/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.use.bitabs.translation true -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/array-tiling/nr4.c -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-18 18:29:23,907 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-18 18:29:23,974 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 18:29:23,979 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-18 18:29:23,979 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-18 18:29:24,000 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-18 18:29:24,000 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-18 18:29:24,001 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-18 18:29:24,001 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-18 18:29:24,004 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-18 18:29:24,004 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-18 18:29:24,005 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-18 18:29:24,005 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-18 18:29:24,006 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-18 18:29:24,006 INFO L153 SettingsManager]: * Use SBE=true [2023-12-18 18:29:24,006 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-18 18:29:24,006 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-18 18:29:24,006 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-18 18:29:24,007 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-18 18:29:24,007 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-18 18:29:24,008 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-18 18:29:24,008 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-18 18:29:24,008 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-18 18:29:24,008 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-18 18:29:24,008 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-18 18:29:24,008 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-18 18:29:24,009 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-18 18:29:24,009 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-18 18:29:24,009 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-18 18:29:24,009 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-18 18:29:24,010 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-18 18:29:24,010 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-18 18:29:24,010 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-18 18:29:24,010 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-18 18:29:24,010 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-18 18:29:24,011 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-18 18:29:24,011 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-18 18:29:24,011 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-18 18:29:24,011 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-18 18:29:24,011 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-18 18:29:24,011 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-18 18:29:24,011 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-18 18:29:24,011 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-18 18:29:24,011 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> true [2023-12-18 18:29:24,222 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-18 18:29:24,247 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-18 18:29:24,248 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-18 18:29:24,249 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-18 18:29:24,249 INFO L274 PluginConnector]: CDTParser initialized [2023-12-18 18:29:24,250 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-tiling/nr4.c [2023-12-18 18:29:25,381 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-18 18:29:25,510 INFO L384 CDTParser]: Found 1 translation units. [2023-12-18 18:29:25,510 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-tiling/nr4.c [2023-12-18 18:29:25,515 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef3125586/5bada687dd444f0089b7d217881f06a6/FLAG0b9cdafd6 [2023-12-18 18:29:25,525 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef3125586/5bada687dd444f0089b7d217881f06a6 [2023-12-18 18:29:25,527 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-18 18:29:25,528 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-18 18:29:25,528 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-18 18:29:25,529 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-18 18:29:25,532 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-18 18:29:25,532 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 06:29:25" (1/1) ... [2023-12-18 18:29:25,533 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8d10ff5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:29:25, skipping insertion in model container [2023-12-18 18:29:25,533 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 06:29:25" (1/1) ... [2023-12-18 18:29:25,554 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-18 18:29:25,675 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-tiling/nr4.c[394,407] [2023-12-18 18:29:25,691 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-18 18:29:25,698 INFO L202 MainTranslator]: Completed pre-run [2023-12-18 18:29:25,706 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-tiling/nr4.c[394,407] [2023-12-18 18:29:25,711 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-18 18:29:25,719 INFO L206 MainTranslator]: Completed translation [2023-12-18 18:29:25,720 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:29:25 WrapperNode [2023-12-18 18:29:25,720 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-18 18:29:25,721 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-18 18:29:25,721 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-18 18:29:25,721 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-18 18:29:25,725 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:29:25" (1/1) ... [2023-12-18 18:29:25,729 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:29:25" (1/1) ... [2023-12-18 18:29:25,741 INFO L138 Inliner]: procedures = 15, calls = 22, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 80 [2023-12-18 18:29:25,741 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-18 18:29:25,742 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-18 18:29:25,742 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-18 18:29:25,742 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-18 18:29:25,749 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:29:25" (1/1) ... [2023-12-18 18:29:25,749 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:29:25" (1/1) ... [2023-12-18 18:29:25,750 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:29:25" (1/1) ... [2023-12-18 18:29:25,757 INFO L175 MemorySlicer]: Split 12 memory accesses to 3 slices as follows [2, 6, 4]. 50 percent of accesses are in the largest equivalence class. The 8 initializations are split as follows [2, 6, 0]. The 2 writes are split as follows [0, 0, 2]. [2023-12-18 18:29:25,758 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:29:25" (1/1) ... [2023-12-18 18:29:25,758 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:29:25" (1/1) ... [2023-12-18 18:29:25,761 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:29:25" (1/1) ... [2023-12-18 18:29:25,763 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:29:25" (1/1) ... [2023-12-18 18:29:25,764 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:29:25" (1/1) ... [2023-12-18 18:29:25,764 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:29:25" (1/1) ... [2023-12-18 18:29:25,765 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-18 18:29:25,766 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-18 18:29:25,766 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-18 18:29:25,766 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-18 18:29:25,767 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:29:25" (1/1) ... [2023-12-18 18:29:25,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-18 18:29:25,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:29:25,786 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 18:29:25,836 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 18:29:25,841 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-18 18:29:25,841 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-18 18:29:25,841 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-12-18 18:29:25,842 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-12-18 18:29:25,842 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-18 18:29:25,842 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-12-18 18:29:25,843 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-12-18 18:29:25,843 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-12-18 18:29:25,843 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-18 18:29:25,843 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-18 18:29:25,844 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-12-18 18:29:25,844 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-12-18 18:29:25,844 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-12-18 18:29:25,844 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-18 18:29:25,919 INFO L241 CfgBuilder]: Building ICFG [2023-12-18 18:29:25,921 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-18 18:29:26,101 INFO L282 CfgBuilder]: Performing block encoding [2023-12-18 18:29:26,116 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-18 18:29:26,116 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-12-18 18:29:26,116 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 06:29:26 BoogieIcfgContainer [2023-12-18 18:29:26,116 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-18 18:29:26,118 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-18 18:29:26,118 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-18 18:29:26,123 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-18 18:29:26,123 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.12 06:29:25" (1/3) ... [2023-12-18 18:29:26,123 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ddb9f92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 06:29:26, skipping insertion in model container [2023-12-18 18:29:26,124 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:29:25" (2/3) ... [2023-12-18 18:29:26,124 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ddb9f92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 06:29:26, skipping insertion in model container [2023-12-18 18:29:26,125 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 06:29:26" (3/3) ... [2023-12-18 18:29:26,126 INFO L112 eAbstractionObserver]: Analyzing ICFG nr4.c [2023-12-18 18:29:26,144 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-18 18:29:26,144 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-18 18:29:26,190 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-18 18:29:26,195 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;@6f6f847c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-18 18:29:26,195 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-18 18:29:26,198 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 20 states have (on average 1.65) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 18:29:26,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-12-18 18:29:26,215 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:29:26,215 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:29:26,215 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:29:26,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:29:26,219 INFO L85 PathProgramCache]: Analyzing trace with hash -2106680282, now seen corresponding path program 1 times [2023-12-18 18:29:26,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:29:26,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684160626] [2023-12-18 18:29:26,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:29:26,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:29:26,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:29:26,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:29:26,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:29:26,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684160626] [2023-12-18 18:29:26,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684160626] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-18 18:29:26,359 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-18 18:29:26,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-18 18:29:26,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838012553] [2023-12-18 18:29:26,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-18 18:29:26,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-18 18:29:26,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:29:26,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-18 18:29:26,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-18 18:29:26,385 INFO L87 Difference]: Start difference. First operand has 22 states, 20 states have (on average 1.65) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 18:29:26,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:29:26,400 INFO L93 Difference]: Finished difference Result 40 states and 59 transitions. [2023-12-18 18:29:26,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-18 18:29:26,402 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-12-18 18:29:26,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:29:26,409 INFO L225 Difference]: With dead ends: 40 [2023-12-18 18:29:26,409 INFO L226 Difference]: Without dead ends: 18 [2023-12-18 18:29:26,411 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-18 18:29:26,414 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 18:29:26,415 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 25 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 18:29:26,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2023-12-18 18:29:26,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2023-12-18 18:29:26,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 18:29:26,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2023-12-18 18:29:26,437 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 12 [2023-12-18 18:29:26,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:29:26,437 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2023-12-18 18:29:26,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 18:29:26,437 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2023-12-18 18:29:26,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-12-18 18:29:26,438 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:29:26,438 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:29:26,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-18 18:29:26,439 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:29:26,440 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:29:26,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1426621912, now seen corresponding path program 1 times [2023-12-18 18:29:26,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:29:26,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645946753] [2023-12-18 18:29:26,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:29:26,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:29:26,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:29:26,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:29:26,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:29:26,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645946753] [2023-12-18 18:29:26,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645946753] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-18 18:29:26,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-18 18:29:26,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-18 18:29:26,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086683217] [2023-12-18 18:29:26,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-18 18:29:26,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-18 18:29:26,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:29:26,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-18 18:29:26,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-18 18:29:26,656 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 18:29:26,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:29:26,690 INFO L93 Difference]: Finished difference Result 23 states and 27 transitions. [2023-12-18 18:29:26,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-18 18:29:26,690 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-12-18 18:29:26,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:29:26,691 INFO L225 Difference]: With dead ends: 23 [2023-12-18 18:29:26,691 INFO L226 Difference]: Without dead ends: 21 [2023-12-18 18:29:26,691 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-18 18:29:26,692 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 3 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 18:29:26,693 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 51 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 18:29:26,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-12-18 18:29:26,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2023-12-18 18:29:26,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 18:29:26,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2023-12-18 18:29:26,701 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 12 [2023-12-18 18:29:26,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:29:26,702 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2023-12-18 18:29:26,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 18:29:26,702 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2023-12-18 18:29:26,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-12-18 18:29:26,703 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:29:26,703 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:29:26,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-18 18:29:26,703 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:29:26,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:29:26,704 INFO L85 PathProgramCache]: Analyzing trace with hash -1426562330, now seen corresponding path program 1 times [2023-12-18 18:29:26,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:29:26,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786134286] [2023-12-18 18:29:26,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:29:26,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:29:26,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:29:26,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:29:26,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:29:26,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786134286] [2023-12-18 18:29:26,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786134286] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-18 18:29:26,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-18 18:29:26,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-18 18:29:26,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107252819] [2023-12-18 18:29:26,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-18 18:29:26,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-18 18:29:26,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:29:26,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-18 18:29:26,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-12-18 18:29:26,932 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 18:29:26,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:29:26,967 INFO L93 Difference]: Finished difference Result 35 states and 43 transitions. [2023-12-18 18:29:26,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-18 18:29:26,968 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-12-18 18:29:26,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:29:26,970 INFO L225 Difference]: With dead ends: 35 [2023-12-18 18:29:26,972 INFO L226 Difference]: Without dead ends: 25 [2023-12-18 18:29:26,973 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-12-18 18:29:26,977 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 54 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 18:29:26,977 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 22 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 18:29:26,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-12-18 18:29:26,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 21. [2023-12-18 18:29:26,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 18:29:26,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2023-12-18 18:29:26,981 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 12 [2023-12-18 18:29:26,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:29:26,982 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2023-12-18 18:29:26,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 18:29:26,982 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2023-12-18 18:29:26,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-12-18 18:29:26,982 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:29:26,982 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:29:26,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-18 18:29:26,983 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:29:26,983 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:29:26,983 INFO L85 PathProgramCache]: Analyzing trace with hash 1008841274, now seen corresponding path program 1 times [2023-12-18 18:29:26,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:29:26,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335479563] [2023-12-18 18:29:26,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:29:26,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:29:27,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:29:27,048 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:29:27,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:29:27,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335479563] [2023-12-18 18:29:27,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335479563] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-18 18:29:27,049 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-18 18:29:27,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-18 18:29:27,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201084592] [2023-12-18 18:29:27,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-18 18:29:27,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-18 18:29:27,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:29:27,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-18 18:29:27,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-18 18:29:27,050 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 18:29:27,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:29:27,080 INFO L93 Difference]: Finished difference Result 39 states and 49 transitions. [2023-12-18 18:29:27,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-18 18:29:27,081 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-12-18 18:29:27,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:29:27,081 INFO L225 Difference]: With dead ends: 39 [2023-12-18 18:29:27,081 INFO L226 Difference]: Without dead ends: 24 [2023-12-18 18:29:27,084 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-18 18:29:27,089 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 3 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 18:29:27,090 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 29 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 18:29:27,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-12-18 18:29:27,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2023-12-18 18:29:27,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 18:29:27,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2023-12-18 18:29:27,099 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 15 [2023-12-18 18:29:27,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:29:27,100 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2023-12-18 18:29:27,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 18:29:27,100 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2023-12-18 18:29:27,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-12-18 18:29:27,100 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:29:27,101 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:29:27,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-18 18:29:27,101 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:29:27,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:29:27,101 INFO L85 PathProgramCache]: Analyzing trace with hash -1963751443, now seen corresponding path program 1 times [2023-12-18 18:29:27,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:29:27,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962577321] [2023-12-18 18:29:27,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:29:27,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:29:27,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:29:27,164 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:29:27,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:29:27,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962577321] [2023-12-18 18:29:27,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962577321] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:29:27,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857288269] [2023-12-18 18:29:27,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:29:27,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:29:27,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:29:27,168 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 18:29:27,216 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 18:29:27,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:29:27,239 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-18 18:29:27,242 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:29:27,266 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:29:27,266 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 18:29:27,282 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:29:27,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857288269] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 18:29:27,282 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 18:29:27,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-12-18 18:29:27,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534102194] [2023-12-18 18:29:27,282 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 18:29:27,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-18 18:29:27,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:29:27,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-18 18:29:27,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-12-18 18:29:27,284 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 18:29:27,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:29:27,311 INFO L93 Difference]: Finished difference Result 47 states and 61 transitions. [2023-12-18 18:29:27,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-18 18:29:27,311 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-12-18 18:29:27,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:29:27,312 INFO L225 Difference]: With dead ends: 47 [2023-12-18 18:29:27,312 INFO L226 Difference]: Without dead ends: 31 [2023-12-18 18:29:27,312 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-12-18 18:29:27,312 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 11 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 18:29:27,313 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 42 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 18:29:27,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-12-18 18:29:27,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2023-12-18 18:29:27,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 30 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 18:29:27,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2023-12-18 18:29:27,317 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 18 [2023-12-18 18:29:27,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:29:27,317 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2023-12-18 18:29:27,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 18:29:27,318 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2023-12-18 18:29:27,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-12-18 18:29:27,318 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:29:27,318 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:29:27,326 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 18:29:27,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:29:27,524 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:29:27,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:29:27,524 INFO L85 PathProgramCache]: Analyzing trace with hash 1355307130, now seen corresponding path program 2 times [2023-12-18 18:29:27,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:29:27,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554551076] [2023-12-18 18:29:27,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:29:27,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:29:27,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:29:27,642 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 15 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:29:27,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:29:27,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554551076] [2023-12-18 18:29:27,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554551076] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:29:27,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061758624] [2023-12-18 18:29:27,644 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-18 18:29:27,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:29:27,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:29:27,664 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 18:29:27,665 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 18:29:27,715 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-18 18:29:27,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 18:29:27,716 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-18 18:29:27,717 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:29:27,798 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:29:27,798 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-18 18:29:27,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061758624] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-18 18:29:27,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-18 18:29:27,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2023-12-18 18:29:27,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905770028] [2023-12-18 18:29:27,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-18 18:29:27,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-18 18:29:27,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:29:27,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-18 18:29:27,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2023-12-18 18:29:27,801 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 18:29:27,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:29:27,841 INFO L93 Difference]: Finished difference Result 56 states and 70 transitions. [2023-12-18 18:29:27,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-18 18:29:27,841 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-12-18 18:29:27,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:29:27,842 INFO L225 Difference]: With dead ends: 56 [2023-12-18 18:29:27,842 INFO L226 Difference]: Without dead ends: 31 [2023-12-18 18:29:27,843 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2023-12-18 18:29:27,843 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 16 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 18:29:27,844 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 24 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 18:29:27,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-12-18 18:29:27,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2023-12-18 18:29:27,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 30 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 18:29:27,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2023-12-18 18:29:27,851 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 27 [2023-12-18 18:29:27,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:29:27,851 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2023-12-18 18:29:27,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 18:29:27,852 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2023-12-18 18:29:27,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-12-18 18:29:27,853 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:29:27,853 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:29:27,860 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 18:29:28,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-12-18 18:29:28,058 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:29:28,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:29:28,058 INFO L85 PathProgramCache]: Analyzing trace with hash 2056371708, now seen corresponding path program 1 times [2023-12-18 18:29:28,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:29:28,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498499993] [2023-12-18 18:29:28,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:29:28,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:29:28,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:29:28,692 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:29:28,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:29:28,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498499993] [2023-12-18 18:29:28,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498499993] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:29:28,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643108367] [2023-12-18 18:29:28,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:29:28,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:29:28,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:29:28,693 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 18:29:28,708 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 18:29:28,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:29:28,748 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 43 conjunts are in the unsatisfiable core [2023-12-18 18:29:28,750 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:29:28,865 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 18:29:28,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 18:29:28,941 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 31 treesize of output 11 [2023-12-18 18:29:28,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 18:29:28,997 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 31 treesize of output 11 [2023-12-18 18:29:29,044 INFO L349 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2023-12-18 18:29:29,044 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 26 [2023-12-18 18:29:29,256 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:29:29,256 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 18:29:54,380 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 73 [2023-12-18 18:29:54,396 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 2307 treesize of output 2275 [2023-12-18 18:29:57,121 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-18 18:29:57,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643108367] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 18:29:57,121 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 18:29:57,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 41 [2023-12-18 18:29:57,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890666316] [2023-12-18 18:29:57,121 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 18:29:57,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-12-18 18:29:57,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:29:57,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-12-18 18:29:57,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=1383, Unknown=5, NotChecked=0, Total=1640 [2023-12-18 18:29:57,123 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand has 41 states, 41 states have (on average 1.8048780487804879) internal successors, (74), 41 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 18:29:58,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:29:58,640 INFO L93 Difference]: Finished difference Result 158 states and 191 transitions. [2023-12-18 18:29:58,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-12-18 18:29:58,640 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.8048780487804879) internal successors, (74), 41 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-12-18 18:29:58,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:29:58,642 INFO L225 Difference]: With dead ends: 158 [2023-12-18 18:29:58,642 INFO L226 Difference]: Without dead ends: 133 [2023-12-18 18:29:58,644 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1861 ImplicationChecksByTransitivity, 29.1s TimeCoverageRelationStatistics Valid=1208, Invalid=5593, Unknown=5, NotChecked=0, Total=6806 [2023-12-18 18:29:58,644 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 448 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 549 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 448 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-18 18:29:58,644 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [448 Valid, 81 Invalid, 594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 549 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-18 18:29:58,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2023-12-18 18:29:58,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 51. [2023-12-18 18:29:58,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.24) internal successors, (62), 50 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 18:29:58,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 62 transitions. [2023-12-18 18:29:58,656 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 62 transitions. Word has length 27 [2023-12-18 18:29:58,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:29:58,657 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 62 transitions. [2023-12-18 18:29:58,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.8048780487804879) internal successors, (74), 41 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 18:29:58,657 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 62 transitions. [2023-12-18 18:29:58,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-12-18 18:29:58,658 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:29:58,658 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:29:58,665 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-18 18:29:58,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:29:58,864 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:29:58,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:29:58,865 INFO L85 PathProgramCache]: Analyzing trace with hash -1325432210, now seen corresponding path program 1 times [2023-12-18 18:29:58,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:29:58,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397304479] [2023-12-18 18:29:58,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:29:58,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:29:58,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:29:59,465 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:29:59,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:29:59,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397304479] [2023-12-18 18:29:59,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397304479] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:29:59,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998450318] [2023-12-18 18:29:59,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:29:59,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:29:59,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:29:59,468 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 18:29:59,476 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-18 18:29:59,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:29:59,538 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 42 conjunts are in the unsatisfiable core [2023-12-18 18:29:59,543 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:29:59,641 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 18:29:59,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 18:29:59,702 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 31 treesize of output 11 [2023-12-18 18:29:59,744 INFO L349 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2023-12-18 18:29:59,744 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 26 [2023-12-18 18:30:00,090 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:30:00,090 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 18:30:00,450 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 57 [2023-12-18 18:30:00,455 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 147 treesize of output 139 [2023-12-18 18:30:00,587 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-18 18:30:00,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998450318] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 18:30:00,587 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 18:30:00,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 16] total 43 [2023-12-18 18:30:00,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346801256] [2023-12-18 18:30:00,588 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 18:30:00,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-12-18 18:30:00,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:30:00,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-12-18 18:30:00,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=1562, Unknown=0, NotChecked=0, Total=1806 [2023-12-18 18:30:00,589 INFO L87 Difference]: Start difference. First operand 51 states and 62 transitions. Second operand has 43 states, 43 states have (on average 2.0697674418604652) internal successors, (89), 43 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 18:30:03,281 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 (select |c_#memory_int#2| |c_ULTIMATE.start_main_~#volArray~0#1.base|))) (let ((.cse4 (select .cse1 4))) (let ((.cse2 (* |c_ULTIMATE.start_main_~i~0#1| 4)) (.cse5 (<= 3 .cse4))) (and (let ((.cse0 (select .cse1 (+ .cse2 |c_ULTIMATE.start_main_~#volArray~0#1.offset|)))) (or (< |c_ULTIMATE.start_main_~MINVAL~0#1| (+ .cse0 1)) (= .cse0 0))) (= |c_ULTIMATE.start_main_~#volArray~0#1.offset| 0) (forall ((|v_ULTIMATE.start_main_~j~0#1_34| Int)) (or (< |c_ULTIMATE.start_main_~j~0#1| (+ |v_ULTIMATE.start_main_~j~0#1_34| 1)) (forall ((v_ArrVal_88 Int)) (let ((.cse3 (select (store .cse1 (+ (* 16 |c_ULTIMATE.start_main_~i~0#1|) |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* |v_ULTIMATE.start_main_~j~0#1_34| (- 4))) v_ArrVal_88) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 4)))) (or (= .cse3 0) (< |c_ULTIMATE.start_main_~MINVAL~0#1| (+ .cse3 1))))))) (= 2 |c_ULTIMATE.start_main_~MINVAL~0#1|) (not (= (+ |c_ULTIMATE.start_main_~j~0#1| 1) .cse2)) (<= |c_ULTIMATE.start_main_~MINVAL~0#1| 2) (or (= .cse4 0) (and (exists ((|ULTIMATE.start_main_~j~0#1| Int)) (= (select .cse1 (+ 16 (* |ULTIMATE.start_main_~j~0#1| (- 4)))) 0)) .cse5)) .cse5)))) is different from false [2023-12-18 18:30:03,777 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 (select |c_#memory_int#2| |c_ULTIMATE.start_main_~#volArray~0#1.base|))) (let ((.cse2 (select .cse1 4))) (let ((.cse3 (<= 3 .cse2))) (and (= |c_ULTIMATE.start_main_~#volArray~0#1.offset| 0) (forall ((|v_ULTIMATE.start_main_~j~0#1_34| Int)) (or (< |c_ULTIMATE.start_main_~j~0#1| (+ |v_ULTIMATE.start_main_~j~0#1_34| 1)) (forall ((v_ArrVal_88 Int)) (let ((.cse0 (select (store .cse1 (+ (* 16 |c_ULTIMATE.start_main_~i~0#1|) |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* |v_ULTIMATE.start_main_~j~0#1_34| (- 4))) v_ArrVal_88) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 4)))) (or (= .cse0 0) (< |c_ULTIMATE.start_main_~MINVAL~0#1| (+ .cse0 1))))))) (= 2 |c_ULTIMATE.start_main_~MINVAL~0#1|) (not (= (+ |c_ULTIMATE.start_main_~j~0#1| 1) (* |c_ULTIMATE.start_main_~i~0#1| 4))) (<= |c_ULTIMATE.start_main_~MINVAL~0#1| 2) (or (= .cse2 0) (and (exists ((|ULTIMATE.start_main_~j~0#1| Int)) (= (select .cse1 (+ 16 (* |ULTIMATE.start_main_~j~0#1| (- 4)))) 0)) .cse3)) .cse3)))) is different from false [2023-12-18 18:30:04,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:30:04,295 INFO L93 Difference]: Finished difference Result 122 states and 148 transitions. [2023-12-18 18:30:04,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-12-18 18:30:04,295 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.0697674418604652) internal successors, (89), 43 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2023-12-18 18:30:04,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:30:04,296 INFO L225 Difference]: With dead ends: 122 [2023-12-18 18:30:04,296 INFO L226 Difference]: Without dead ends: 82 [2023-12-18 18:30:04,297 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1224 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=590, Invalid=3198, Unknown=2, NotChecked=242, Total=4032 [2023-12-18 18:30:04,297 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 124 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 655 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 859 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 655 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 162 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-18 18:30:04,297 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 167 Invalid, 859 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 655 Invalid, 0 Unknown, 162 Unchecked, 0.3s Time] [2023-12-18 18:30:04,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2023-12-18 18:30:04,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 54. [2023-12-18 18:30:04,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.2075471698113207) internal successors, (64), 53 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 18:30:04,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 64 transitions. [2023-12-18 18:30:04,304 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 64 transitions. Word has length 32 [2023-12-18 18:30:04,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:30:04,304 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 64 transitions. [2023-12-18 18:30:04,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.0697674418604652) internal successors, (89), 43 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 18:30:04,305 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 64 transitions. [2023-12-18 18:30:04,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-12-18 18:30:04,305 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:30:04,305 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:30:04,316 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-18 18:30:04,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:30:04,510 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:30:04,511 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:30:04,511 INFO L85 PathProgramCache]: Analyzing trace with hash -1357597380, now seen corresponding path program 2 times [2023-12-18 18:30:04,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:30:04,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341864264] [2023-12-18 18:30:04,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:30:04,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:30:04,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:30:04,841 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 7 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:30:04,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:30:04,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341864264] [2023-12-18 18:30:04,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341864264] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:30:04,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701100272] [2023-12-18 18:30:04,841 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-18 18:30:04,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:30:04,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:30:04,842 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 18:30:04,863 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 18:30:04,896 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-18 18:30:04,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 18:30:04,897 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 26 conjunts are in the unsatisfiable core [2023-12-18 18:30:04,901 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:30:05,026 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 15 treesize of output 1 [2023-12-18 18:30:05,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 18:30:05,084 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 31 treesize of output 11 [2023-12-18 18:30:05,239 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-12-18 18:30:05,249 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:30:05,249 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 18:30:11,431 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 29 [2023-12-18 18:30:11,434 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 174 treesize of output 166 [2023-12-18 18:30:11,580 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:30:11,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701100272] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 18:30:11,581 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 18:30:11,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 36 [2023-12-18 18:30:11,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856031615] [2023-12-18 18:30:11,581 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 18:30:11,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-12-18 18:30:11,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:30:11,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-12-18 18:30:11,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=1066, Unknown=2, NotChecked=0, Total=1260 [2023-12-18 18:30:11,583 INFO L87 Difference]: Start difference. First operand 54 states and 64 transitions. Second operand has 36 states, 36 states have (on average 2.7777777777777777) internal successors, (100), 36 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 18:30:26,828 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-18 18:30:29,728 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.90s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-18 18:30:29,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:30:29,867 INFO L93 Difference]: Finished difference Result 161 states and 193 transitions. [2023-12-18 18:30:29,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-12-18 18:30:29,868 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.7777777777777777) internal successors, (100), 36 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2023-12-18 18:30:29,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:30:29,868 INFO L225 Difference]: With dead ends: 161 [2023-12-18 18:30:29,868 INFO L226 Difference]: Without dead ends: 121 [2023-12-18 18:30:29,870 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 871 ImplicationChecksByTransitivity, 15.8s TimeCoverageRelationStatistics Valid=485, Invalid=2592, Unknown=3, NotChecked=0, Total=3080 [2023-12-18 18:30:29,870 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 194 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 565 mSolverCounterSat, 45 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 565 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.9s IncrementalHoareTripleChecker+Time [2023-12-18 18:30:29,870 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [194 Valid, 191 Invalid, 617 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 565 Invalid, 7 Unknown, 0 Unchecked, 8.9s Time] [2023-12-18 18:30:29,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2023-12-18 18:30:29,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 86. [2023-12-18 18:30:29,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.223529411764706) internal successors, (104), 85 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 18:30:29,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 104 transitions. [2023-12-18 18:30:29,886 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 104 transitions. Word has length 37 [2023-12-18 18:30:29,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:30:29,886 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 104 transitions. [2023-12-18 18:30:29,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.7777777777777777) internal successors, (100), 36 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 18:30:29,886 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 104 transitions. [2023-12-18 18:30:29,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-12-18 18:30:29,887 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:30:29,887 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:30:29,893 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 18:30:30,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:30:30,088 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:30:30,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:30:30,088 INFO L85 PathProgramCache]: Analyzing trace with hash -403369170, now seen corresponding path program 3 times [2023-12-18 18:30:30,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:30:30,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814319967] [2023-12-18 18:30:30,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:30:30,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:30:30,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:30:30,419 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-18 18:30:30,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:30:30,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814319967] [2023-12-18 18:30:30,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814319967] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:30:30,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363125130] [2023-12-18 18:30:30,420 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-18 18:30:30,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:30:30,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:30:30,421 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 18:30:30,432 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 18:30:30,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-12-18 18:30:30,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 18:30:30,492 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 28 conjunts are in the unsatisfiable core [2023-12-18 18:30:30,493 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:30:30,522 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 16 treesize of output 12 [2023-12-18 18:30:30,724 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 3 proven. 35 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-18 18:30:30,724 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 18:30:30,838 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2023-12-18 18:30:30,841 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2023-12-18 18:30:30,869 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-18 18:30:30,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363125130] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 18:30:30,869 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 18:30:30,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 31 [2023-12-18 18:30:30,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287667286] [2023-12-18 18:30:30,869 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 18:30:30,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-12-18 18:30:30,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:30:30,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-12-18 18:30:30,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=780, Unknown=0, NotChecked=0, Total=930 [2023-12-18 18:30:30,871 INFO L87 Difference]: Start difference. First operand 86 states and 104 transitions. Second operand has 31 states, 31 states have (on average 2.967741935483871) internal successors, (92), 31 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 18:30:32,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:30:32,181 INFO L93 Difference]: Finished difference Result 289 states and 343 transitions. [2023-12-18 18:30:32,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2023-12-18 18:30:32,181 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.967741935483871) internal successors, (92), 31 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2023-12-18 18:30:32,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:30:32,182 INFO L225 Difference]: With dead ends: 289 [2023-12-18 18:30:32,182 INFO L226 Difference]: Without dead ends: 234 [2023-12-18 18:30:32,184 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1533 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=889, Invalid=4661, Unknown=0, NotChecked=0, Total=5550 [2023-12-18 18:30:32,184 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 250 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-18 18:30:32,184 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [250 Valid, 240 Invalid, 605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 560 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-18 18:30:32,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2023-12-18 18:30:32,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 141. [2023-12-18 18:30:32,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 1.2285714285714286) internal successors, (172), 140 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 18:30:32,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 172 transitions. [2023-12-18 18:30:32,213 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 172 transitions. Word has length 42 [2023-12-18 18:30:32,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:30:32,215 INFO L495 AbstractCegarLoop]: Abstraction has 141 states and 172 transitions. [2023-12-18 18:30:32,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.967741935483871) internal successors, (92), 31 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 18:30:32,215 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 172 transitions. [2023-12-18 18:30:32,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-12-18 18:30:32,221 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:30:32,221 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:30:32,235 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 18:30:32,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:30:32,426 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:30:32,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:30:32,427 INFO L85 PathProgramCache]: Analyzing trace with hash -1967416196, now seen corresponding path program 4 times [2023-12-18 18:30:32,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:30:32,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895648489] [2023-12-18 18:30:32,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:30:32,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:30:32,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:30:32,708 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 30 proven. 17 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-18 18:30:32,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:30:32,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895648489] [2023-12-18 18:30:32,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895648489] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:30:32,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475110802] [2023-12-18 18:30:32,709 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-18 18:30:32,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:30:32,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:30:32,726 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 18:30:32,756 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 18:30:32,772 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-18 18:30:32,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 18:30:32,773 INFO L262 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-18 18:30:32,776 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:30:33,109 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 46 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-18 18:30:33,109 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 18:30:33,277 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 46 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-18 18:30:33,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475110802] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 18:30:33,277 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 18:30:33,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 30 [2023-12-18 18:30:33,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628291832] [2023-12-18 18:30:33,277 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 18:30:33,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-12-18 18:30:33,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:30:33,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-12-18 18:30:33,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=663, Unknown=0, NotChecked=0, Total=870 [2023-12-18 18:30:33,279 INFO L87 Difference]: Start difference. First operand 141 states and 172 transitions. Second operand has 30 states, 30 states have (on average 3.533333333333333) internal successors, (106), 30 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 18:30:33,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:30:33,549 INFO L93 Difference]: Finished difference Result 173 states and 208 transitions. [2023-12-18 18:30:33,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-18 18:30:33,549 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.533333333333333) internal successors, (106), 30 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2023-12-18 18:30:33,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:30:33,550 INFO L225 Difference]: With dead ends: 173 [2023-12-18 18:30:33,550 INFO L226 Difference]: Without dead ends: 142 [2023-12-18 18:30:33,550 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=384, Invalid=1176, Unknown=0, NotChecked=0, Total=1560 [2023-12-18 18:30:33,551 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 196 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 18:30:33,551 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [196 Valid, 213 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 18:30:33,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2023-12-18 18:30:33,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 128. [2023-12-18 18:30:33,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 1.236220472440945) internal successors, (157), 127 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 18:30:33,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 157 transitions. [2023-12-18 18:30:33,576 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 157 transitions. Word has length 47 [2023-12-18 18:30:33,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:30:33,576 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 157 transitions. [2023-12-18 18:30:33,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.533333333333333) internal successors, (106), 30 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 18:30:33,577 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 157 transitions. [2023-12-18 18:30:33,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-12-18 18:30:33,577 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:30:33,577 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 6, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:30:33,584 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-12-18 18:30:33,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:30:33,787 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:30:33,787 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:30:33,787 INFO L85 PathProgramCache]: Analyzing trace with hash 780301956, now seen corresponding path program 5 times [2023-12-18 18:30:33,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:30:33,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466078422] [2023-12-18 18:30:33,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:30:33,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:30:33,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:30:34,743 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 3 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:30:34,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:30:34,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466078422] [2023-12-18 18:30:34,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466078422] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:30:34,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556311100] [2023-12-18 18:30:34,743 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-18 18:30:34,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:30:34,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:30:34,756 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 18:30:34,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-18 18:30:34,854 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2023-12-18 18:30:34,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 18:30:34,856 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 36 conjunts are in the unsatisfiable core [2023-12-18 18:30:34,864 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:30:34,911 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 25 treesize of output 1 [2023-12-18 18:30:34,982 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2023-12-18 18:30:35,091 INFO L349 Elim1Store]: treesize reduction 35, result has 25.5 percent of original size [2023-12-18 18:30:35,091 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 18 [2023-12-18 18:30:35,223 INFO L349 Elim1Store]: treesize reduction 38, result has 19.1 percent of original size [2023-12-18 18:30:35,223 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 13 [2023-12-18 18:30:35,295 INFO L349 Elim1Store]: treesize reduction 38, result has 19.1 percent of original size [2023-12-18 18:30:35,295 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 13 [2023-12-18 18:30:35,346 INFO L349 Elim1Store]: treesize reduction 38, result has 19.1 percent of original size [2023-12-18 18:30:35,346 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 13 [2023-12-18 18:30:35,403 INFO L349 Elim1Store]: treesize reduction 38, result has 19.1 percent of original size [2023-12-18 18:30:35,404 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 13 [2023-12-18 18:30:35,492 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2023-12-18 18:30:35,494 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 30 proven. 77 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-18 18:30:35,494 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 18:31:57,867 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_203 Int) (v_ArrVal_201 Int) (v_ArrVal_199 Int) (|v_ULTIMATE.start_main_~j~0#1_64| Int) (|v_ULTIMATE.start_main_~j~0#1_65| Int) (|v_ULTIMATE.start_main_~j~0#1_66| Int) (v_ArrVal_206 Int)) (or (< |v_ULTIMATE.start_main_~j~0#1_65| (+ |v_ULTIMATE.start_main_~j~0#1_64| 1)) (< |c_ULTIMATE.start_main_~j~0#1| (+ |v_ULTIMATE.start_main_~j~0#1_66| 1)) (< |v_ULTIMATE.start_main_~j~0#1_66| (+ |v_ULTIMATE.start_main_~j~0#1_65| 1)) (< |c_ULTIMATE.start_main_~MINVAL~0#1| (+ (select (let ((.cse0 (* 16 |c_ULTIMATE.start_main_~i~0#1|))) (store (store (store (store (select |c_#memory_int#2| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ .cse0 |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* |c_ULTIMATE.start_main_~j~0#1| (- 4))) v_ArrVal_199) (+ .cse0 (* |v_ULTIMATE.start_main_~j~0#1_66| (- 4)) |c_ULTIMATE.start_main_~#volArray~0#1.offset|) v_ArrVal_201) (+ .cse0 (* |v_ULTIMATE.start_main_~j~0#1_65| (- 4)) |c_ULTIMATE.start_main_~#volArray~0#1.offset|) v_ArrVal_203) (+ (* |v_ULTIMATE.start_main_~j~0#1_64| (- 4)) .cse0 |c_ULTIMATE.start_main_~#volArray~0#1.offset|) v_ArrVal_206)) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 4)) 1)))) is different from false [2023-12-18 18:32:01,905 WARN L854 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~j~0#1_67| Int)) (or (< 4 |v_ULTIMATE.start_main_~j~0#1_67|) (forall ((v_ArrVal_203 Int) (v_ArrVal_201 Int) (v_ArrVal_199 Int) (|v_ULTIMATE.start_main_~j~0#1_64| Int) (|v_ULTIMATE.start_main_~j~0#1_65| Int) (|v_ULTIMATE.start_main_~j~0#1_66| Int) (v_ArrVal_206 Int)) (or (< |v_ULTIMATE.start_main_~j~0#1_67| (+ |v_ULTIMATE.start_main_~j~0#1_66| 1)) (< |v_ULTIMATE.start_main_~j~0#1_65| (+ |v_ULTIMATE.start_main_~j~0#1_64| 1)) (< |v_ULTIMATE.start_main_~j~0#1_66| (+ |v_ULTIMATE.start_main_~j~0#1_65| 1)) (< |c_ULTIMATE.start_main_~MINVAL~0#1| (+ (select (let ((.cse0 (* 16 |c_ULTIMATE.start_main_~i~0#1|))) (store (store (store (store (select |c_#memory_int#2| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ .cse0 (* |v_ULTIMATE.start_main_~j~0#1_67| (- 4)) |c_ULTIMATE.start_main_~#volArray~0#1.offset|) v_ArrVal_199) (+ .cse0 (* |v_ULTIMATE.start_main_~j~0#1_66| (- 4)) |c_ULTIMATE.start_main_~#volArray~0#1.offset|) v_ArrVal_201) (+ .cse0 (* |v_ULTIMATE.start_main_~j~0#1_65| (- 4)) |c_ULTIMATE.start_main_~#volArray~0#1.offset|) v_ArrVal_203) (+ (* |v_ULTIMATE.start_main_~j~0#1_64| (- 4)) .cse0 |c_ULTIMATE.start_main_~#volArray~0#1.offset|) v_ArrVal_206)) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 4)) 1)))))) is different from false [2023-12-18 18:33:20,119 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 80 [2023-12-18 18:33:20,232 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12362448878 treesize of output 12345671662 [2023-12-18 18:33:22,346 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 7 proven. 78 refuted. 4 times theorem prover too weak. 2 trivial. 18 not checked. [2023-12-18 18:33:22,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556311100] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 18:33:22,347 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 18:33:22,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 17, 21] total 55 [2023-12-18 18:33:22,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343909868] [2023-12-18 18:33:22,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 18:33:22,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2023-12-18 18:33:22,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:33:22,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2023-12-18 18:33:22,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=367, Invalid=2359, Unknown=38, NotChecked=206, Total=2970 [2023-12-18 18:33:22,349 INFO L87 Difference]: Start difference. First operand 128 states and 157 transitions. Second operand has 55 states, 55 states have (on average 2.3454545454545452) internal successors, (129), 55 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 18:33:25,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:33:25,387 INFO L93 Difference]: Finished difference Result 198 states and 241 transitions. [2023-12-18 18:33:25,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-12-18 18:33:25,387 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.3454545454545452) internal successors, (129), 55 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2023-12-18 18:33:25,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:33:25,388 INFO L225 Difference]: With dead ends: 198 [2023-12-18 18:33:25,388 INFO L226 Difference]: Without dead ends: 99 [2023-12-18 18:33:25,389 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 66 SyntacticMatches, 4 SemanticMatches, 80 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 2028 ImplicationChecksByTransitivity, 166.3s TimeCoverageRelationStatistics Valid=1175, Invalid=5114, Unknown=39, NotChecked=314, Total=6642 [2023-12-18 18:33:25,390 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 273 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 901 mSolverCounterSat, 140 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 1199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 901 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 157 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-12-18 18:33:25,390 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [273 Valid, 122 Invalid, 1199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 901 Invalid, 1 Unknown, 157 Unchecked, 1.4s Time] [2023-12-18 18:33:25,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2023-12-18 18:33:25,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 82. [2023-12-18 18:33:25,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.1604938271604939) internal successors, (94), 81 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 18:33:25,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 94 transitions. [2023-12-18 18:33:25,407 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 94 transitions. Word has length 47 [2023-12-18 18:33:25,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:33:25,407 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 94 transitions. [2023-12-18 18:33:25,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.3454545454545452) internal successors, (129), 55 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 18:33:25,407 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 94 transitions. [2023-12-18 18:33:25,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-12-18 18:33:25,422 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:33:25,423 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 6, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:33:25,427 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-12-18 18:33:25,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-12-18 18:33:25,623 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:33:25,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:33:25,623 INFO L85 PathProgramCache]: Analyzing trace with hash -1325505596, now seen corresponding path program 6 times [2023-12-18 18:33:25,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:33:25,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750316673] [2023-12-18 18:33:25,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:33:25,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:33:25,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:33:26,222 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 1 proven. 121 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-18 18:33:26,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:33:26,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750316673] [2023-12-18 18:33:26,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750316673] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:33:26,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708430869] [2023-12-18 18:33:26,223 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-18 18:33:26,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:33:26,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:33:26,233 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 18:33:26,235 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 18:33:26,328 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2023-12-18 18:33:26,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 18:33:26,329 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 44 conjunts are in the unsatisfiable core [2023-12-18 18:33:26,332 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:33:26,423 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-12-18 18:33:26,496 INFO L349 Elim1Store]: treesize reduction 38, result has 19.1 percent of original size [2023-12-18 18:33:26,496 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 13 [2023-12-18 18:33:26,532 INFO L349 Elim1Store]: treesize reduction 38, result has 19.1 percent of original size [2023-12-18 18:33:26,532 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 13 [2023-12-18 18:33:26,551 INFO L349 Elim1Store]: treesize reduction 30, result has 36.2 percent of original size [2023-12-18 18:33:26,551 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 21 [2023-12-18 18:33:26,605 INFO L349 Elim1Store]: treesize reduction 30, result has 36.2 percent of original size [2023-12-18 18:33:26,605 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 29 [2023-12-18 18:33:26,767 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 10 proven. 115 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-18 18:33:26,767 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 18:33:29,499 WARN L854 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~j~0#1| Int) (|v_ULTIMATE.start_main_~j~0#1_79| Int) (v_ArrVal_251 Int) (v_ArrVal_250 Int)) (or (< 1 |v_ULTIMATE.start_main_~j~0#1_79|) (= (select (let ((.cse0 (* 16 |c_ULTIMATE.start_main_~i~0#1|))) (store (store (select |c_#memory_int#2| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ .cse0 (* |ULTIMATE.start_main_~j~0#1| (- 4)) |c_ULTIMATE.start_main_~#volArray~0#1.offset|) v_ArrVal_250) (+ .cse0 (* |v_ULTIMATE.start_main_~j~0#1_79| (- 4)) |c_ULTIMATE.start_main_~#volArray~0#1.offset|) v_ArrVal_251)) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 12)) 0) (< (+ |v_ULTIMATE.start_main_~j~0#1_79| 1) |ULTIMATE.start_main_~j~0#1|))) is different from false [2023-12-18 18:34:09,368 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_245 Int) (|v_ULTIMATE.start_main_~j~0#1_81| Int) (|v_ULTIMATE.start_main_~j~0#1_79| Int) (v_ArrVal_251 Int) (v_ArrVal_250 Int) (|v_ULTIMATE.start_main_~j~0#1_82| Int) (v_ArrVal_248 Int)) (or (< 1 |v_ULTIMATE.start_main_~j~0#1_79|) (= (select (let ((.cse0 (* 16 |c_ULTIMATE.start_main_~i~0#1|))) (store (store (store (store (select |c_#memory_int#2| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ .cse0 |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* |c_ULTIMATE.start_main_~j~0#1| (- 4))) v_ArrVal_245) (+ .cse0 (* |v_ULTIMATE.start_main_~j~0#1_82| (- 4)) |c_ULTIMATE.start_main_~#volArray~0#1.offset|) v_ArrVal_248) (+ .cse0 |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* |v_ULTIMATE.start_main_~j~0#1_81| (- 4))) v_ArrVal_250) (+ .cse0 (* |v_ULTIMATE.start_main_~j~0#1_79| (- 4)) |c_ULTIMATE.start_main_~#volArray~0#1.offset|) v_ArrVal_251)) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 12)) 0) (< |c_ULTIMATE.start_main_~j~0#1| (+ |v_ULTIMATE.start_main_~j~0#1_82| 1)) (< (+ |v_ULTIMATE.start_main_~j~0#1_79| 1) |v_ULTIMATE.start_main_~j~0#1_81|))) is different from false [2023-12-18 18:34:09,548 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2023-12-18 18:34:09,550 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2023-12-18 18:34:09,680 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 2 proven. 86 refuted. 0 times theorem prover too weak. 7 trivial. 37 not checked. [2023-12-18 18:34:09,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708430869] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 18:34:09,680 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 18:34:09,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20, 23] total 52 [2023-12-18 18:34:09,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924521276] [2023-12-18 18:34:09,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 18:34:09,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2023-12-18 18:34:09,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:34:09,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2023-12-18 18:34:09,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=374, Invalid=2076, Unknown=8, NotChecked=194, Total=2652 [2023-12-18 18:34:09,682 INFO L87 Difference]: Start difference. First operand 82 states and 94 transitions. Second operand has 52 states, 52 states have (on average 2.826923076923077) internal successors, (147), 52 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 18:34:11,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:34:11,205 INFO L93 Difference]: Finished difference Result 189 states and 219 transitions. [2023-12-18 18:34:11,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-12-18 18:34:11,205 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.826923076923077) internal successors, (147), 52 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2023-12-18 18:34:11,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:34:11,206 INFO L225 Difference]: With dead ends: 189 [2023-12-18 18:34:11,206 INFO L226 Difference]: Without dead ends: 122 [2023-12-18 18:34:11,208 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 86 SyntacticMatches, 7 SemanticMatches, 88 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 2306 ImplicationChecksByTransitivity, 44.1s TimeCoverageRelationStatistics Valid=1301, Invalid=6355, Unknown=8, NotChecked=346, Total=8010 [2023-12-18 18:34:11,208 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 333 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 821 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 333 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 1141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 821 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 188 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-18 18:34:11,208 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [333 Valid, 190 Invalid, 1141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 821 Invalid, 0 Unknown, 188 Unchecked, 0.4s Time] [2023-12-18 18:34:11,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2023-12-18 18:34:11,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 93. [2023-12-18 18:34:11,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.1195652173913044) internal successors, (103), 92 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 18:34:11,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 103 transitions. [2023-12-18 18:34:11,219 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 103 transitions. Word has length 57 [2023-12-18 18:34:11,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:34:11,219 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 103 transitions. [2023-12-18 18:34:11,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.826923076923077) internal successors, (147), 52 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 18:34:11,219 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 103 transitions. [2023-12-18 18:34:11,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-12-18 18:34:11,219 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:34:11,220 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 6, 5, 5, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:34:11,224 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 18:34:11,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-12-18 18:34:11,420 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:34:11,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:34:11,421 INFO L85 PathProgramCache]: Analyzing trace with hash -2097464922, now seen corresponding path program 7 times [2023-12-18 18:34:11,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:34:11,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050397678] [2023-12-18 18:34:11,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:34:11,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:34:11,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:34:11,946 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 9 proven. 120 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-18 18:34:11,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:34:11,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050397678] [2023-12-18 18:34:11,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050397678] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:34:11,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452647790] [2023-12-18 18:34:11,946 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-18 18:34:11,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:34:11,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:34:11,956 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 18:34:11,958 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 18:34:12,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:34:12,037 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 34 conjunts are in the unsatisfiable core [2023-12-18 18:34:12,039 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:34:12,170 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 18:34:12,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 18:34:12,232 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 31 treesize of output 11 [2023-12-18 18:34:12,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 18:34:12,266 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 31 treesize of output 11 [2023-12-18 18:34:12,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 18:34:12,301 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 31 treesize of output 11 [2023-12-18 18:34:12,533 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-12-18 18:34:12,538 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 15 proven. 114 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-18 18:34:12,538 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 18:34:53,214 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_295 Int) (v_ArrVal_293 Int) (v_ArrVal_291 Int) (|v_ULTIMATE.start_main_~j~0#1_94| Int) (|v_ULTIMATE.start_main_~j~0#1_95| Int)) (or (< |c_ULTIMATE.start_main_~j~0#1| (+ |v_ULTIMATE.start_main_~j~0#1_95| 1)) (< |v_ULTIMATE.start_main_~j~0#1_95| (+ |v_ULTIMATE.start_main_~j~0#1_94| 1)) (< |c_ULTIMATE.start_main_~MINVAL~0#1| (+ (select (let ((.cse0 (* 16 |c_ULTIMATE.start_main_~i~0#1|))) (store (store (store (select |c_#memory_int#2| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ .cse0 |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* |c_ULTIMATE.start_main_~j~0#1| (- 4))) v_ArrVal_291) (+ (* |v_ULTIMATE.start_main_~j~0#1_95| (- 4)) .cse0 |c_ULTIMATE.start_main_~#volArray~0#1.offset|) v_ArrVal_293) (+ .cse0 (* |v_ULTIMATE.start_main_~j~0#1_94| (- 4)) |c_ULTIMATE.start_main_~#volArray~0#1.offset|) v_ArrVal_295)) (+ 16 |c_ULTIMATE.start_main_~#volArray~0#1.offset|)) 1)))) is different from false [2023-12-18 18:35:10,272 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 49 [2023-12-18 18:35:10,286 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23790 treesize of output 23534 [2023-12-18 18:35:13,572 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 11 proven. 102 refuted. 0 times theorem prover too weak. 22 trivial. 16 not checked. [2023-12-18 18:35:13,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452647790] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 18:35:13,572 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 18:35:13,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 19] total 48 [2023-12-18 18:35:13,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001219673] [2023-12-18 18:35:13,572 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 18:35:13,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-12-18 18:35:13,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:35:13,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-12-18 18:35:13,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=1876, Unknown=15, NotChecked=90, Total=2256 [2023-12-18 18:35:13,574 INFO L87 Difference]: Start difference. First operand 93 states and 103 transitions. Second operand has 48 states, 48 states have (on average 3.1666666666666665) internal successors, (152), 48 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 18:35:19,906 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-18 18:35:23,921 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-18 18:35:27,935 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-18 18:35:31,955 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-18 18:35:35,967 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-18 18:35:39,982 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-18 18:35:40,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:35:40,512 INFO L93 Difference]: Finished difference Result 267 states and 294 transitions. [2023-12-18 18:35:40,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-12-18 18:35:40,513 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 3.1666666666666665) internal successors, (152), 48 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2023-12-18 18:35:40,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:35:40,513 INFO L225 Difference]: With dead ends: 267 [2023-12-18 18:35:40,513 INFO L226 Difference]: Without dead ends: 258 [2023-12-18 18:35:40,515 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 96 SyntacticMatches, 8 SemanticMatches, 93 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2653 ImplicationChecksByTransitivity, 63.0s TimeCoverageRelationStatistics Valid=1103, Invalid=7628, Unknown=15, NotChecked=184, Total=8930 [2023-12-18 18:35:40,515 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 478 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 1158 mSolverCounterSat, 123 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 478 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 1466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 1158 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 179 IncrementalHoareTripleChecker+Unchecked, 24.9s IncrementalHoareTripleChecker+Time [2023-12-18 18:35:40,516 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [478 Valid, 323 Invalid, 1466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 1158 Invalid, 6 Unknown, 179 Unchecked, 24.9s Time] [2023-12-18 18:35:40,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2023-12-18 18:35:40,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 163. [2023-12-18 18:35:40,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 1.1296296296296295) internal successors, (183), 162 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 18:35:40,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 183 transitions. [2023-12-18 18:35:40,553 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 183 transitions. Word has length 62 [2023-12-18 18:35:40,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:35:40,554 INFO L495 AbstractCegarLoop]: Abstraction has 163 states and 183 transitions. [2023-12-18 18:35:40,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 3.1666666666666665) internal successors, (152), 48 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 18:35:40,554 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 183 transitions. [2023-12-18 18:35:40,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-12-18 18:35:40,554 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:35:40,554 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 6, 6, 6, 5, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:35:40,559 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 18:35:40,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-12-18 18:35:40,756 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:35:40,756 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:35:40,756 INFO L85 PathProgramCache]: Analyzing trace with hash -2006793980, now seen corresponding path program 8 times [2023-12-18 18:35:40,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:35:40,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837920501] [2023-12-18 18:35:40,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:35:40,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:35:40,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:35:41,351 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-18 18:35:41,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:35:41,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837920501] [2023-12-18 18:35:41,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837920501] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:35:41,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642004743] [2023-12-18 18:35:41,352 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-18 18:35:41,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:35:41,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:35:41,353 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 18:35:41,354 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 18:35:41,445 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-18 18:35:41,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 18:35:41,446 INFO L262 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 51 conjunts are in the unsatisfiable core [2023-12-18 18:35:41,449 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:35:41,661 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-18 18:35:41,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 18:35:41,753 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 31 treesize of output 11 [2023-12-18 18:35:41,807 INFO L349 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2023-12-18 18:35:41,808 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 26 [2023-12-18 18:35:42,575 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-18 18:35:42,575 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 18:35:47,286 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 57 [2023-12-18 18:35:47,298 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 331 treesize of output 315 [2023-12-18 18:35:47,461 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 0 proven. 151 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-12-18 18:35:47,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642004743] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 18:35:47,461 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 18:35:47,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 21] total 57 [2023-12-18 18:35:47,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048129123] [2023-12-18 18:35:47,462 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 18:35:47,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2023-12-18 18:35:47,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:35:47,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2023-12-18 18:35:47,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=2913, Unknown=1, NotChecked=0, Total=3192 [2023-12-18 18:35:47,463 INFO L87 Difference]: Start difference. First operand 163 states and 183 transitions. Second operand has 57 states, 57 states have (on average 2.9649122807017543) internal successors, (169), 57 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 18:35:55,456 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-12-18 18:35:59,815 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-18 18:36:03,383 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.57s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-18 18:36:07,307 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.91s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-18 18:36:11,231 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.92s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-12-18 18:36:14,996 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.76s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-18 18:36:16,135 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-18 18:36:20,161 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-18 18:36:24,172 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-18 18:36:28,212 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-12-18 18:36:32,216 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-18 18:36:36,225 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-12-18 18:36:40,235 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-18 18:36:44,244 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-18 18:36:48,493 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-18 18:36:51,437 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.94s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-18 18:36:54,155 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.72s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-18 18:36:57,126 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.97s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-18 18:37:00,129 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-18 18:37:03,320 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-18 18:37:13,350 WARN L539 Checker$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 18:37:18,674 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 18:37:56,736 WARN L539 Checker$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 18:38:00,826 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 18:38:13,647 WARN L539 Checker$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 18:38:17,733 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 18:38:22,052 WARN L539 Checker$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 18:38:22,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:38:22,139 INFO L93 Difference]: Finished difference Result 315 states and 348 transitions. [2023-12-18 18:38:22,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2023-12-18 18:38:22,139 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.9649122807017543) internal successors, (169), 57 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2023-12-18 18:38:22,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:38:22,140 INFO L225 Difference]: With dead ends: 315 [2023-12-18 18:38:22,140 INFO L226 Difference]: Without dead ends: 306 [2023-12-18 18:38:22,145 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8643 ImplicationChecksByTransitivity, 56.9s TimeCoverageRelationStatistics Valid=2745, Invalid=23970, Unknown=17, NotChecked=0, Total=26732 [2023-12-18 18:38:22,145 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 1094 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 1712 mSolverCounterSat, 201 mSolverCounterUnsat, 31 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 102.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1094 SdHoareTripleChecker+Valid, 387 SdHoareTripleChecker+Invalid, 1944 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 1712 IncrementalHoareTripleChecker+Invalid, 31 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 103.1s IncrementalHoareTripleChecker+Time [2023-12-18 18:38:22,145 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1094 Valid, 387 Invalid, 1944 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 1712 Invalid, 31 Unknown, 0 Unchecked, 103.1s Time] [2023-12-18 18:38:22,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2023-12-18 18:38:22,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 190. [2023-12-18 18:38:22,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 1.1322751322751323) internal successors, (214), 189 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 18:38:22,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 214 transitions. [2023-12-18 18:38:22,197 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 214 transitions. Word has length 67 [2023-12-18 18:38:22,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:38:22,197 INFO L495 AbstractCegarLoop]: Abstraction has 190 states and 214 transitions. [2023-12-18 18:38:22,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.9649122807017543) internal successors, (169), 57 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 18:38:22,197 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 214 transitions. [2023-12-18 18:38:22,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-12-18 18:38:22,198 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:38:22,198 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 9, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:38:22,202 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 18:38:22,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-12-18 18:38:22,403 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:38:22,403 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:38:22,403 INFO L85 PathProgramCache]: Analyzing trace with hash 1585114108, now seen corresponding path program 9 times [2023-12-18 18:38:22,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:38:22,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892128649] [2023-12-18 18:38:22,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:38:22,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:38:22,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:38:23,869 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 6 proven. 252 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-18 18:38:23,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:38:23,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892128649] [2023-12-18 18:38:23,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892128649] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:38:23,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078386616] [2023-12-18 18:38:23,869 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-18 18:38:23,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:38:23,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:38:23,870 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 18:38:23,880 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 18:38:24,061 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2023-12-18 18:38:24,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 18:38:24,063 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 84 conjunts are in the unsatisfiable core [2023-12-18 18:38:24,066 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:38:24,313 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 18:38:24,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 18:38:24,407 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 31 treesize of output 11 [2023-12-18 18:38:24,493 INFO L349 Elim1Store]: treesize reduction 27, result has 35.7 percent of original size [2023-12-18 18:38:24,493 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2023-12-18 18:38:24,653 INFO L349 Elim1Store]: treesize reduction 66, result has 33.3 percent of original size [2023-12-18 18:38:24,654 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 74 treesize of output 61 [2023-12-18 18:38:25,178 INFO L349 Elim1Store]: treesize reduction 162, result has 49.1 percent of original size [2023-12-18 18:38:25,178 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 149 treesize of output 225 [2023-12-18 18:39:12,582 WARN L293 SmtUtils]: Spent 7.96s on a formula simplification. DAG size of input: 2048 DAG size of output: 2131 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-12-18 18:41:05,510 WARN L293 SmtUtils]: Spent 46.23s on a formula simplification. DAG size of input: 2970 DAG size of output: 2882 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-18 18:43:38,848 WARN L293 SmtUtils]: Spent 5.40s on a formula simplification that was a NOOP. DAG size: 3056 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) Received shutdown request... [2023-12-18 18:43:52,571 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-18 18:43:52,578 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-12-18 18:43:52,586 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-18 18:43:52,611 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-18 18:43:52,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-12-18 18:43:52,776 WARN L619 AbstractCegarLoop]: Verification canceled: while NwaCegarLoop was analyzing trace of length 68 with TraceHistMax 12,while TraceCheckSpWp was constructing forward predicates,while PolyPacSimplificationTermWalker was simplifying a ATOM-1 term,while PolyPacSimplificationTermWalker was simplifying 3 xjuncts wrt. a ∧-8-1 context. [2023-12-18 18:43:52,779 INFO L445 BasicCegarLoop]: Path program histogram: [9, 2, 1, 1, 1, 1, 1] [2023-12-18 18:43:52,781 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-12-18 18:43:52,782 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.12 06:43:52 BoogieIcfgContainer [2023-12-18 18:43:52,782 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-18 18:43:52,782 INFO L158 Benchmark]: Toolchain (without parser) took 867254.82ms. Allocated memory was 337.6MB in the beginning and 843.1MB in the end (delta: 505.4MB). Free memory was 279.8MB in the beginning and 445.5MB in the end (delta: -165.8MB). Peak memory consumption was 515.9MB. Max. memory is 8.0GB. [2023-12-18 18:43:52,783 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 187.7MB. Free memory is still 133.9MB. There was no memory consumed. Max. memory is 8.0GB. [2023-12-18 18:43:52,783 INFO L158 Benchmark]: CACSL2BoogieTranslator took 191.60ms. Allocated memory is still 337.6MB. Free memory was 279.8MB in the beginning and 268.2MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-12-18 18:43:52,783 INFO L158 Benchmark]: Boogie Procedure Inliner took 20.62ms. Allocated memory is still 337.6MB. Free memory was 268.2MB in the beginning and 266.6MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-12-18 18:43:52,783 INFO L158 Benchmark]: Boogie Preprocessor took 23.95ms. Allocated memory is still 337.6MB. Free memory was 266.6MB in the beginning and 264.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-18 18:43:52,783 INFO L158 Benchmark]: RCFGBuilder took 350.29ms. Allocated memory is still 337.6MB. Free memory was 264.6MB in the beginning and 249.9MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 8.0GB. [2023-12-18 18:43:52,784 INFO L158 Benchmark]: TraceAbstraction took 866664.45ms. Allocated memory was 337.6MB in the beginning and 843.1MB in the end (delta: 505.4MB). Free memory was 249.3MB in the beginning and 445.5MB in the end (delta: -196.2MB). Peak memory consumption was 485.5MB. Max. memory is 8.0GB. [2023-12-18 18:43:52,784 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 187.7MB. Free memory is still 133.9MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 191.60ms. Allocated memory is still 337.6MB. Free memory was 279.8MB in the beginning and 268.2MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 20.62ms. Allocated memory is still 337.6MB. Free memory was 268.2MB in the beginning and 266.6MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 23.95ms. Allocated memory is still 337.6MB. Free memory was 266.6MB in the beginning and 264.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 350.29ms. Allocated memory is still 337.6MB. Free memory was 264.6MB in the beginning and 249.9MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 8.0GB. * TraceAbstraction took 866664.45ms. Allocated memory was 337.6MB in the beginning and 843.1MB in the end (delta: 505.4MB). Free memory was 249.3MB in the beginning and 445.5MB in the end (delta: -196.2MB). Peak memory consumption was 485.5MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 8]: Timeout (TraceAbstraction) Unable to prove that a call to reach_error is unreachable (line 8). Cancelled while NwaCegarLoop was analyzing trace of length 68 with TraceHistMax 12,while TraceCheckSpWp was constructing forward predicates,while PolyPacSimplificationTermWalker was simplifying a ATOM-1 term,while PolyPacSimplificationTermWalker was simplifying 3 xjuncts wrt. a ∧-8-1 context. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 22 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 866.6s, OverallIterations: 16, TraceHistogramMax: 12, PathProgramHistogramMax: 9, EmptinessCheckTime: 0.0s, AutomataDifference: 211.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 45 mSolverCounterUnknown, 3477 SdHoareTripleChecker+Valid, 140.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 3477 mSDsluCounter, 2107 SdHoareTripleChecker+Invalid, 139.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 686 IncrementalHoareTripleChecker+Unchecked, 1872 mSDsCounter, 786 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 7288 IncrementalHoareTripleChecker+Invalid, 8805 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 786 mSolverCounterUnsat, 235 mSDtfsCounter, 7288 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1457 GetRequests, 682 SyntacticMatches, 22 SemanticMatches, 753 ConstructedPredicates, 7 IntricatePredicates, 0 DeprecatedPredicates, 21636 ImplicationChecksByTransitivity, 381.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=190occurred in iteration=15, InterpolantAutomatonStates: 423, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 15 MinimizatonAttempts, 516 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 320.8s InterpolantComputationTime, 977 NumberOfCodeBlocks, 965 NumberOfCodeBlocksAsserted, 50 NumberOfCheckSat, 1377 ConstructedInterpolants, 110 QuantifiedInterpolants, 19469 SizeOfPredicates, 133 NumberOfNonLiveVariables, 1585 ConjunctsInSsa, 323 ConjunctsInUnsatCore, 36 InterpolantComputations, 5 PerfectInterpolantSequences, 551/2369 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