/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.use.bitabs.translation false -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/array-examples/standard_running-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-20 06:36:46,261 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-20 06:36:46,319 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-12-20 06:36:46,324 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-20 06:36:46,324 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-20 06:36:46,349 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-20 06:36:46,350 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-20 06:36:46,350 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-20 06:36:46,350 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-20 06:36:46,353 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-20 06:36:46,353 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-20 06:36:46,354 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-20 06:36:46,354 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-20 06:36:46,355 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-20 06:36:46,355 INFO L153 SettingsManager]: * Use SBE=true [2023-12-20 06:36:46,355 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-20 06:36:46,355 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-20 06:36:46,355 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-20 06:36:46,356 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-20 06:36:46,356 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-20 06:36:46,356 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-20 06:36:46,356 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-20 06:36:46,356 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-20 06:36:46,356 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-20 06:36:46,357 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-20 06:36:46,357 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-20 06:36:46,357 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-20 06:36:46,357 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-20 06:36:46,357 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-20 06:36:46,358 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-20 06:36:46,358 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-20 06:36:46,358 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-20 06:36:46,358 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-20 06:36:46,359 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-20 06:36:46,359 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-20 06:36:46,359 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-20 06:36:46,359 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-20 06:36:46,359 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-20 06:36:46,359 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-20 06:36:46,359 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-20 06:36:46,359 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-20 06:36:46,359 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-20 06:36:46,360 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-20 06:36:46,360 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> false [2023-12-20 06:36:46,555 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-20 06:36:46,572 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-20 06:36:46,573 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-20 06:36:46,574 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-20 06:36:46,574 INFO L274 PluginConnector]: CDTParser initialized [2023-12-20 06:36:46,575 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_running-2.i [2023-12-20 06:36:47,526 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-20 06:36:47,668 INFO L384 CDTParser]: Found 1 translation units. [2023-12-20 06:36:47,669 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_running-2.i [2023-12-20 06:36:47,674 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/824749f0a/6c30ad0496dc4a338175f6f1116a2c06/FLAGbc94b2092 [2023-12-20 06:36:47,728 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/824749f0a/6c30ad0496dc4a338175f6f1116a2c06 [2023-12-20 06:36:47,732 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-20 06:36:47,733 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-20 06:36:47,735 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-20 06:36:47,735 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-20 06:36:47,742 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-20 06:36:47,743 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.12 06:36:47" (1/1) ... [2023-12-20 06:36:47,743 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@628e4fea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 06:36:47, skipping insertion in model container [2023-12-20 06:36:47,743 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.12 06:36:47" (1/1) ... [2023-12-20 06:36:47,757 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-20 06:36:47,848 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-examples/standard_running-2.i[811,824] [2023-12-20 06:36:47,857 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-20 06:36:47,862 INFO L202 MainTranslator]: Completed pre-run [2023-12-20 06:36:47,870 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-examples/standard_running-2.i[811,824] [2023-12-20 06:36:47,875 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-20 06:36:47,884 INFO L206 MainTranslator]: Completed translation [2023-12-20 06:36:47,884 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 06:36:47 WrapperNode [2023-12-20 06:36:47,884 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-20 06:36:47,885 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-20 06:36:47,885 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-20 06:36:47,885 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-20 06:36:47,889 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 06:36:47" (1/1) ... [2023-12-20 06:36:47,900 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 06:36:47" (1/1) ... [2023-12-20 06:36:47,911 INFO L138 Inliner]: procedures = 16, calls = 21, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 84 [2023-12-20 06:36:47,911 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-20 06:36:47,912 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-20 06:36:47,912 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-20 06:36:47,912 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-20 06:36:47,918 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 06:36:47" (1/1) ... [2023-12-20 06:36:47,918 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 06:36:47" (1/1) ... [2023-12-20 06:36:47,920 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 06:36:47" (1/1) ... [2023-12-20 06:36:47,930 INFO L175 MemorySlicer]: Split 10 memory accesses to 3 slices as follows [2, 4, 4]. 40 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 3 writes are split as follows [0, 2, 1]. [2023-12-20 06:36:47,930 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 06:36:47" (1/1) ... [2023-12-20 06:36:47,931 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 06:36:47" (1/1) ... [2023-12-20 06:36:47,934 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 06:36:47" (1/1) ... [2023-12-20 06:36:47,935 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 06:36:47" (1/1) ... [2023-12-20 06:36:47,936 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 06:36:47" (1/1) ... [2023-12-20 06:36:47,937 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 06:36:47" (1/1) ... [2023-12-20 06:36:47,938 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-20 06:36:47,938 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-20 06:36:47,938 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-20 06:36:47,938 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-20 06:36:47,939 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 06:36:47" (1/1) ... [2023-12-20 06:36:47,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-20 06:36:47,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 06:36:47,960 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-12-20 06:36:47,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-12-20 06:36:47,986 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-20 06:36:47,987 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-20 06:36:47,987 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-12-20 06:36:47,987 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-12-20 06:36:47,987 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-20 06:36:47,987 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-12-20 06:36:47,988 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-12-20 06:36:47,988 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-12-20 06:36:47,989 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-20 06:36:47,989 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-20 06:36:47,989 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-12-20 06:36:47,989 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-12-20 06:36:47,989 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-12-20 06:36:47,989 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-20 06:36:48,044 INFO L241 CfgBuilder]: Building ICFG [2023-12-20 06:36:48,046 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-20 06:36:48,132 INFO L282 CfgBuilder]: Performing block encoding [2023-12-20 06:36:48,159 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-20 06:36:48,163 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-12-20 06:36:48,163 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.12 06:36:48 BoogieIcfgContainer [2023-12-20 06:36:48,163 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-20 06:36:48,165 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-20 06:36:48,165 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-20 06:36:48,167 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-20 06:36:48,167 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.12 06:36:47" (1/3) ... [2023-12-20 06:36:48,167 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8606074 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.12 06:36:48, skipping insertion in model container [2023-12-20 06:36:48,167 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 06:36:47" (2/3) ... [2023-12-20 06:36:48,168 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8606074 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.12 06:36:48, skipping insertion in model container [2023-12-20 06:36:48,168 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.12 06:36:48" (3/3) ... [2023-12-20 06:36:48,169 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_running-2.i [2023-12-20 06:36:48,179 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-20 06:36:48,179 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-20 06:36:48,207 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-20 06:36:48,213 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;@228a672, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-20 06:36:48,213 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-20 06:36:48,219 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 06:36:48,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-12-20 06:36:48,222 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 06:36:48,223 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 06:36:48,223 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 06:36:48,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 06:36:48,226 INFO L85 PathProgramCache]: Analyzing trace with hash -572000217, now seen corresponding path program 1 times [2023-12-20 06:36:48,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 06:36:48,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526154459] [2023-12-20 06:36:48,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 06:36:48,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 06:36:48,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 06:36:48,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 06:36:48,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 06:36:48,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526154459] [2023-12-20 06:36:48,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526154459] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 06:36:48,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 06:36:48,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-20 06:36:48,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692292465] [2023-12-20 06:36:48,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 06:36:48,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-20 06:36:48,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 06:36:48,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-20 06:36:48,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-20 06:36:48,383 INFO L87 Difference]: Start difference. First operand has 20 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 06:36:48,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 06:36:48,453 INFO L93 Difference]: Finished difference Result 49 states and 80 transitions. [2023-12-20 06:36:48,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-20 06:36:48,455 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2023-12-20 06:36:48,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 06:36:48,460 INFO L225 Difference]: With dead ends: 49 [2023-12-20 06:36:48,460 INFO L226 Difference]: Without dead ends: 29 [2023-12-20 06:36:48,462 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-20 06:36:48,464 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 13 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 06:36:48,465 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 25 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 06:36:48,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-12-20 06:36:48,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 21. [2023-12-20 06:36:48,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 06:36:48,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 28 transitions. [2023-12-20 06:36:48,485 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 28 transitions. Word has length 9 [2023-12-20 06:36:48,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 06:36:48,485 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 28 transitions. [2023-12-20 06:36:48,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 06:36:48,485 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 28 transitions. [2023-12-20 06:36:48,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-12-20 06:36:48,486 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 06:36:48,486 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 06:36:48,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-20 06:36:48,486 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 06:36:48,487 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 06:36:48,487 INFO L85 PathProgramCache]: Analyzing trace with hash 137950365, now seen corresponding path program 1 times [2023-12-20 06:36:48,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 06:36:48,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635311881] [2023-12-20 06:36:48,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 06:36:48,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 06:36:48,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 06:36:48,575 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-20 06:36:48,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 06:36:48,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635311881] [2023-12-20 06:36:48,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635311881] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 06:36:48,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648182968] [2023-12-20 06:36:48,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 06:36:48,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 06:36:48,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 06:36:48,587 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 06:36:48,591 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-20 06:36:48,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 06:36:48,658 INFO L262 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-20 06:36:48,661 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 06:36:48,702 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-20 06:36:48,702 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 06:36:48,731 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-20 06:36:48,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648182968] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 06:36:48,733 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 06:36:48,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-12-20 06:36:48,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130281361] [2023-12-20 06:36:48,734 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 06:36:48,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-20 06:36:48,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 06:36:48,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-20 06:36:48,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-12-20 06:36:48,739 INFO L87 Difference]: Start difference. First operand 21 states and 28 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 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) [2023-12-20 06:36:48,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 06:36:48,839 INFO L93 Difference]: Finished difference Result 72 states and 109 transitions. [2023-12-20 06:36:48,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-20 06:36:48,840 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-12-20 06:36:48,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 06:36:48,842 INFO L225 Difference]: With dead ends: 72 [2023-12-20 06:36:48,842 INFO L226 Difference]: Without dead ends: 54 [2023-12-20 06:36:48,843 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-12-20 06:36:48,844 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 65 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 06:36:48,845 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 47 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 06:36:48,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-12-20 06:36:48,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2023-12-20 06:36:48,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.4339622641509433) internal successors, (76), 53 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 06:36:48,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 76 transitions. [2023-12-20 06:36:48,860 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 76 transitions. Word has length 20 [2023-12-20 06:36:48,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 06:36:48,861 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 76 transitions. [2023-12-20 06:36:48,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 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) [2023-12-20 06:36:48,861 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 76 transitions. [2023-12-20 06:36:48,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-12-20 06:36:48,863 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 06:36:48,864 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 06:36:48,885 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-12-20 06:36:49,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 06:36:49,071 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 06:36:49,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 06:36:49,072 INFO L85 PathProgramCache]: Analyzing trace with hash 935035248, now seen corresponding path program 2 times [2023-12-20 06:36:49,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 06:36:49,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876124315] [2023-12-20 06:36:49,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 06:36:49,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 06:36:49,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 06:36:49,301 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2023-12-20 06:36:49,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 06:36:49,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876124315] [2023-12-20 06:36:49,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876124315] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 06:36:49,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 06:36:49,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-20 06:36:49,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902545805] [2023-12-20 06:36:49,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 06:36:49,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-20 06:36:49,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 06:36:49,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-20 06:36:49,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-20 06:36:49,303 INFO L87 Difference]: Start difference. First operand 54 states and 76 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 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) [2023-12-20 06:36:49,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 06:36:49,353 INFO L93 Difference]: Finished difference Result 105 states and 151 transitions. [2023-12-20 06:36:49,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-20 06:36:49,354 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 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) Word has length 53 [2023-12-20 06:36:49,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 06:36:49,355 INFO L225 Difference]: With dead ends: 105 [2023-12-20 06:36:49,356 INFO L226 Difference]: Without dead ends: 78 [2023-12-20 06:36:49,356 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-12-20 06:36:49,358 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 3 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 06:36:49,358 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 45 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 06:36:49,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2023-12-20 06:36:49,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 66. [2023-12-20 06:36:49,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.4153846153846155) internal successors, (92), 65 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) [2023-12-20 06:36:49,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 92 transitions. [2023-12-20 06:36:49,363 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 92 transitions. Word has length 53 [2023-12-20 06:36:49,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 06:36:49,363 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 92 transitions. [2023-12-20 06:36:49,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 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) [2023-12-20 06:36:49,364 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 92 transitions. [2023-12-20 06:36:49,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-12-20 06:36:49,364 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 06:36:49,365 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 06:36:49,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-20 06:36:49,365 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 06:36:49,365 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 06:36:49,365 INFO L85 PathProgramCache]: Analyzing trace with hash 1511067120, now seen corresponding path program 1 times [2023-12-20 06:36:49,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 06:36:49,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740699222] [2023-12-20 06:36:49,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 06:36:49,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 06:36:49,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 06:36:49,517 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2023-12-20 06:36:49,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 06:36:49,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740699222] [2023-12-20 06:36:49,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740699222] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 06:36:49,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 06:36:49,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-20 06:36:49,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757225676] [2023-12-20 06:36:49,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 06:36:49,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-20 06:36:49,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 06:36:49,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-20 06:36:49,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-20 06:36:49,519 INFO L87 Difference]: Start difference. First operand 66 states and 92 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 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) [2023-12-20 06:36:49,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 06:36:49,560 INFO L93 Difference]: Finished difference Result 124 states and 174 transitions. [2023-12-20 06:36:49,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-20 06:36:49,560 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2023-12-20 06:36:49,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 06:36:49,563 INFO L225 Difference]: With dead ends: 124 [2023-12-20 06:36:49,563 INFO L226 Difference]: Without dead ends: 86 [2023-12-20 06:36:49,563 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-12-20 06:36:49,566 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 6 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 06:36:49,566 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 44 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 06:36:49,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2023-12-20 06:36:49,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 70. [2023-12-20 06:36:49,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.391304347826087) internal successors, (96), 69 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 06:36:49,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 96 transitions. [2023-12-20 06:36:49,571 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 96 transitions. Word has length 53 [2023-12-20 06:36:49,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 06:36:49,571 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 96 transitions. [2023-12-20 06:36:49,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 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) [2023-12-20 06:36:49,571 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 96 transitions. [2023-12-20 06:36:49,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-12-20 06:36:49,572 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 06:36:49,572 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 06:36:49,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-20 06:36:49,572 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 06:36:49,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 06:36:49,573 INFO L85 PathProgramCache]: Analyzing trace with hash -2106781328, now seen corresponding path program 1 times [2023-12-20 06:36:49,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 06:36:49,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002684824] [2023-12-20 06:36:49,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 06:36:49,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 06:36:49,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 06:36:49,694 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2023-12-20 06:36:49,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 06:36:49,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002684824] [2023-12-20 06:36:49,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002684824] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 06:36:49,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424135153] [2023-12-20 06:36:49,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 06:36:49,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 06:36:49,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 06:36:49,696 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 06:36:49,718 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-20 06:36:49,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 06:36:49,774 INFO L262 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-20 06:36:49,777 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 06:36:49,812 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2023-12-20 06:36:49,813 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 06:36:49,881 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2023-12-20 06:36:49,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424135153] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 06:36:49,882 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 06:36:49,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-12-20 06:36:49,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334822401] [2023-12-20 06:36:49,882 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 06:36:49,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-12-20 06:36:49,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 06:36:49,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-12-20 06:36:49,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-12-20 06:36:49,886 INFO L87 Difference]: Start difference. First operand 70 states and 96 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 06:36:50,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 06:36:50,031 INFO L93 Difference]: Finished difference Result 224 states and 329 transitions. [2023-12-20 06:36:50,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-20 06:36:50,031 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2023-12-20 06:36:50,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 06:36:50,033 INFO L225 Difference]: With dead ends: 224 [2023-12-20 06:36:50,033 INFO L226 Difference]: Without dead ends: 160 [2023-12-20 06:36:50,034 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-12-20 06:36:50,034 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 312 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 06:36:50,035 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [312 Valid, 80 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 06:36:50,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2023-12-20 06:36:50,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2023-12-20 06:36:50,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 1.3962264150943395) internal successors, (222), 159 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 06:36:50,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 222 transitions. [2023-12-20 06:36:50,055 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 222 transitions. Word has length 53 [2023-12-20 06:36:50,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 06:36:50,055 INFO L495 AbstractCegarLoop]: Abstraction has 160 states and 222 transitions. [2023-12-20 06:36:50,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 06:36:50,056 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 222 transitions. [2023-12-20 06:36:50,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2023-12-20 06:36:50,058 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 06:36:50,058 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 06:36:50,065 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-20 06:36:50,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 06:36:50,259 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 06:36:50,259 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 06:36:50,259 INFO L85 PathProgramCache]: Analyzing trace with hash -1885477296, now seen corresponding path program 2 times [2023-12-20 06:36:50,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 06:36:50,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483774044] [2023-12-20 06:36:50,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 06:36:50,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 06:36:50,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 06:36:50,502 INFO L134 CoverageAnalysis]: Checked inductivity of 525 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 470 trivial. 0 not checked. [2023-12-20 06:36:50,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 06:36:50,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483774044] [2023-12-20 06:36:50,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483774044] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 06:36:50,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878040506] [2023-12-20 06:36:50,503 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-20 06:36:50,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 06:36:50,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 06:36:50,504 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 06:36:50,532 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-20 06:36:50,632 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-20 06:36:50,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 06:36:50,634 INFO L262 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-20 06:36:50,638 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 06:36:50,669 INFO L134 CoverageAnalysis]: Checked inductivity of 525 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 470 trivial. 0 not checked. [2023-12-20 06:36:50,670 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 06:36:50,845 INFO L134 CoverageAnalysis]: Checked inductivity of 525 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 470 trivial. 0 not checked. [2023-12-20 06:36:50,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878040506] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 06:36:50,845 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 06:36:50,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2023-12-20 06:36:50,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579682261] [2023-12-20 06:36:50,845 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 06:36:50,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-12-20 06:36:50,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 06:36:50,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-12-20 06:36:50,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-12-20 06:36:50,849 INFO L87 Difference]: Start difference. First operand 160 states and 222 transitions. Second operand has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 06:36:51,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 06:36:51,132 INFO L93 Difference]: Finished difference Result 488 states and 719 transitions. [2023-12-20 06:36:51,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-12-20 06:36:51,132 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 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 119 [2023-12-20 06:36:51,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 06:36:51,135 INFO L225 Difference]: With dead ends: 488 [2023-12-20 06:36:51,135 INFO L226 Difference]: Without dead ends: 340 [2023-12-20 06:36:51,137 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 225 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-12-20 06:36:51,138 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 650 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 650 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-20 06:36:51,139 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [650 Valid, 161 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-20 06:36:51,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2023-12-20 06:36:51,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 340. [2023-12-20 06:36:51,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 1.3982300884955752) internal successors, (474), 339 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 06:36:51,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 474 transitions. [2023-12-20 06:36:51,158 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 474 transitions. Word has length 119 [2023-12-20 06:36:51,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 06:36:51,158 INFO L495 AbstractCegarLoop]: Abstraction has 340 states and 474 transitions. [2023-12-20 06:36:51,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 06:36:51,158 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 474 transitions. [2023-12-20 06:36:51,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2023-12-20 06:36:51,167 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 06:36:51,168 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 06:36:51,175 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-20 06:36:51,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 06:36:51,375 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 06:36:51,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 06:36:51,375 INFO L85 PathProgramCache]: Analyzing trace with hash -1998407664, now seen corresponding path program 3 times [2023-12-20 06:36:51,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 06:36:51,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029383950] [2023-12-20 06:36:51,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 06:36:51,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 06:36:51,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 06:36:52,155 INFO L134 CoverageAnalysis]: Checked inductivity of 2607 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 2354 trivial. 0 not checked. [2023-12-20 06:36:52,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 06:36:52,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029383950] [2023-12-20 06:36:52,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029383950] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 06:36:52,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249603918] [2023-12-20 06:36:52,155 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-20 06:36:52,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 06:36:52,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 06:36:52,157 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 06:36:52,182 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-20 06:36:52,272 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-20 06:36:52,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 06:36:52,274 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 19 conjunts are in the unsatisfiable core [2023-12-20 06:36:52,288 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 06:36:52,428 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 [2023-12-20 06:36:52,909 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 06:36:52,910 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 25 [2023-12-20 06:36:52,990 INFO L134 CoverageAnalysis]: Checked inductivity of 2607 backedges. 107 proven. 127 refuted. 0 times theorem prover too weak. 2373 trivial. 0 not checked. [2023-12-20 06:36:52,991 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 06:36:53,316 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 17 treesize of output 15 [2023-12-20 06:36:53,318 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 12 treesize of output 8 [2023-12-20 06:36:53,341 INFO L134 CoverageAnalysis]: Checked inductivity of 2607 backedges. 64 proven. 148 refuted. 0 times theorem prover too weak. 2395 trivial. 0 not checked. [2023-12-20 06:36:53,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249603918] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 06:36:53,341 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 06:36:53,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 11, 9] total 40 [2023-12-20 06:36:53,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131471839] [2023-12-20 06:36:53,341 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 06:36:53,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-12-20 06:36:53,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 06:36:53,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-12-20 06:36:53,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=534, Invalid=1026, Unknown=0, NotChecked=0, Total=1560 [2023-12-20 06:36:53,343 INFO L87 Difference]: Start difference. First operand 340 states and 474 transitions. Second operand has 40 states, 40 states have (on average 2.275) internal successors, (91), 40 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 06:36:55,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 06:36:55,765 INFO L93 Difference]: Finished difference Result 1056 states and 1506 transitions. [2023-12-20 06:36:55,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2023-12-20 06:36:55,765 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.275) internal successors, (91), 40 states have internal predecessors, (91), 0 states have call successors, (0), 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 251 [2023-12-20 06:36:55,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 06:36:55,768 INFO L225 Difference]: With dead ends: 1056 [2023-12-20 06:36:55,768 INFO L226 Difference]: Without dead ends: 740 [2023-12-20 06:36:55,773 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 647 GetRequests, 507 SyntacticMatches, 3 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5401 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=5738, Invalid=13444, Unknown=0, NotChecked=0, Total=19182 [2023-12-20 06:36:55,774 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 2974 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 369 mSolverCounterSat, 467 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2974 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 836 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 467 IncrementalHoareTripleChecker+Valid, 369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-20 06:36:55,774 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2974 Valid, 221 Invalid, 836 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [467 Valid, 369 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-20 06:36:55,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 740 states. [2023-12-20 06:36:55,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 740 to 664. [2023-12-20 06:36:55,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 664 states, 663 states have (on average 1.4223227752639518) internal successors, (943), 663 states have internal predecessors, (943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 06:36:55,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 943 transitions. [2023-12-20 06:36:55,793 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 943 transitions. Word has length 251 [2023-12-20 06:36:55,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 06:36:55,793 INFO L495 AbstractCegarLoop]: Abstraction has 664 states and 943 transitions. [2023-12-20 06:36:55,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.275) internal successors, (91), 40 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 06:36:55,793 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 943 transitions. [2023-12-20 06:36:55,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2023-12-20 06:36:55,795 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 06:36:55,795 INFO L195 NwaCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 06:36:55,804 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-20 06:36:56,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 06:36:56,001 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 06:36:56,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 06:36:56,001 INFO L85 PathProgramCache]: Analyzing trace with hash -1075608353, now seen corresponding path program 1 times [2023-12-20 06:36:56,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 06:36:56,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055792936] [2023-12-20 06:36:56,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 06:36:56,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 06:36:56,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 06:36:56,855 INFO L134 CoverageAnalysis]: Checked inductivity of 3375 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 3050 trivial. 0 not checked. [2023-12-20 06:36:56,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 06:36:56,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055792936] [2023-12-20 06:36:56,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055792936] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 06:36:56,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165441657] [2023-12-20 06:36:56,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 06:36:56,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 06:36:56,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 06:36:56,856 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 06:36:56,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-20 06:36:57,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 06:36:57,068 INFO L262 TraceCheckSpWp]: Trace formula consists of 980 conjuncts, 27 conjunts are in the unsatisfiable core [2023-12-20 06:36:57,071 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 06:36:57,105 INFO L134 CoverageAnalysis]: Checked inductivity of 3375 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 3050 trivial. 0 not checked. [2023-12-20 06:36:57,105 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 06:36:57,815 INFO L134 CoverageAnalysis]: Checked inductivity of 3375 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 3050 trivial. 0 not checked. [2023-12-20 06:36:57,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165441657] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 06:36:57,815 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 06:36:57,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 54 [2023-12-20 06:36:57,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736947656] [2023-12-20 06:36:57,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 06:36:57,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2023-12-20 06:36:57,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 06:36:57,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2023-12-20 06:36:57,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2023-12-20 06:36:57,818 INFO L87 Difference]: Start difference. First operand 664 states and 943 transitions. Second operand has 55 states, 55 states have (on average 1.3454545454545455) internal successors, (74), 54 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) [2023-12-20 06:36:58,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 06:36:58,842 INFO L93 Difference]: Finished difference Result 2337 states and 3326 transitions. [2023-12-20 06:36:58,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2023-12-20 06:36:58,843 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.3454545454545455) internal successors, (74), 54 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 284 [2023-12-20 06:36:58,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 06:36:58,851 INFO L225 Difference]: With dead ends: 2337 [2023-12-20 06:36:58,851 INFO L226 Difference]: Without dead ends: 1700 [2023-12-20 06:36:58,852 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 593 GetRequests, 540 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2023-12-20 06:36:58,852 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 2236 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 539 mSolverCounterSat, 401 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2236 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 940 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 401 IncrementalHoareTripleChecker+Valid, 539 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-20 06:36:58,853 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2236 Valid, 335 Invalid, 940 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [401 Valid, 539 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-20 06:36:58,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1700 states. [2023-12-20 06:36:58,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1700 to 1366. [2023-12-20 06:36:58,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1366 states, 1365 states have (on average 1.4227106227106228) internal successors, (1942), 1365 states have internal predecessors, (1942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 06:36:58,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1366 states to 1366 states and 1942 transitions. [2023-12-20 06:36:58,877 INFO L78 Accepts]: Start accepts. Automaton has 1366 states and 1942 transitions. Word has length 284 [2023-12-20 06:36:58,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 06:36:58,877 INFO L495 AbstractCegarLoop]: Abstraction has 1366 states and 1942 transitions. [2023-12-20 06:36:58,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.3454545454545455) internal successors, (74), 54 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) [2023-12-20 06:36:58,877 INFO L276 IsEmpty]: Start isEmpty. Operand 1366 states and 1942 transitions. [2023-12-20 06:36:58,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 582 [2023-12-20 06:36:58,883 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 06:36:58,883 INFO L195 NwaCegarLoop]: trace histogram [52, 52, 52, 52, 52, 52, 52, 52, 52, 52, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 06:36:58,899 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-12-20 06:36:59,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 06:36:59,092 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 06:36:59,092 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 06:36:59,092 INFO L85 PathProgramCache]: Analyzing trace with hash -317933966, now seen corresponding path program 2 times [2023-12-20 06:36:59,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 06:36:59,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283716146] [2023-12-20 06:36:59,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 06:36:59,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 06:36:59,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 06:37:01,909 INFO L134 CoverageAnalysis]: Checked inductivity of 14742 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 13364 trivial. 0 not checked. [2023-12-20 06:37:01,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 06:37:01,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283716146] [2023-12-20 06:37:01,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283716146] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 06:37:01,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528756129] [2023-12-20 06:37:01,910 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-20 06:37:01,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 06:37:01,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 06:37:01,911 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 06:37:01,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-20 06:37:02,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-20 06:37:02,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 06:37:02,270 INFO L262 TraceCheckSpWp]: Trace formula consists of 1979 conjuncts, 54 conjunts are in the unsatisfiable core [2023-12-20 06:37:02,276 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 06:37:02,370 INFO L134 CoverageAnalysis]: Checked inductivity of 14742 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 13364 trivial. 0 not checked. [2023-12-20 06:37:02,371 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 06:37:04,870 INFO L134 CoverageAnalysis]: Checked inductivity of 14742 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 13364 trivial. 0 not checked. [2023-12-20 06:37:04,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528756129] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 06:37:04,871 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 06:37:04,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54, 54] total 108 [2023-12-20 06:37:04,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286225873] [2023-12-20 06:37:04,871 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 06:37:04,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2023-12-20 06:37:04,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 06:37:04,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2023-12-20 06:37:04,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5886, Invalid=5886, Unknown=0, NotChecked=0, Total=11772 [2023-12-20 06:37:04,876 INFO L87 Difference]: Start difference. First operand 1366 states and 1942 transitions. Second operand has 109 states, 109 states have (on average 1.1743119266055047) internal successors, (128), 108 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 06:37:11,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 06:37:11,267 INFO L93 Difference]: Finished difference Result 4740 states and 6755 transitions. [2023-12-20 06:37:11,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2023-12-20 06:37:11,267 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 109 states have (on average 1.1743119266055047) internal successors, (128), 108 states have internal predecessors, (128), 0 states have call successors, (0), 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 581 [2023-12-20 06:37:11,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 06:37:11,277 INFO L225 Difference]: With dead ends: 4740 [2023-12-20 06:37:11,277 INFO L226 Difference]: Without dead ends: 3428 [2023-12-20 06:37:11,281 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1214 GetRequests, 1107 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=5886, Invalid=5886, Unknown=0, NotChecked=0, Total=11772 [2023-12-20 06:37:11,282 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 5174 mSDsluCounter, 645 mSDsCounter, 0 mSdLazyCounter, 1079 mSolverCounterSat, 907 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5174 SdHoareTripleChecker+Valid, 659 SdHoareTripleChecker+Invalid, 1986 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 907 IncrementalHoareTripleChecker+Valid, 1079 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-12-20 06:37:11,282 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5174 Valid, 659 Invalid, 1986 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [907 Valid, 1079 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-12-20 06:37:11,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3428 states. [2023-12-20 06:37:11,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3428 to 2770. [2023-12-20 06:37:11,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2770 states, 2769 states have (on average 1.4228963524738172) internal successors, (3940), 2769 states have internal predecessors, (3940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 06:37:11,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2770 states to 2770 states and 3940 transitions. [2023-12-20 06:37:11,340 INFO L78 Accepts]: Start accepts. Automaton has 2770 states and 3940 transitions. Word has length 581 [2023-12-20 06:37:11,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 06:37:11,341 INFO L495 AbstractCegarLoop]: Abstraction has 2770 states and 3940 transitions. [2023-12-20 06:37:11,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 109 states have (on average 1.1743119266055047) internal successors, (128), 108 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 06:37:11,341 INFO L276 IsEmpty]: Start isEmpty. Operand 2770 states and 3940 transitions. [2023-12-20 06:37:11,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1176 [2023-12-20 06:37:11,368 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 06:37:11,368 INFO L195 NwaCegarLoop]: trace histogram [106, 106, 106, 106, 106, 106, 106, 106, 106, 106, 105, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 06:37:11,378 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-12-20 06:37:11,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 06:37:11,581 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 06:37:11,581 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 06:37:11,581 INFO L85 PathProgramCache]: Analyzing trace with hash -770846126, now seen corresponding path program 3 times [2023-12-20 06:37:11,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 06:37:11,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179222676] [2023-12-20 06:37:11,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 06:37:11,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 06:37:11,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 06:37:22,444 INFO L134 CoverageAnalysis]: Checked inductivity of 61533 backedges. 0 proven. 5671 refuted. 0 times theorem prover too weak. 55862 trivial. 0 not checked. [2023-12-20 06:37:22,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 06:37:22,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179222676] [2023-12-20 06:37:22,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179222676] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 06:37:22,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73669554] [2023-12-20 06:37:22,445 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-20 06:37:22,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 06:37:22,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 06:37:22,446 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) [2023-12-20 06:37:22,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-20 06:37:22,817 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-12-20 06:37:22,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 06:37:22,821 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 21 conjunts are in the unsatisfiable core [2023-12-20 06:37:22,844 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 06:37:22,904 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 11 [2023-12-20 06:37:23,044 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 0 case distinctions, treesize of input 28 treesize of output 27 [2023-12-20 06:37:25,060 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 06:37:25,060 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 36 [2023-12-20 06:37:25,518 INFO L134 CoverageAnalysis]: Checked inductivity of 61533 backedges. 630 proven. 1362 refuted. 0 times theorem prover too weak. 59541 trivial. 0 not checked. [2023-12-20 06:37:25,519 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 06:37:27,148 INFO L134 CoverageAnalysis]: Checked inductivity of 61533 backedges. 523 proven. 1363 refuted. 0 times theorem prover too weak. 59647 trivial. 0 not checked. [2023-12-20 06:37:27,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73669554] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 06:37:27,148 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 06:37:27,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [108, 14, 12] total 129 [2023-12-20 06:37:27,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412262464] [2023-12-20 06:37:27,149 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 06:37:27,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 129 states [2023-12-20 06:37:27,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 06:37:27,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2023-12-20 06:37:27,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7371, Invalid=9141, Unknown=0, NotChecked=0, Total=16512 [2023-12-20 06:37:27,154 INFO L87 Difference]: Start difference. First operand 2770 states and 3940 transitions. Second operand has 129 states, 129 states have (on average 1.426356589147287) internal successors, (184), 129 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 06:39:04,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 06:39:04,776 INFO L93 Difference]: Finished difference Result 8806 states and 12541 transitions. [2023-12-20 06:39:04,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 787 states. [2023-12-20 06:39:04,777 INFO L78 Accepts]: Start accepts. Automaton has has 129 states, 129 states have (on average 1.426356589147287) internal successors, (184), 129 states have internal predecessors, (184), 0 states have call successors, (0), 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 1175 [2023-12-20 06:39:04,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 06:39:04,800 INFO L225 Difference]: With dead ends: 8806 [2023-12-20 06:39:04,801 INFO L226 Difference]: Without dead ends: 6144 [2023-12-20 06:39:04,847 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3239 GetRequests, 2436 SyntacticMatches, 3 SemanticMatches, 800 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240490 ImplicationChecksByTransitivity, 54.4s TimeCoverageRelationStatistics Valid=124824, Invalid=517576, Unknown=2, NotChecked=0, Total=642402 [2023-12-20 06:39:04,848 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 21210 mSDsluCounter, 761 mSDsCounter, 0 mSdLazyCounter, 1330 mSolverCounterSat, 4312 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21210 SdHoareTripleChecker+Valid, 772 SdHoareTripleChecker+Invalid, 5642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4312 IncrementalHoareTripleChecker+Valid, 1330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2023-12-20 06:39:04,848 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21210 Valid, 772 Invalid, 5642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4312 Valid, 1330 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2023-12-20 06:39:04,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6144 states. [2023-12-20 06:39:04,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6144 to 5310. [2023-12-20 06:39:04,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5310 states, 5309 states have (on average 1.437182143529855) internal successors, (7630), 5309 states have internal predecessors, (7630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 06:39:04,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5310 states to 5310 states and 7630 transitions. [2023-12-20 06:39:04,983 INFO L78 Accepts]: Start accepts. Automaton has 5310 states and 7630 transitions. Word has length 1175 [2023-12-20 06:39:04,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 06:39:04,983 INFO L495 AbstractCegarLoop]: Abstraction has 5310 states and 7630 transitions. [2023-12-20 06:39:04,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 129 states, 129 states have (on average 1.426356589147287) internal successors, (184), 129 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 06:39:04,983 INFO L276 IsEmpty]: Start isEmpty. Operand 5310 states and 7630 transitions. [2023-12-20 06:39:04,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1220 [2023-12-20 06:39:04,998 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 06:39:04,998 INFO L195 NwaCegarLoop]: trace histogram [110, 110, 110, 110, 110, 110, 110, 110, 110, 110, 108, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 06:39:05,006 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-12-20 06:39:05,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 06:39:05,205 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 06:39:05,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 06:39:05,206 INFO L85 PathProgramCache]: Analyzing trace with hash -1755821744, now seen corresponding path program 4 times [2023-12-20 06:39:05,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 06:39:05,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64125779] [2023-12-20 06:39:05,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 06:39:05,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 06:39:05,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 06:39:17,168 INFO L134 CoverageAnalysis]: Checked inductivity of 66275 backedges. 0 proven. 6105 refuted. 0 times theorem prover too weak. 60170 trivial. 0 not checked. [2023-12-20 06:39:17,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 06:39:17,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64125779] [2023-12-20 06:39:17,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64125779] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 06:39:17,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200568564] [2023-12-20 06:39:17,169 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-20 06:39:17,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 06:39:17,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 06:39:17,170 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) [2023-12-20 06:39:17,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-20 06:39:17,734 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-20 06:39:17,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 06:39:17,749 INFO L262 TraceCheckSpWp]: Trace formula consists of 2321 conjuncts, 454 conjunts are in the unsatisfiable core [2023-12-20 06:39:17,766 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 06:39:21,617 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 [2023-12-20 06:39:21,782 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 23 treesize of output 22 [2023-12-20 06:39:21,962 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 06:39:21,962 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 1 case distinctions, treesize of input 32 treesize of output 34 [2023-12-20 06:39:37,831 INFO L134 CoverageAnalysis]: Checked inductivity of 66275 backedges. 2040 proven. 58113 refuted. 0 times theorem prover too weak. 6122 trivial. 0 not checked. [2023-12-20 06:39:37,832 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 06:39:59,304 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 66 treesize of output 62 [2023-12-20 06:39:59,315 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 06:39:59,315 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 30 [2023-12-20 06:40:20,529 INFO L134 CoverageAnalysis]: Checked inductivity of 66275 backedges. 546 proven. 59624 refuted. 0 times theorem prover too weak. 6105 trivial. 0 not checked. [2023-12-20 06:40:20,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200568564] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 06:40:20,530 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 06:40:20,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [112, 224, 228] total 560 [2023-12-20 06:40:20,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242309469] [2023-12-20 06:40:20,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 06:40:20,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 560 states [2023-12-20 06:40:20,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 06:40:20,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 560 interpolants. [2023-12-20 06:40:20,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27527, Invalid=285513, Unknown=0, NotChecked=0, Total=313040 [2023-12-20 06:40:20,553 INFO L87 Difference]: Start difference. First operand 5310 states and 7630 transitions. Second operand has 560 states, 560 states have (on average 4.1375) internal successors, (2317), 560 states have internal predecessors, (2317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2023-12-20 06:49:35,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 1982 states. [2023-12-20 06:49:35,598 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-20 06:49:35,599 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 [2023-12-20 06:49:35,952 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4369 GetRequests, 1990 SyntacticMatches, 0 SemanticMatches, 2378 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2094183 ImplicationChecksByTransitivity, 421.2s TimeCoverageRelationStatistics Valid=232539, Invalid=5429481, Unknown=0, NotChecked=0, Total=5662020 [2023-12-20 06:49:35,953 INFO L413 NwaCegarLoop]: 1128 mSDtfsCounter, 8225 mSDsluCounter, 269563 mSDsCounter, 0 mSdLazyCounter, 500326 mSolverCounterSat, 1119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 132.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8225 SdHoareTripleChecker+Valid, 270691 SdHoareTripleChecker+Invalid, 501445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.7s SdHoareTripleChecker+Time, 1119 IncrementalHoareTripleChecker+Valid, 500326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 156.4s IncrementalHoareTripleChecker+Time [2023-12-20 06:49:35,953 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8225 Valid, 270691 Invalid, 501445 Unknown, 0 Unchecked, 1.7s Time], IncrementalHoareTripleChecker [1119 Valid, 500326 Invalid, 0 Unknown, 0 Unchecked, 156.4s Time] [2023-12-20 06:49:35,954 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-20 06:49:35,964 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-12-20 06:49:36,159 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,SelfDestructingSolverStorable10 [2023-12-20 06:49:36,160 WARN L619 AbstractCegarLoop]: Verification canceled: while NwaCegarLoop was constructing difference of abstraction (5310states) and FLOYD_HOARE automaton (currently 1982 states, 560 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 2380 known predicates. [2023-12-20 06:49:36,164 INFO L445 BasicCegarLoop]: Path program histogram: [4, 3, 2, 1, 1] [2023-12-20 06:49:36,165 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-12-20 06:49:36,167 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.12 06:49:36 BoogieIcfgContainer [2023-12-20 06:49:36,167 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-20 06:49:36,167 INFO L158 Benchmark]: Toolchain (without parser) took 768434.08ms. Allocated memory was 240.1MB in the beginning and 7.3GB in the end (delta: 7.1GB). Free memory was 193.8MB in the beginning and 6.0GB in the end (delta: -5.8GB). Peak memory consumption was 1.5GB. Max. memory is 8.0GB. [2023-12-20 06:49:36,167 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 199.2MB. Free memory was 145.8MB in the beginning and 145.6MB in the end (delta: 194.5kB). There was no memory consumed. Max. memory is 8.0GB. [2023-12-20 06:49:36,167 INFO L158 Benchmark]: CACSL2BoogieTranslator took 149.52ms. Allocated memory is still 240.1MB. Free memory was 193.8MB in the beginning and 182.8MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2023-12-20 06:49:36,168 INFO L158 Benchmark]: Boogie Procedure Inliner took 26.55ms. Allocated memory is still 240.1MB. Free memory was 182.8MB in the beginning and 181.2MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-20 06:49:36,168 INFO L158 Benchmark]: Boogie Preprocessor took 26.11ms. Allocated memory is still 240.1MB. Free memory was 181.2MB in the beginning and 179.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-20 06:49:36,168 INFO L158 Benchmark]: RCFGBuilder took 224.79ms. Allocated memory is still 240.1MB. Free memory was 179.1MB in the beginning and 165.5MB in the end (delta: 13.6MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. [2023-12-20 06:49:36,168 INFO L158 Benchmark]: TraceAbstraction took 768002.18ms. Allocated memory was 240.1MB in the beginning and 7.3GB in the end (delta: 7.1GB). Free memory was 165.0MB in the beginning and 6.0GB in the end (delta: -5.8GB). Peak memory consumption was 1.4GB. Max. memory is 8.0GB. [2023-12-20 06:49:36,169 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 199.2MB. Free memory was 145.8MB in the beginning and 145.6MB in the end (delta: 194.5kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 149.52ms. Allocated memory is still 240.1MB. Free memory was 193.8MB in the beginning and 182.8MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 26.55ms. Allocated memory is still 240.1MB. Free memory was 182.8MB in the beginning and 181.2MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 26.11ms. Allocated memory is still 240.1MB. Free memory was 181.2MB in the beginning and 179.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 224.79ms. Allocated memory is still 240.1MB. Free memory was 179.1MB in the beginning and 165.5MB in the end (delta: 13.6MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. * TraceAbstraction took 768002.18ms. Allocated memory was 240.1MB in the beginning and 7.3GB in the end (delta: 7.1GB). Free memory was 165.0MB in the beginning and 6.0GB in the end (delta: -5.8GB). Peak memory consumption was 1.4GB. 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: 13]: Timeout (TraceAbstraction) Unable to prove that a call to reach_error is unreachable (line 13). Cancelled while NwaCegarLoop was constructing difference of abstraction (5310states) and FLOYD_HOARE automaton (currently 1982 states, 560 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 2380 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 768.0s, OverallIterations: 11, TraceHistogramMax: 110, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.1s, AutomataDifference: 663.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 40868 SdHoareTripleChecker+Valid, 161.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 40868 mSDsluCounter, 273080 SdHoareTripleChecker+Invalid, 136.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 271811 mSDsCounter, 7425 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 504202 IncrementalHoareTripleChecker+Invalid, 511627 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 7425 mSolverCounterUnsat, 1269 mSDtfsCounter, 504202 mSolverCounterSat, 1.8s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 10475 GetRequests, 6945 SyntacticMatches, 6 SemanticMatches, 3523 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2340444 ImplicationChecksByTransitivity, 482.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=5310occurred in iteration=10, InterpolantAutomatonStates: 1112, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 10 MinimizatonAttempts, 1938 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.6s SsaConstructionTime, 1.2s SatisfiabilityAnalysisTime, 99.2s InterpolantComputationTime, 7519 NumberOfCodeBlocks, 5837 NumberOfCodeBlocksAsserted, 26 NumberOfCheckSat, 11194 ConstructedInterpolants, 2 QuantifiedInterpolants, 81133 SizeOfPredicates, 22 NumberOfNonLiveVariables, 6353 ConjunctsInSsa, 596 ConjunctsInUnsatCore, 27 InterpolantComputations, 3 PerfectInterpolantSequences, 309497/447570 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