/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.use.bitabs.translation true -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/array-examples/standard_two_index_01.i -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-18 17:32:04,578 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-18 17:32:04,645 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-12-18 17:32:04,650 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-18 17:32:04,651 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-18 17:32:04,672 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-18 17:32:04,673 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-18 17:32:04,673 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-18 17:32:04,673 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-18 17:32:04,676 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-18 17:32:04,676 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-18 17:32:04,677 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-18 17:32:04,677 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-18 17:32:04,678 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-18 17:32:04,678 INFO L153 SettingsManager]: * Use SBE=true [2023-12-18 17:32:04,678 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-18 17:32:04,678 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-18 17:32:04,678 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-18 17:32:04,678 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-18 17:32:04,679 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-18 17:32:04,680 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-18 17:32:04,680 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-18 17:32:04,680 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-18 17:32:04,680 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-18 17:32:04,680 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-18 17:32:04,680 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-18 17:32:04,681 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-18 17:32:04,681 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-18 17:32:04,681 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-18 17:32:04,681 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-18 17:32:04,682 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-18 17:32:04,682 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-18 17:32:04,682 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-18 17:32:04,682 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-18 17:32:04,682 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-18 17:32:04,682 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-18 17:32:04,683 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-18 17:32:04,683 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-18 17:32:04,683 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-18 17:32:04,683 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-18 17:32:04,683 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-18 17:32:04,684 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-18 17:32:04,684 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-18 17:32:04,684 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> true [2023-12-18 17:32:04,878 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-18 17:32:04,898 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-18 17:32:04,900 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-18 17:32:04,900 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-18 17:32:04,901 INFO L274 PluginConnector]: CDTParser initialized [2023-12-18 17:32:04,902 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_two_index_01.i [2023-12-18 17:32:05,892 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-18 17:32:06,070 INFO L384 CDTParser]: Found 1 translation units. [2023-12-18 17:32:06,071 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_two_index_01.i [2023-12-18 17:32:06,079 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/490586262/49301a3c9de14f6f8b3f4df446ce1262/FLAG89232685e [2023-12-18 17:32:06,480 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/490586262/49301a3c9de14f6f8b3f4df446ce1262 [2023-12-18 17:32:06,482 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-18 17:32:06,483 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-18 17:32:06,485 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-18 17:32:06,485 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-18 17:32:06,488 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-18 17:32:06,489 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 05:32:06" (1/1) ... [2023-12-18 17:32:06,489 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2781d1a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 05:32:06, skipping insertion in model container [2023-12-18 17:32:06,489 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 05:32:06" (1/1) ... [2023-12-18 17:32:06,504 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-18 17:32:06,590 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_two_index_01.i[814,827] [2023-12-18 17:32:06,606 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-18 17:32:06,613 INFO L202 MainTranslator]: Completed pre-run [2023-12-18 17:32:06,620 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_two_index_01.i[814,827] [2023-12-18 17:32:06,624 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-18 17:32:06,633 INFO L206 MainTranslator]: Completed translation [2023-12-18 17:32:06,633 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 05:32:06 WrapperNode [2023-12-18 17:32:06,633 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-18 17:32:06,634 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-18 17:32:06,634 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-18 17:32:06,634 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-18 17:32:06,638 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 05:32:06" (1/1) ... [2023-12-18 17:32:06,645 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 05:32:06" (1/1) ... [2023-12-18 17:32:06,664 INFO L138 Inliner]: procedures = 16, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 59 [2023-12-18 17:32:06,664 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-18 17:32:06,664 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-18 17:32:06,665 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-18 17:32:06,665 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-18 17:32:06,671 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 05:32:06" (1/1) ... [2023-12-18 17:32:06,671 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 05:32:06" (1/1) ... [2023-12-18 17:32:06,673 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 05:32:06" (1/1) ... [2023-12-18 17:32:06,683 INFO L175 MemorySlicer]: Split 7 memory accesses to 3 slices as follows [2, 3, 2]. 43 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 2 writes are split as follows [0, 1, 1]. [2023-12-18 17:32:06,683 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 05:32:06" (1/1) ... [2023-12-18 17:32:06,683 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 05:32:06" (1/1) ... [2023-12-18 17:32:06,686 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 05:32:06" (1/1) ... [2023-12-18 17:32:06,688 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 05:32:06" (1/1) ... [2023-12-18 17:32:06,688 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 05:32:06" (1/1) ... [2023-12-18 17:32:06,689 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 05:32:06" (1/1) ... [2023-12-18 17:32:06,690 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-18 17:32:06,690 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-18 17:32:06,690 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-18 17:32:06,691 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-18 17:32:06,691 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 05:32:06" (1/1) ... [2023-12-18 17:32:06,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-18 17:32:06,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 17:32:06,712 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-12-18 17:32:06,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-12-18 17:32:06,731 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-18 17:32:06,732 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-18 17:32:06,732 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-12-18 17:32:06,732 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-12-18 17:32:06,732 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-18 17:32:06,732 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-12-18 17:32:06,733 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-12-18 17:32:06,733 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-12-18 17:32:06,734 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-18 17:32:06,734 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-18 17:32:06,734 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-12-18 17:32:06,734 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-12-18 17:32:06,734 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-12-18 17:32:06,734 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-18 17:32:06,818 INFO L241 CfgBuilder]: Building ICFG [2023-12-18 17:32:06,819 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-18 17:32:06,898 INFO L282 CfgBuilder]: Performing block encoding [2023-12-18 17:32:06,913 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-18 17:32:06,913 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-12-18 17:32:06,913 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 05:32:06 BoogieIcfgContainer [2023-12-18 17:32:06,914 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-18 17:32:06,915 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-18 17:32:06,915 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-18 17:32:06,920 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-18 17:32:06,920 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.12 05:32:06" (1/3) ... [2023-12-18 17:32:06,921 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79f2f0f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 05:32:06, skipping insertion in model container [2023-12-18 17:32:06,921 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 05:32:06" (2/3) ... [2023-12-18 17:32:06,922 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79f2f0f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 05:32:06, skipping insertion in model container [2023-12-18 17:32:06,922 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 05:32:06" (3/3) ... [2023-12-18 17:32:06,923 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_two_index_01.i [2023-12-18 17:32:06,934 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-18 17:32:06,934 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-18 17:32:06,969 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-18 17:32:06,974 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;@6902aa53, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-18 17:32:06,974 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-18 17:32:06,976 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.8) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 17:32:06,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-12-18 17:32:06,984 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 17:32:06,985 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 17:32:06,985 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 17:32:06,989 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 17:32:06,989 INFO L85 PathProgramCache]: Analyzing trace with hash 1148868036, now seen corresponding path program 1 times [2023-12-18 17:32:06,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 17:32:06,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982111999] [2023-12-18 17:32:06,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 17:32:06,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 17:32:07,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 17:32:07,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 17:32:07,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 17:32:07,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982111999] [2023-12-18 17:32:07,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982111999] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-18 17:32:07,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-18 17:32:07,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-18 17:32:07,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750652727] [2023-12-18 17:32:07,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-18 17:32:07,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-18 17:32:07,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 17:32:07,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-18 17:32:07,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-18 17:32:07,217 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.8) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 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 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 17:32:07,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 17:32:07,278 INFO L93 Difference]: Finished difference Result 29 states and 46 transitions. [2023-12-18 17:32:07,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-18 17:32:07,280 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 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 8 [2023-12-18 17:32:07,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 17:32:07,285 INFO L225 Difference]: With dead ends: 29 [2023-12-18 17:32:07,285 INFO L226 Difference]: Without dead ends: 17 [2023-12-18 17:32:07,287 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 [2023-12-18 17:32:07,289 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 4 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 17:32:07,289 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 11 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 17:32:07,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-12-18 17:32:07,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 12. [2023-12-18 17:32:07,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 17:32:07,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2023-12-18 17:32:07,312 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 8 [2023-12-18 17:32:07,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 17:32:07,312 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2023-12-18 17:32:07,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 17:32:07,312 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2023-12-18 17:32:07,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-12-18 17:32:07,313 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 17:32:07,313 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 17:32:07,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-18 17:32:07,313 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 17:32:07,314 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 17:32:07,314 INFO L85 PathProgramCache]: Analyzing trace with hash 1317396867, now seen corresponding path program 1 times [2023-12-18 17:32:07,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 17:32:07,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397915398] [2023-12-18 17:32:07,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 17:32:07,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 17:32:07,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 17:32:07,428 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-18 17:32:07,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 17:32:07,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397915398] [2023-12-18 17:32:07,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397915398] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 17:32:07,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307863848] [2023-12-18 17:32:07,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 17:32:07,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 17:32:07,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 17:32:07,431 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 17:32:07,463 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-18 17:32:07,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 17:32:07,488 INFO L262 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-18 17:32:07,491 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 17:32:07,520 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-18 17:32:07,520 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 17:32:07,547 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-18 17:32:07,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307863848] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 17:32:07,549 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 17:32:07,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-12-18 17:32:07,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105732007] [2023-12-18 17:32:07,550 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 17:32:07,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-18 17:32:07,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 17:32:07,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-18 17:32:07,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-12-18 17:32:07,552 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 17:32:07,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 17:32:07,614 INFO L93 Difference]: Finished difference Result 43 states and 52 transitions. [2023-12-18 17:32:07,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-18 17:32:07,614 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-12-18 17:32:07,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 17:32:07,615 INFO L225 Difference]: With dead ends: 43 [2023-12-18 17:32:07,616 INFO L226 Difference]: Without dead ends: 34 [2023-12-18 17:32:07,616 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-12-18 17:32:07,618 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 20 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 17:32:07,618 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 19 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 17:32:07,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-12-18 17:32:07,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 18. [2023-12-18 17:32:07,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 17:32:07,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2023-12-18 17:32:07,627 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 10 [2023-12-18 17:32:07,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 17:32:07,628 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2023-12-18 17:32:07,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 17:32:07,628 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2023-12-18 17:32:07,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-12-18 17:32:07,629 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 17:32:07,629 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 17:32:07,636 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-18 17:32:07,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 17:32:07,835 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 17:32:07,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 17:32:07,835 INFO L85 PathProgramCache]: Analyzing trace with hash 494319364, now seen corresponding path program 2 times [2023-12-18 17:32:07,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 17:32:07,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364496912] [2023-12-18 17:32:07,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 17:32:07,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 17:32:07,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 17:32:08,005 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-18 17:32:08,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 17:32:08,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364496912] [2023-12-18 17:32:08,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364496912] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 17:32:08,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958086444] [2023-12-18 17:32:08,013 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-18 17:32:08,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 17:32:08,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 17:32:08,034 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 17:32:08,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-18 17:32:08,105 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-18 17:32:08,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 17:32:08,106 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-18 17:32:08,109 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 17:32:08,128 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-18 17:32:08,128 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 17:32:08,187 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-18 17:32:08,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958086444] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 17:32:08,187 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 17:32:08,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-12-18 17:32:08,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547294514] [2023-12-18 17:32:08,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 17:32:08,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-12-18 17:32:08,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 17:32:08,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-12-18 17:32:08,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-12-18 17:32:08,189 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 17:32:08,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 17:32:08,284 INFO L93 Difference]: Finished difference Result 88 states and 103 transitions. [2023-12-18 17:32:08,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-18 17:32:08,285 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-12-18 17:32:08,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 17:32:08,286 INFO L225 Difference]: With dead ends: 88 [2023-12-18 17:32:08,287 INFO L226 Difference]: Without dead ends: 76 [2023-12-18 17:32:08,287 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-12-18 17:32:08,289 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 68 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 17:32:08,290 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 37 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 17:32:08,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2023-12-18 17:32:08,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 30. [2023-12-18 17:32:08,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.103448275862069) internal successors, (32), 29 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 17:32:08,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2023-12-18 17:32:08,302 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 16 [2023-12-18 17:32:08,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 17:32:08,302 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2023-12-18 17:32:08,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 17:32:08,302 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2023-12-18 17:32:08,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-12-18 17:32:08,303 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 17:32:08,303 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 17:32:08,310 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-18 17:32:08,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-12-18 17:32:08,513 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 17:32:08,513 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 17:32:08,513 INFO L85 PathProgramCache]: Analyzing trace with hash -25725724, now seen corresponding path program 3 times [2023-12-18 17:32:08,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 17:32:08,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144461769] [2023-12-18 17:32:08,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 17:32:08,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 17:32:08,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 17:32:08,752 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-12-18 17:32:08,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 17:32:08,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144461769] [2023-12-18 17:32:08,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144461769] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 17:32:08,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875309225] [2023-12-18 17:32:08,756 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-18 17:32:08,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 17:32:08,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 17:32:08,772 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 17:32:08,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-18 17:32:09,034 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-12-18 17:32:09,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 17:32:09,036 INFO L262 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-18 17:32:09,038 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 17:32:09,058 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-12-18 17:32:09,058 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 17:32:09,247 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-12-18 17:32:09,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875309225] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 17:32:09,248 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 17:32:09,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 25 [2023-12-18 17:32:09,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213959979] [2023-12-18 17:32:09,248 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 17:32:09,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-12-18 17:32:09,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 17:32:09,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-12-18 17:32:09,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-12-18 17:32:09,249 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand has 25 states, 25 states have (on average 1.84) internal successors, (46), 25 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 17:32:09,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 17:32:09,445 INFO L93 Difference]: Finished difference Result 178 states and 205 transitions. [2023-12-18 17:32:09,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-12-18 17:32:09,446 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.84) internal successors, (46), 25 states have internal predecessors, (46), 0 states have call successors, (0), 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 28 [2023-12-18 17:32:09,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 17:32:09,447 INFO L225 Difference]: With dead ends: 178 [2023-12-18 17:32:09,447 INFO L226 Difference]: Without dead ends: 160 [2023-12-18 17:32:09,447 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-12-18 17:32:09,448 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 324 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-18 17:32:09,448 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [324 Valid, 73 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-18 17:32:09,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2023-12-18 17:32:09,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 54. [2023-12-18 17:32:09,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.0566037735849056) internal successors, (56), 53 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 17:32:09,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2023-12-18 17:32:09,453 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 28 [2023-12-18 17:32:09,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 17:32:09,454 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2023-12-18 17:32:09,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.84) internal successors, (46), 25 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 17:32:09,454 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2023-12-18 17:32:09,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-12-18 17:32:09,454 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 17:32:09,455 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 17:32:09,460 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-18 17:32:09,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 17:32:09,661 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 17:32:09,661 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 17:32:09,661 INFO L85 PathProgramCache]: Analyzing trace with hash -2032588636, now seen corresponding path program 4 times [2023-12-18 17:32:09,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 17:32:09,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734730947] [2023-12-18 17:32:09,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 17:32:09,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 17:32:09,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 17:32:10,277 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2023-12-18 17:32:10,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 17:32:10,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734730947] [2023-12-18 17:32:10,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734730947] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 17:32:10,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975290667] [2023-12-18 17:32:10,278 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-18 17:32:10,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 17:32:10,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 17:32:10,279 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 17:32:10,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-18 17:32:10,392 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-18 17:32:10,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 17:32:10,394 INFO L262 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 24 conjunts are in the unsatisfiable core [2023-12-18 17:32:10,396 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 17:32:10,448 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2023-12-18 17:32:10,448 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 17:32:11,076 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2023-12-18 17:32:11,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975290667] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 17:32:11,077 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 17:32:11,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 48 [2023-12-18 17:32:11,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045926160] [2023-12-18 17:32:11,077 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 17:32:11,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-12-18 17:32:11,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 17:32:11,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-12-18 17:32:11,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2023-12-18 17:32:11,079 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand has 49 states, 49 states have (on average 1.163265306122449) internal successors, (57), 48 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 17:32:11,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 17:32:11,491 INFO L93 Difference]: Finished difference Result 358 states and 409 transitions. [2023-12-18 17:32:11,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-12-18 17:32:11,491 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.163265306122449) internal successors, (57), 48 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2023-12-18 17:32:11,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 17:32:11,496 INFO L225 Difference]: With dead ends: 358 [2023-12-18 17:32:11,496 INFO L226 Difference]: Without dead ends: 328 [2023-12-18 17:32:11,497 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2023-12-18 17:32:11,497 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 644 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 348 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 644 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 348 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-18 17:32:11,498 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [644 Valid, 145 Invalid, 548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [348 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-18 17:32:11,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2023-12-18 17:32:11,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 102. [2023-12-18 17:32:11,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 1.0297029702970297) internal successors, (104), 101 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 17:32:11,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 104 transitions. [2023-12-18 17:32:11,515 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 104 transitions. Word has length 52 [2023-12-18 17:32:11,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 17:32:11,516 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 104 transitions. [2023-12-18 17:32:11,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.163265306122449) internal successors, (57), 48 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 17:32:11,516 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 104 transitions. [2023-12-18 17:32:11,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2023-12-18 17:32:11,517 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 17:32:11,518 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 17:32:11,523 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-18 17:32:11,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 17:32:11,723 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 17:32:11,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 17:32:11,723 INFO L85 PathProgramCache]: Analyzing trace with hash -260739036, now seen corresponding path program 5 times [2023-12-18 17:32:11,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 17:32:11,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045672951] [2023-12-18 17:32:11,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 17:32:11,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 17:32:11,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 17:32:13,505 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2023-12-18 17:32:13,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 17:32:13,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045672951] [2023-12-18 17:32:13,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045672951] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 17:32:13,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456896989] [2023-12-18 17:32:13,505 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-18 17:32:13,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 17:32:13,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 17:32:13,507 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 17:32:13,525 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process Received shutdown request... [2023-12-18 17:46:55,187 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-18 17:46:55,202 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-18 17:46:56,210 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 [2023-12-18 17:46:56,388 WARN L435 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forcibly destroying the process [2023-12-18 17:46:56,442 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 137 [2023-12-18 17:46:56,443 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-18 17:46:56,443 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-18 17:46:56,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2023-12-18 17:46:56,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237463826] [2023-12-18 17:46:56,443 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-18 17:46:56,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-12-18 17:46:56,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 17:46:56,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-12-18 17:46:56,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2023-12-18 17:46:56,445 INFO L87 Difference]: Start difference. First operand 102 states and 104 transitions. Second operand has 49 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 48 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 17:46:56,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-18 17:46:56,447 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2023-12-18 17:46:56,448 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 17:46:56,453 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 17:46:56,455 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-18 17:46:56,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-12-18 17:46:56,455 WARN L619 AbstractCegarLoop]: Verification canceled: while NwaCegarLoop was constructing difference of abstraction (102states) and FLOYD_HOARE automaton (currently 2 states, 49 states before enhancement),while ReachableStatesComputation was computing reachable states (1 states constructed, input type IntersectNwa). [2023-12-18 17:46:56,461 INFO L445 BasicCegarLoop]: Path program histogram: [5, 1] [2023-12-18 17:46:56,463 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-12-18 17:46:56,466 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.12 05:46:56 BoogieIcfgContainer [2023-12-18 17:46:56,466 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-18 17:46:56,466 INFO L158 Benchmark]: Toolchain (without parser) took 889983.77ms. Allocated memory was 218.1MB in the beginning and 337.6MB in the end (delta: 119.5MB). Free memory was 181.1MB in the beginning and 230.3MB in the end (delta: -49.1MB). Peak memory consumption was 71.8MB. Max. memory is 8.0GB. [2023-12-18 17:46:56,466 INFO L158 Benchmark]: CDTParser took 0.61ms. Allocated memory is still 218.1MB. Free memory is still 166.6MB. There was no memory consumed. Max. memory is 8.0GB. [2023-12-18 17:46:56,467 INFO L158 Benchmark]: CACSL2BoogieTranslator took 148.72ms. Allocated memory is still 218.1MB. Free memory was 181.0MB in the beginning and 170.0MB in the end (delta: 11.0MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-12-18 17:46:56,467 INFO L158 Benchmark]: Boogie Procedure Inliner took 30.13ms. Allocated memory is still 218.1MB. Free memory was 170.0MB in the beginning and 168.4MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-12-18 17:46:56,467 INFO L158 Benchmark]: Boogie Preprocessor took 25.50ms. Allocated memory is still 218.1MB. Free memory was 168.4MB in the beginning and 166.6MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-18 17:46:56,467 INFO L158 Benchmark]: RCFGBuilder took 223.21ms. Allocated memory is still 218.1MB. Free memory was 166.3MB in the beginning and 155.1MB in the end (delta: 11.2MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-12-18 17:46:56,467 INFO L158 Benchmark]: TraceAbstraction took 889551.12ms. Allocated memory was 218.1MB in the beginning and 337.6MB in the end (delta: 119.5MB). Free memory was 154.4MB in the beginning and 230.3MB in the end (delta: -75.9MB). Peak memory consumption was 44.6MB. Max. memory is 8.0GB. [2023-12-18 17:46:56,469 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.61ms. Allocated memory is still 218.1MB. Free memory is still 166.6MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 148.72ms. Allocated memory is still 218.1MB. Free memory was 181.0MB in the beginning and 170.0MB in the end (delta: 11.0MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 30.13ms. Allocated memory is still 218.1MB. Free memory was 170.0MB in the beginning and 168.4MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 25.50ms. Allocated memory is still 218.1MB. Free memory was 168.4MB in the beginning and 166.6MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 223.21ms. Allocated memory is still 218.1MB. Free memory was 166.3MB in the beginning and 155.1MB in the end (delta: 11.2MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * TraceAbstraction took 889551.12ms. Allocated memory was 218.1MB in the beginning and 337.6MB in the end (delta: 119.5MB). Free memory was 154.4MB in the beginning and 230.3MB in the end (delta: -75.9MB). Peak memory consumption was 44.6MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 13]: Timeout (TraceAbstraction) Unable to prove that a call to reach_error is unreachable (line 13). Cancelled while NwaCegarLoop was constructing difference of abstraction (102states) and FLOYD_HOARE automaton (currently 2 states, 49 states before enhancement),while ReachableStatesComputation was computing reachable states (1 states constructed, input type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 12 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 889.5s, OverallIterations: 6, TraceHistogramMax: 46, PathProgramHistogramMax: 5, EmptinessCheckTime: 0.0s, AutomataDifference: 0.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1060 SdHoareTripleChecker+Valid, 0.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1060 mSDsluCounter, 285 SdHoareTripleChecker+Invalid, 0.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 249 mSDsCounter, 533 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 400 IncrementalHoareTripleChecker+Invalid, 933 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 533 mSolverCounterUnsat, 36 mSDtfsCounter, 400 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 299 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 1.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=102occurred in iteration=5, InterpolantAutomatonStates: 93, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 5 MinimizatonAttempts, 399 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 3.8s InterpolantComputationTime, 320 NumberOfCodeBlocks, 320 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 412 ConstructedInterpolants, 0 QuantifiedInterpolants, 754 SizeOfPredicates, 0 NumberOfNonLiveVariables, 918 ConjunctsInSsa, 45 ConjunctsInUnsatCore, 14 InterpolantComputations, 1 PerfectInterpolantSequences, 2038/4076 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