18 18:02:21,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 states have internal predecessors, (31), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-18 18:02:21,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2023-12-18 18:02:21,388 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 48 [2023-12-18 18:02:21,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:02:21,388 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2023-12-18 18:02:21,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-12-18 18:02:21,388 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2023-12-18 18:02:21,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-12-18 18:02:21,389 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:02:21,389 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:02:21,396 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 18:02:21,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:02:21,597 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:02:21,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:02:21,597 INFO L85 PathProgramCache]: Analyzing trace with hash -380565700, now seen corresponding path program 3 times [2023-12-18 18:02:21,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:02:21,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332064995] [2023-12-18 18:02:21,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:02:21,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:02:21,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:02:21,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-12-18 18:02:21,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:02:21,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-12-18 18:02:21,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:02:21,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-12-18 18:02:21,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:02:21,673 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-12-18 18:02:21,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:02:21,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332064995] [2023-12-18 18:02:21,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332064995] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:02:21,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124862620] [2023-12-18 18:02:21,674 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-18 18:02:21,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:02:21,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:02:21,675 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 18:02:21,692 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 18:02:21,758 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-18 18:02:21,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 18:02:21,759 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-18 18:02:21,760 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:02:21,777 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 40 proven. 3 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-12-18 18:02:21,777 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 18:02:21,800 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-12-18 18:02:21,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124862620] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 18:02:21,801 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 18:02:21,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2023-12-18 18:02:21,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126526430] [2023-12-18 18:02:21,801 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 18:02:21,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-18 18:02:21,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:02:21,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-18 18:02:21,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-12-18 18:02:21,802 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-18 18:02:21,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:02:21,833 INFO L93 Difference]: Finished difference Result 60 states and 78 transitions. [2023-12-18 18:02:21,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-18 18:02:21,834 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 50 [2023-12-18 18:02:21,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:02:21,834 INFO L225 Difference]: With dead ends: 60 [2023-12-18 18:02:21,834 INFO L226 Difference]: Without dead ends: 38 [2023-12-18 18:02:21,834 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 100 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-12-18 18:02:21,835 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 6 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 18:02:21,835 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 96 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 18:02:21,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-12-18 18:02:21,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2023-12-18 18:02:21,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 31 states have internal predecessors, (37), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-18 18:02:21,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2023-12-18 18:02:21,838 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 50 [2023-12-18 18:02:21,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:02:21,839 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2023-12-18 18:02:21,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-18 18:02:21,839 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2023-12-18 18:02:21,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-12-18 18:02:21,839 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:02:21,839 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 5, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:02:21,846 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 18:02:22,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:02:22,044 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:02:22,045 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:02:22,045 INFO L85 PathProgramCache]: Analyzing trace with hash -973344995, now seen corresponding path program 4 times [2023-12-18 18:02:22,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:02:22,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616563716] [2023-12-18 18:02:22,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:02:22,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:02:22,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:02:22,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-12-18 18:02:22,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:02:22,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-12-18 18:02:22,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:02:22,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-12-18 18:02:22,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:02:22,136 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2023-12-18 18:02:22,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:02:22,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616563716] [2023-12-18 18:02:22,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616563716] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:02:22,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331204968] [2023-12-18 18:02:22,137 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-18 18:02:22,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:02:22,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:02:22,138 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 18:02:22,178 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 18:02:22,250 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-18 18:02:22,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 18:02:22,251 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-18 18:02:22,253 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:02:22,265 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 70 proven. 12 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-12-18 18:02:22,266 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 18:02:22,313 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2023-12-18 18:02:22,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331204968] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 18:02:22,314 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 18:02:22,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 7 [2023-12-18 18:02:22,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777293598] [2023-12-18 18:02:22,314 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 18:02:22,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-18 18:02:22,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:02:22,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-18 18:02:22,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-12-18 18:02:22,315 INFO L87 Difference]: Start difference. First operand 36 states and 43 transitions. Second operand has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-18 18:02:22,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:02:22,339 INFO L93 Difference]: Finished difference Result 69 states and 88 transitions. [2023-12-18 18:02:22,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-18 18:02:22,339 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 61 [2023-12-18 18:02:22,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:02:22,340 INFO L225 Difference]: With dead ends: 69 [2023-12-18 18:02:22,340 INFO L226 Difference]: Without dead ends: 42 [2023-12-18 18:02:22,340 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 124 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-12-18 18:02:22,341 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 10 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 18:02:22,341 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 52 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 18:02:22,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2023-12-18 18:02:22,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2023-12-18 18:02:22,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 37 states have (on average 1.2162162162162162) internal successors, (45), 37 states have internal predecessors, (45), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-18 18:02:22,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 51 transitions. [2023-12-18 18:02:22,344 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 51 transitions. Word has length 61 [2023-12-18 18:02:22,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:02:22,344 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 51 transitions. [2023-12-18 18:02:22,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-18 18:02:22,344 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 51 transitions. [2023-12-18 18:02:22,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-12-18 18:02:22,345 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:02:22,345 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 5, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:02:22,352 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-12-18 18:02:22,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:02:22,550 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:02:22,551 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:02:22,551 INFO L85 PathProgramCache]: Analyzing trace with hash 1998573565, now seen corresponding path program 5 times [2023-12-18 18:02:22,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:02:22,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109899799] [2023-12-18 18:02:22,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:02:22,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:02:22,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:02:23,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-12-18 18:02:23,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:02:23,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-12-18 18:02:23,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:02:24,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-12-18 18:02:24,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:02:24,055 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 36 proven. 289 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2023-12-18 18:02:24,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:02:24,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109899799] [2023-12-18 18:02:24,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109899799] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:02:24,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309045710] [2023-12-18 18:02:24,056 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-18 18:02:24,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:02:24,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:02:24,058 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 18:02:24,096 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 18:02:24,218 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2023-12-18 18:02:24,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 18:02:24,221 INFO L262 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 72 conjunts are in the unsatisfiable core [2023-12-18 18:02:24,225 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:02:24,256 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 22 treesize of output 7 [2023-12-18 18:02:24,418 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:02:24,418 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 1 case distinctions, treesize of input 36 treesize of output 23 [2023-12-18 18:02:24,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 18:02:24,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 18:02:24,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 18:02:24,471 INFO L349 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2023-12-18 18:02:24,471 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 42 treesize of output 47 [2023-12-18 18:02:24,643 INFO L349 Elim1Store]: treesize reduction 154, result has 31.9 percent of original size [2023-12-18 18:02:24,643 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 20 case distinctions, treesize of input 84 treesize of output 120 [2023-12-18 18:02:25,509 INFO L349 Elim1Store]: treesize reduction 721, result has 22.2 percent of original size [2023-12-18 18:02:25,510 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 7 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 90 case distinctions, treesize of input 171 treesize of output 291 [2023-12-18 18:02:25,704 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:02:25,704 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 27 [2023-12-18 18:02:27,204 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 213 proven. 118 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-12-18 18:02:27,205 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 18:02:27,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309045710] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:02:27,739 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-18 18:02:27,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 30] total 47 [2023-12-18 18:02:27,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754455558] [2023-12-18 18:02:27,740 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-18 18:02:27,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-12-18 18:02:27,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:02:27,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-12-18 18:02:27,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=2065, Unknown=0, NotChecked=0, Total=2256 [2023-12-18 18:02:27,742 INFO L87 Difference]: Start difference. First operand 42 states and 51 transitions. Second operand has 47 states, 45 states have (on average 1.8222222222222222) internal successors, (82), 45 states have internal predecessors, (82), 4 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2023-12-18 18:02:45,383 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] [2023-12-18 18:02:49,756 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 18:03:03,413 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 18:03:07,624 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 18:03:28,493 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 18:03:32,690 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 18:05:06,424 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.77s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 18:06:06,587 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.16s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 18:06:06,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:06:06,798 INFO L93 Difference]: Finished difference Result 234 states and 292 transitions. [2023-12-18 18:06:06,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2023-12-18 18:06:06,799 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 45 states have (on average 1.8222222222222222) internal successors, (82), 45 states have internal predecessors, (82), 4 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) Word has length 79 [2023-12-18 18:06:06,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:06:06,801 INFO L225 Difference]: With dead ends: 234 [2023-12-18 18:06:06,802 INFO L226 Difference]: Without dead ends: 173 [2023-12-18 18:06:06,804 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2448 ImplicationChecksByTransitivity, 187.6s TimeCoverageRelationStatistics Valid=917, Invalid=6886, Unknown=29, NotChecked=0, Total=7832 [2023-12-18 18:06:06,804 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 128 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 1405 mSolverCounterSat, 14 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 32.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 1424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1405 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 33.0s IncrementalHoareTripleChecker+Time [2023-12-18 18:06:06,805 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 170 Invalid, 1424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1405 Invalid, 5 Unknown, 0 Unchecked, 33.0s Time] [2023-12-18 18:06:06,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2023-12-18 18:06:06,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 111. [2023-12-18 18:06:06,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 102 states have (on average 1.2843137254901962) internal successors, (131), 103 states have internal predecessors, (131), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2023-12-18 18:06:06,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 144 transitions. [2023-12-18 18:06:06,822 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 144 transitions. Word has length 79 [2023-12-18 18:06:06,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:06:06,824 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 144 transitions. [2023-12-18 18:06:06,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 45 states have (on average 1.8222222222222222) internal successors, (82), 45 states have internal predecessors, (82), 4 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2023-12-18 18:06:06,825 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 144 transitions. [2023-12-18 18:06:06,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-12-18 18:06:06,828 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:06:06,828 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 14, 5, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:06:06,834 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 18:06:07,032 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,SelfDestructingSolverStorable8 [2023-12-18 18:06:07,033 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:06:07,033 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:06:07,033 INFO L85 PathProgramCache]: Analyzing trace with hash -50814277, now seen corresponding path program 1 times [2023-12-18 18:06:07,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:06:07,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590177015] [2023-12-18 18:06:07,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:06:07,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:06:07,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:06:08,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-12-18 18:06:08,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:06:08,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-12-18 18:06:08,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:06:08,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-12-18 18:06:08,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:06:09,404 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 90 proven. 261 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-12-18 18:06:09,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:06:09,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590177015] [2023-12-18 18:06:09,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590177015] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:06:09,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766300975] [2023-12-18 18:06:09,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:06:09,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:06:09,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:06:09,444 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 18:06:09,446 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 18:06:09,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:06:09,561 INFO L262 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 89 conjunts are in the unsatisfiable core [2023-12-18 18:06:09,563 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:06:10,263 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:06:10,263 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 62 treesize of output 54 [2023-12-18 18:06:10,327 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:06:10,327 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 62 treesize of output 54 [2023-12-18 18:06:10,394 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:06:10,394 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 62 treesize of output 47 [2023-12-18 18:06:10,461 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:06:10,461 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 62 treesize of output 47 [2023-12-18 18:06:10,530 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:06:10,530 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 66 treesize of output 44 [2023-12-18 18:06:11,354 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 180 proven. 180 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-12-18 18:06:11,354 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 18:06:12,501 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:06:12,501 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 65 treesize of output 1 [2023-12-18 18:06:13,365 INFO L349 Elim1Store]: treesize reduction 19, result has 85.4 percent of original size [2023-12-18 18:06:13,365 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 84 treesize of output 131 [2023-12-18 18:06:13,556 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 202 proven. 142 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2023-12-18 18:06:13,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766300975] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 18:06:13,557 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 18:06:13,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 36, 30] total 90 [2023-12-18 18:06:13,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374642196] [2023-12-18 18:06:13,557 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 18:06:13,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2023-12-18 18:06:13,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:06:13,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2023-12-18 18:06:13,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=400, Invalid=7610, Unknown=0, NotChecked=0, Total=8010 [2023-12-18 18:06:13,560 INFO L87 Difference]: Start difference. First operand 111 states and 144 transitions. Second operand has 90 states, 87 states have (on average 1.6896551724137931) internal successors, (147), 86 states have internal predecessors, (147), 6 states have call successors, (8), 2 states have call predecessors, (8), 7 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) [2023-12-18 18:06:31,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:06:31,257 INFO L93 Difference]: Finished difference Result 1194 states and 1740 transitions. [2023-12-18 18:06:31,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 262 states. [2023-12-18 18:06:31,257 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 87 states have (on average 1.6896551724137931) internal successors, (147), 86 states have internal predecessors, (147), 6 states have call successors, (8), 2 states have call predecessors, (8), 7 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) Word has length 79 [2023-12-18 18:06:31,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:06:31,262 INFO L225 Difference]: With dead ends: 1194 [2023-12-18 18:06:31,262 INFO L226 Difference]: Without dead ends: 963 [2023-12-18 18:06:31,275 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 436 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 322 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36150 ImplicationChecksByTransitivity, 17.6s TimeCoverageRelationStatistics Valid=7651, Invalid=97001, Unknown=0, NotChecked=0, Total=104652 [2023-12-18 18:06:31,275 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 487 mSDsluCounter, 877 mSDsCounter, 0 mSdLazyCounter, 5218 mSolverCounterSat, 253 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 493 SdHoareTripleChecker+Valid, 906 SdHoareTripleChecker+Invalid, 5471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 253 IncrementalHoareTripleChecker+Valid, 5218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2023-12-18 18:06:31,275 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [493 Valid, 906 Invalid, 5471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [253 Valid, 5218 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2023-12-18 18:06:31,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 963 states. [2023-12-18 18:06:31,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 963 to 488. [2023-12-18 18:06:31,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 448 states have (on average 1.3482142857142858) internal successors, (604), 464 states have internal predecessors, (604), 16 states have call successors, (16), 6 states have call predecessors, (16), 23 states have return successors, (123), 17 states have call predecessors, (123), 16 states have call successors, (123) [2023-12-18 18:06:31,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 743 transitions. [2023-12-18 18:06:31,379 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 743 transitions. Word has length 79 [2023-12-18 18:06:31,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:06:31,380 INFO L495 AbstractCegarLoop]: Abstraction has 488 states and 743 transitions. [2023-12-18 18:06:31,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 87 states have (on average 1.6896551724137931) internal successors, (147), 86 states have internal predecessors, (147), 6 states have call successors, (8), 2 states have call predecessors, (8), 7 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) [2023-12-18 18:06:31,380 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 743 transitions. [2023-12-18 18:06:31,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-12-18 18:06:31,384 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:06:31,384 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 13, 5, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:06:31,391 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 18:06:31,588 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,SelfDestructingSolverStorable9 [2023-12-18 18:06:31,589 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:06:31,589 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:06:31,590 INFO L85 PathProgramCache]: Analyzing trace with hash -860160903, now seen corresponding path program 2 times [2023-12-18 18:06:31,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:06:31,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066941075] [2023-12-18 18:06:31,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:06:31,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:06:31,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:06:33,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-12-18 18:06:33,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:06:33,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-12-18 18:06:33,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:06:34,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-12-18 18:06:34,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:06:35,325 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 5 proven. 385 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-18 18:06:35,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:06:35,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066941075] [2023-12-18 18:06:35,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066941075] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:06:35,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386933537] [2023-12-18 18:06:35,326 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-18 18:06:35,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:06:35,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:06:35,327 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 18:06:35,331 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 18:06:35,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-18 18:06:35,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 18:06:35,494 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 158 conjunts are in the unsatisfiable core [2023-12-18 18:06:35,498 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:06:35,516 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 18:06:37,078 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-12-18 18:06:37,078 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 129 treesize of output 83 [2023-12-18 18:06:39,319 INFO L349 Elim1Store]: treesize reduction 44, result has 31.3 percent of original size [2023-12-18 18:06:39,319 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 37 case distinctions, treesize of input 139 treesize of output 131 [2023-12-18 18:06:39,501 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-12-18 18:06:39,501 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 101 treesize of output 80 [2023-12-18 18:06:39,673 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-12-18 18:06:39,674 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 101 treesize of output 73 [2023-12-18 18:06:39,845 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-12-18 18:06:39,846 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 101 treesize of output 73 [2023-12-18 18:06:40,036 INFO L349 Elim1Store]: treesize reduction 16, result has 55.6 percent of original size [2023-12-18 18:06:40,036 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 101 treesize of output 78 [2023-12-18 18:06:41,219 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:06:41,219 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 140 treesize of output 92 [2023-12-18 18:06:41,486 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 1 proven. 395 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-18 18:06:41,486 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 18:07:03,814 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 7 proven. 370 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-12-18 18:07:03,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1386933537] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 18:07:03,815 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 18:07:03,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 57, 47] total 152 [2023-12-18 18:07:03,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734983433] [2023-12-18 18:07:03,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 18:07:03,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 152 states [2023-12-18 18:07:03,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:07:03,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 152 interpolants. [2023-12-18 18:07:03,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=739, Invalid=22209, Unknown=4, NotChecked=0, Total=22952 [2023-12-18 18:07:03,822 INFO L87 Difference]: Start difference. First operand 488 states and 743 transitions. Second operand has 152 states, 139 states have (on average 1.4460431654676258) internal successors, (201), 141 states have internal predecessors, (201), 9 states have call successors, (9), 4 states have call predecessors, (9), 9 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2023-12-18 18:07:07,871 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] [2023-12-18 18:07:11,470 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.53s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 18:07:15,541 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 18:07:19,616 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 18:07:23,693 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 18:08:09,737 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 18:08:13,780 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 18:08:17,795 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 18:08:21,803 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 18:08:54,588 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] [2023-12-18 18:08:54,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:08:54,719 INFO L93 Difference]: Finished difference Result 2538 states and 3712 transitions. [2023-12-18 18:08:54,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 410 states. [2023-12-18 18:08:54,720 INFO L78 Accepts]: Start accepts. Automaton has has 152 states, 139 states have (on average 1.4460431654676258) internal successors, (201), 141 states have internal predecessors, (201), 9 states have call successors, (9), 4 states have call predecessors, (9), 9 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) Word has length 79 [2023-12-18 18:08:54,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:08:54,732 INFO L225 Difference]: With dead ends: 2538 [2023-12-18 18:08:54,732 INFO L226 Difference]: Without dead ends: 2280 [2023-12-18 18:08:54,751 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 589 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 518 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97727 ImplicationChecksByTransitivity, 88.9s TimeCoverageRelationStatistics Valid=9238, Invalid=260638, Unknown=4, NotChecked=0, Total=269880 [2023-12-18 18:08:54,752 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 613 mSDsluCounter, 685 mSDsCounter, 0 mSdLazyCounter, 12581 mSolverCounterSat, 402 mSolverCounterUnsat, 10 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 47.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 628 SdHoareTripleChecker+Valid, 700 SdHoareTripleChecker+Invalid, 12993 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 402 IncrementalHoareTripleChecker+Valid, 12581 IncrementalHoareTripleChecker+Invalid, 10 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 48.5s IncrementalHoareTripleChecker+Time [2023-12-18 18:08:54,752 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [628 Valid, 700 Invalid, 12993 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [402 Valid, 12581 Invalid, 10 Unknown, 0 Unchecked, 48.5s Time] [2023-12-18 18:08:54,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2280 states. [2023-12-18 18:08:54,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2280 to 962. [2023-12-18 18:08:54,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 962 states, 872 states have (on average 1.3325688073394495) internal successors, (1162), 914 states have internal predecessors, (1162), 38 states have call successors, (38), 12 states have call predecessors, (38), 51 states have return successors, (263), 35 states have call predecessors, (263), 38 states have call successors, (263) [2023-12-18 18:08:55,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 962 states to 962 states and 1463 transitions. [2023-12-18 18:08:55,004 INFO L78 Accepts]: Start accepts. Automaton has 962 states and 1463 transitions. Word has length 79 [2023-12-18 18:08:55,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:08:55,005 INFO L495 AbstractCegarLoop]: Abstraction has 962 states and 1463 transitions. [2023-12-18 18:08:55,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 152 states, 139 states have (on average 1.4460431654676258) internal successors, (201), 141 states have internal predecessors, (201), 9 states have call successors, (9), 4 states have call predecessors, (9), 9 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2023-12-18 18:08:55,005 INFO L276 IsEmpty]: Start isEmpty. Operand 962 states and 1463 transitions. [2023-12-18 18:08:55,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-12-18 18:08:55,025 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:08:55,025 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 12, 5, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:08:55,034 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-12-18 18:08:55,226 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,SelfDestructingSolverStorable10 [2023-12-18 18:08:55,226 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:08:55,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:08:55,226 INFO L85 PathProgramCache]: Analyzing trace with hash -159096325, now seen corresponding path program 3 times [2023-12-18 18:08:55,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:08:55,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463130828] [2023-12-18 18:08:55,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:08:55,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:08:55,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:08:56,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-12-18 18:08:56,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:08:56,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-12-18 18:08:56,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:08:56,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-12-18 18:08:56,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:08:56,751 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 177 proven. 175 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-12-18 18:08:56,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:08:56,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463130828] [2023-12-18 18:08:56,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463130828] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:08:56,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461025927] [2023-12-18 18:08:56,752 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-18 18:08:56,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:08:56,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:08:56,753 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 18:08:56,776 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-18 18:08:56,972 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2023-12-18 18:08:56,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 18:08:56,975 INFO L262 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 75 conjunts are in the unsatisfiable core [2023-12-18 18:08:56,977 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:08:57,014 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 8 treesize of output 1 [2023-12-18 18:08:57,266 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:08:57,267 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 34 [2023-12-18 18:08:57,313 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:08:57,313 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 40 treesize of output 44 [2023-12-18 18:08:57,356 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:08:57,356 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 37 [2023-12-18 18:08:57,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 18:08:57,417 INFO L349 Elim1Store]: treesize reduction 52, result has 26.8 percent of original size [2023-12-18 18:08:57,417 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 46 treesize of output 54 [2023-12-18 18:08:57,536 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:08:57,537 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 23 [2023-12-18 18:09:01,569 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 231 proven. 101 refuted. 1 times theorem prover too weak. 64 trivial. 0 not checked. [2023-12-18 18:09:01,569 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 18:09:03,119 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 176 proven. 161 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-12-18 18:09:03,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461025927] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 18:09:03,119 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 18:09:03,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 28] total 78 [2023-12-18 18:09:03,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263235641] [2023-12-18 18:09:03,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 18:09:03,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2023-12-18 18:09:03,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:09:03,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2023-12-18 18:09:03,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=432, Invalid=5571, Unknown=3, NotChecked=0, Total=6006 [2023-12-18 18:09:03,121 INFO L87 Difference]: Start difference. First operand 962 states and 1463 transitions. Second operand has 78 states, 78 states have (on average 1.7179487179487178) internal successors, (134), 75 states have internal predecessors, (134), 4 states have call successors, (7), 2 states have call predecessors, (7), 6 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-12-18 18:09:12,870 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] [2023-12-18 18:09:33,000 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 18:09:35,880 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 18:09:37,813 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.91s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 18:09:40,838 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 18:09:45,082 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 18:09:46,182 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 18:09:48,517 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 18:10:07,285 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 18:10:16,626 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.77s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 18:10:34,477 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 18:10:42,937 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 18:10:47,256 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 18:10:51,388 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 18:11:46,033 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 18:11:50,927 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 18:12:03,086 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 18:12:04,785 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 18:12:34,346 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 18:12:38,973 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 18:12:43,626 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 18:12:47,735 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 18:13:21,927 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.68s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 18:13:25,938 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 18:13:41,451 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 18:14:03,708 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 18:14:06,585 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 18:14:10,855 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] [2023-12-18 18:14:23,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:14:23,993 INFO L93 Difference]: Finished difference Result 4366 states and 7561 transitions. [2023-12-18 18:14:23,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 373 states. [2023-12-18 18:14:23,993 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 1.7179487179487178) internal successors, (134), 75 states have internal predecessors, (134), 4 states have call successors, (7), 2 states have call predecessors, (7), 6 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 79 [2023-12-18 18:14:23,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:14:24,008 INFO L225 Difference]: With dead ends: 4366 [2023-12-18 18:14:24,008 INFO L226 Difference]: Without dead ends: 3930 [2023-12-18 18:14:24,020 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 566 GetRequests, 139 SyntacticMatches, 1 SemanticMatches, 426 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70278 ImplicationChecksByTransitivity, 234.6s TimeCoverageRelationStatistics Valid=17646, Invalid=165036, Unknown=74, NotChecked=0, Total=182756 [2023-12-18 18:14:24,020 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 573 mSDsluCounter, 411 mSDsCounter, 0 mSdLazyCounter, 5777 mSolverCounterSat, 200 mSolverCounterUnsat, 34 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 90.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 576 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 6011 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 5777 IncrementalHoareTripleChecker+Invalid, 34 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 91.4s IncrementalHoareTripleChecker+Time [2023-12-18 18:14:24,020 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [576 Valid, 426 Invalid, 6011 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 5777 Invalid, 34 Unknown, 0 Unchecked, 91.4s Time] [2023-12-18 18:14:24,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3930 states. [2023-12-18 18:14:24,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3930 to 2057. [2023-12-18 18:14:24,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2057 states, 1918 states have (on average 1.4207507820646508) internal successors, (2725), 1998 states have internal predecessors, (2725), 46 states have call successors, (46), 15 states have call predecessors, (46), 92 states have return successors, (524), 43 states have call predecessors, (524), 46 states have call successors, (524) [2023-12-18 18:14:24,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2057 states to 2057 states and 3295 transitions. [2023-12-18 18:14:24,508 INFO L78 Accepts]: Start accepts. Automaton has 2057 states and 3295 transitions. Word has length 79 [2023-12-18 18:14:24,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:14:24,508 INFO L495 AbstractCegarLoop]: Abstraction has 2057 states and 3295 transitions. [2023-12-18 18:14:24,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 1.7179487179487178) internal successors, (134), 75 states have internal predecessors, (134), 4 states have call successors, (7), 2 states have call predecessors, (7), 6 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-12-18 18:14:24,509 INFO L276 IsEmpty]: Start isEmpty. Operand 2057 states and 3295 transitions. [2023-12-18 18:14:24,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-12-18 18:14:24,519 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:14:24,519 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 11, 5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:14:24,526 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 18:14:24,726 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,SelfDestructingSolverStorable11 [2023-12-18 18:14:24,727 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:14:24,727 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:14:24,727 INFO L85 PathProgramCache]: Analyzing trace with hash -1170213575, now seen corresponding path program 4 times [2023-12-18 18:14:24,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:14:24,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217970069] [2023-12-18 18:14:24,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:14:24,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:14:24,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:14:25,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-12-18 18:14:25,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:14:26,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-12-18 18:14:26,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:14:26,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-12-18 18:14:26,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:14:26,677 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 91 proven. 264 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-12-18 18:14:26,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:14:26,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217970069] [2023-12-18 18:14:26,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217970069] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:14:26,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570656400] [2023-12-18 18:14:26,678 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-18 18:14:26,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:14:26,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:14:26,681 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 18:14:26,682 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 18:14:26,824 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-18 18:14:26,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 18:14:26,826 INFO L262 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 100 conjunts are in the unsatisfiable core [2023-12-18 18:14:26,829 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:14:26,842 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 18:14:27,227 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:14:27,228 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 49 treesize of output 39 [2023-12-18 18:14:27,595 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:14:27,595 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 46 [2023-12-18 18:14:27,653 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:14:27,654 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 53 treesize of output 49 [2023-12-18 18:14:27,716 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:14:27,716 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 53 treesize of output 42 [2023-12-18 18:14:27,773 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:14:27,773 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 53 treesize of output 42 [2023-12-18 18:14:27,881 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:14:27,881 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 53 treesize of output 35 [2023-12-18 18:14:28,598 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 10 proven. 380 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-18 18:14:28,599 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 18:14:30,102 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 118 proven. 224 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-12-18 18:14:30,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570656400] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 18:14:30,103 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 18:14:30,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 39, 27] total 87 [2023-12-18 18:14:30,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11288983] [2023-12-18 18:14:30,103 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 18:14:30,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2023-12-18 18:14:30,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:14:30,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2023-12-18 18:14:30,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=405, Invalid=7077, Unknown=0, NotChecked=0, Total=7482 [2023-12-18 18:14:30,105 INFO L87 Difference]: Start difference. First operand 2057 states and 3295 transitions. Second operand has 87 states, 86 states have (on average 1.813953488372093) internal successors, (156), 86 states have internal predecessors, (156), 8 states have call successors, (8), 3 states have call predecessors, (8), 8 states have return successors, (9), 4 states have call predecessors, (9), 8 states have call successors, (9) [2023-12-18 18:14:42,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:14:42,066 INFO L93 Difference]: Finished difference Result 4459 states and 7105 transitions. [2023-12-18 18:14:42,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 172 states. [2023-12-18 18:14:42,079 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 86 states have (on average 1.813953488372093) internal successors, (156), 86 states have internal predecessors, (156), 8 states have call successors, (8), 3 states have call predecessors, (8), 8 states have return successors, (9), 4 states have call predecessors, (9), 8 states have call successors, (9) Word has length 79 [2023-12-18 18:14:42,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:14:42,093 INFO L225 Difference]: With dead ends: 4459 [2023-12-18 18:14:42,093 INFO L226 Difference]: Without dead ends: 3950 [2023-12-18 18:14:42,100 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 112 SyntacticMatches, 1 SemanticMatches, 227 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17266 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=3608, Invalid=48604, Unknown=0, NotChecked=0, Total=52212 [2023-12-18 18:14:42,101 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 224 mSDsluCounter, 918 mSDsCounter, 0 mSdLazyCounter, 6736 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 948 SdHoareTripleChecker+Invalid, 6835 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 6736 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2023-12-18 18:14:42,101 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [228 Valid, 948 Invalid, 6835 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 6736 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2023-12-18 18:14:42,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3950 states. [2023-12-18 18:14:42,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3950 to 2845. [2023-12-18 18:14:42,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2845 states, 2647 states have (on average 1.4068757083490744) internal successors, (3724), 2764 states have internal predecessors, (3724), 61 states have call successors, (61), 18 states have call predecessors, (61), 136 states have return successors, (745), 62 states have call predecessors, (745), 61 states have call successors, (745) [2023-12-18 18:14:42,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2845 states to 2845 states and 4530 transitions. [2023-12-18 18:14:42,595 INFO L78 Accepts]: Start accepts. Automaton has 2845 states and 4530 transitions. Word has length 79 [2023-12-18 18:14:42,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:14:42,595 INFO L495 AbstractCegarLoop]: Abstraction has 2845 states and 4530 transitions. [2023-12-18 18:14:42,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 86 states have (on average 1.813953488372093) internal successors, (156), 86 states have internal predecessors, (156), 8 states have call successors, (8), 3 states have call predecessors, (8), 8 states have return successors, (9), 4 states have call predecessors, (9), 8 states have call successors, (9) [2023-12-18 18:14:42,595 INFO L276 IsEmpty]: Start isEmpty. Operand 2845 states and 4530 transitions. [2023-12-18 18:14:42,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-12-18 18:14:42,608 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:14:42,608 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 10, 5, 5, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:14:42,622 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 18:14:42,815 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,SelfDestructingSolverStorable12 [2023-12-18 18:14:42,815 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:14:42,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:14:42,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1536405819, now seen corresponding path program 5 times [2023-12-18 18:14:42,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:14:42,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992081846] [2023-12-18 18:14:42,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:14:42,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:14:42,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:14:43,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-12-18 18:14:43,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:14:44,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-12-18 18:14:44,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:14:44,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-12-18 18:14:44,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:14:44,645 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 91 proven. 261 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-12-18 18:14:44,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:14:44,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992081846] [2023-12-18 18:14:44,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992081846] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:14:44,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562622894] [2023-12-18 18:14:44,645 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-18 18:14:44,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:14:44,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:14:44,646 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 18:14:44,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-18 18:14:44,890 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2023-12-18 18:14:44,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 18:14:44,893 INFO L262 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 59 conjunts are in the unsatisfiable core [2023-12-18 18:14:44,896 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:14:44,907 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 22 treesize of output 7 [2023-12-18 18:14:45,206 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:14:45,207 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 29 treesize of output 27 [2023-12-18 18:14:45,254 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:14:45,254 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 30 [2023-12-18 18:14:45,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 18:14:45,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 18:14:45,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 18:14:45,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 18:14:45,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 18:14:45,327 INFO L349 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2023-12-18 18:14:45,328 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 46 treesize of output 54 [2023-12-18 18:14:45,495 INFO L349 Elim1Store]: treesize reduction 194, result has 28.9 percent of original size [2023-12-18 18:14:45,495 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 27 case distinctions, treesize of input 88 treesize of output 127 [2023-12-18 18:14:46,950 INFO L349 Elim1Store]: treesize reduction 244, result has 26.7 percent of original size [2023-12-18 18:14:46,951 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 40 case distinctions, treesize of input 105 treesize of output 146 [2023-12-18 18:14:48,108 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 184 proven. 155 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-12-18 18:14:48,108 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 18:14:48,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562622894] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:14:48,277 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-18 18:14:48,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 27] total 57 [2023-12-18 18:14:48,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729106808] [2023-12-18 18:14:48,278 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-18 18:14:48,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2023-12-18 18:14:48,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:14:48,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2023-12-18 18:14:48,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=3110, Unknown=2, NotChecked=0, Total=3306 [2023-12-18 18:14:48,301 INFO L87 Difference]: Start difference. First operand 2845 states and 4530 transitions. Second operand has 57 states, 56 states have (on average 1.7678571428571428) internal successors, (99), 54 states have internal predecessors, (99), 4 states have call successors, (5), 2 states have call predecessors, (5), 5 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2023-12-18 18:14:54,992 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] [2023-12-18 18:15:03,073 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 18:15:33,903 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 18:15:50,555 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.31s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 18:15:51,887 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 18:15:55,942 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 18:16:00,606 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 18:16:04,786 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] [2023-12-18 18:16:10,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:16:10,211 INFO L93 Difference]: Finished difference Result 8557 states and 12964 transitions. [2023-12-18 18:16:10,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 152 states. [2023-12-18 18:16:10,211 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 56 states have (on average 1.7678571428571428) internal successors, (99), 54 states have internal predecessors, (99), 4 states have call successors, (5), 2 states have call predecessors, (5), 5 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Word has length 79 [2023-12-18 18:16:10,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:16:10,235 INFO L225 Difference]: With dead ends: 8557 [2023-12-18 18:16:10,235 INFO L226 Difference]: Without dead ends: 6502 [2023-12-18 18:16:10,248 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11803 ImplicationChecksByTransitivity, 47.4s TimeCoverageRelationStatistics Valid=2273, Invalid=31021, Unknown=12, NotChecked=0, Total=33306 [2023-12-18 18:16:10,249 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 191 mSDsluCounter, 653 mSDsCounter, 0 mSdLazyCounter, 4749 mSolverCounterSat, 50 mSolverCounterUnsat, 12 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 35.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 677 SdHoareTripleChecker+Invalid, 4811 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 4749 IncrementalHoareTripleChecker+Invalid, 12 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 35.9s IncrementalHoareTripleChecker+Time [2023-12-18 18:16:10,249 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [196 Valid, 677 Invalid, 4811 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 4749 Invalid, 12 Unknown, 0 Unchecked, 35.9s Time] [2023-12-18 18:16:10,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6502 states. [2023-12-18 18:16:11,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6502 to 4295. [2023-12-18 18:16:11,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4295 states, 4014 states have (on average 1.3756851021425012) internal successors, (5522), 4170 states have internal predecessors, (5522), 86 states have call successors, (86), 32 states have call predecessors, (86), 194 states have return successors, (879), 92 states have call predecessors, (879), 86 states have call successors, (879) [2023-12-18 18:16:11,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4295 states to 4295 states and 6487 transitions. [2023-12-18 18:16:11,115 INFO L78 Accepts]: Start accepts. Automaton has 4295 states and 6487 transitions. Word has length 79 [2023-12-18 18:16:11,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:16:11,115 INFO L495 AbstractCegarLoop]: Abstraction has 4295 states and 6487 transitions. [2023-12-18 18:16:11,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 56 states have (on average 1.7678571428571428) internal successors, (99), 54 states have internal predecessors, (99), 4 states have call successors, (5), 2 states have call predecessors, (5), 5 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2023-12-18 18:16:11,116 INFO L276 IsEmpty]: Start isEmpty. Operand 4295 states and 6487 transitions. [2023-12-18 18:16:11,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-12-18 18:16:11,133 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:16:11,133 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 9, 6, 5, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:16:11,150 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-12-18 18:16:11,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-12-18 18:16:11,339 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:16:11,339 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:16:11,339 INFO L85 PathProgramCache]: Analyzing trace with hash 718757369, now seen corresponding path program 6 times [2023-12-18 18:16:11,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:16:11,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545122143] [2023-12-18 18:16:11,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:16:11,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:16:11,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:16:11,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-12-18 18:16:11,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:16:12,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-12-18 18:16:12,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:16:12,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-12-18 18:16:12,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:16:12,649 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 88 proven. 264 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-12-18 18:16:12,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:16:12,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545122143] [2023-12-18 18:16:12,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545122143] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:16:12,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991521582] [2023-12-18 18:16:12,649 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-18 18:16:12,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:16:12,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:16:12,651 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 18:16:12,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-12-18 18:16:13,014 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-12-18 18:16:13,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 18:16:13,016 INFO L262 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 56 conjunts are in the unsatisfiable core [2023-12-18 18:16:13,019 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:16:13,026 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-12-18 18:16:13,149 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:16:13,149 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 1 case distinctions, treesize of input 41 treesize of output 18 [2023-12-18 18:16:13,316 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 18 [2023-12-18 18:16:13,357 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:16:13,358 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 28 [2023-12-18 18:16:13,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 18:16:13,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 18:16:13,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 18:16:13,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 18:16:13,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 18:16:13,425 INFO L349 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2023-12-18 18:16:13,425 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 40 treesize of output 52 [2023-12-18 18:16:17,651 INFO L349 Elim1Store]: treesize reduction 132, result has 51.6 percent of original size [2023-12-18 18:16:17,652 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 7 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 27 case distinctions, treesize of input 73 treesize of output 178 Received shutdown request... [2023-12-18 18:16:39,821 WARN L235 SmtUtils]: Removed 248 from assertion stack [2023-12-18 18:16:39,823 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-18 18:16:39,835 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-12-18 18:16:39,840 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 18:16:39,850 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-18 18:16:40,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:16:40,024 WARN L619 AbstractCegarLoop]: Verification canceled: while NwaCegarLoop was analyzing trace of length 80 with TraceHistMax 15,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 952 for 859ms.. [2023-12-18 18:16:40,027 INFO L445 BasicCegarLoop]: Path program histogram: [6, 5, 1, 1, 1, 1] [2023-12-18 18:16:40,042 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-12-18 18:16:40,045 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.12 06:16:40 BoogieIcfgContainer [2023-12-18 18:16:40,045 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-18 18:16:40,045 INFO L158 Benchmark]: Toolchain (without parser) took 861698.26ms. Allocated memory was 305.1MB in the beginning and 924.8MB in the end (delta: 619.7MB). Free memory was 260.9MB in the beginning and 517.7MB in the end (delta: -256.8MB). Peak memory consumption was 363.9MB. Max. memory is 8.0GB. [2023-12-18 18:16:40,046 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 180.4MB. Free memory is still 128.2MB. There was no memory consumed. Max. memory is 8.0GB. [2023-12-18 18:16:40,046 INFO L158 Benchmark]: CACSL2BoogieTranslator took 157.76ms. Allocated memory is still 305.1MB. Free memory was 260.4MB in the beginning and 249.3MB in the end (delta: 11.0MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-12-18 18:16:40,046 INFO L158 Benchmark]: Boogie Procedure Inliner took 22.12ms. Allocated memory is still 305.1MB. Free memory was 249.3MB in the beginning and 247.8MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-12-18 18:16:40,046 INFO L158 Benchmark]: Boogie Preprocessor took 27.74ms. Allocated memory is still 305.1MB. Free memory was 247.8MB in the beginning and 245.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-18 18:16:40,046 INFO L158 Benchmark]: RCFGBuilder took 268.60ms. Allocated memory is still 305.1MB. Free memory was 245.7MB in the beginning and 232.0MB in the end (delta: 13.6MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. [2023-12-18 18:16:40,046 INFO L158 Benchmark]: TraceAbstraction took 861217.91ms. Allocated memory was 305.1MB in the beginning and 924.8MB in the end (delta: 619.7MB). Free memory was 231.0MB in the beginning and 517.7MB in the end (delta: -286.7MB). Peak memory consumption was 334.6MB. Max. memory is 8.0GB. [2023-12-18 18:16:40,047 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 180.4MB. Free memory is still 128.2MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 157.76ms. Allocated memory is still 305.1MB. Free memory was 260.4MB in the beginning and 249.3MB in the end (delta: 11.0MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 22.12ms. Allocated memory is still 305.1MB. Free memory was 249.3MB in the beginning and 247.8MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 27.74ms. Allocated memory is still 305.1MB. Free memory was 247.8MB in the beginning and 245.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 268.60ms. Allocated memory is still 305.1MB. Free memory was 245.7MB in the beginning and 232.0MB in the end (delta: 13.6MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. * TraceAbstraction took 861217.91ms. Allocated memory was 305.1MB in the beginning and 924.8MB in the end (delta: 619.7MB). Free memory was 231.0MB in the beginning and 517.7MB in the end (delta: -286.7MB). Peak memory consumption was 334.6MB. 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: 50]: Timeout (TraceAbstraction) Unable to prove that a call to reach_error is unreachable (line 50). Cancelled while NwaCegarLoop was analyzing trace of length 80 with TraceHistMax 15,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 952 for 859ms.. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 22 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 861.2s, OverallIterations: 15, TraceHistogramMax: 15, PathProgramHistogramMax: 6, EmptinessCheckTime: 0.1s, AutomataDifference: 762.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 61 mSolverCounterUnknown, 2280 SdHoareTripleChecker+Valid, 215.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2240 mSDsluCounter, 4211 SdHoareTripleChecker+Invalid, 212.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 3930 mSDsCounter, 1020 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 36647 IncrementalHoareTripleChecker+Invalid, 37728 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1020 mSolverCounterUnsat, 281 mSDtfsCounter, 36647 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2892 GetRequests, 1082 SyntacticMatches, 12 SemanticMatches, 1798 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235727 ImplicationChecksByTransitivity, 587.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=4295occurred in iteration=14, InterpolantAutomatonStates: 1480, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 2.3s AutomataMinimizationTime, 14 MinimizatonAttempts, 7046 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 62.2s InterpolantComputationTime, 1535 NumberOfCodeBlocks, 1503 NumberOfCodeBlocksAsserted, 64 NumberOfCheckSat, 2011 ConstructedInterpolants, 187 QuantifiedInterpolants, 30677 SizeOfPredicates, 153 NumberOfNonLiveVariables, 3398 ConjunctsInSsa, 577 ConjunctsInUnsatCore, 35 InterpolantComputations, 4 PerfectInterpolantSequences, 3494/7625 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