/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/reducercommutativity/avg05-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-16 00:06:17,921 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-16 00:06:18,002 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-12-16 00:06:18,008 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-16 00:06:18,009 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-16 00:06:18,043 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-16 00:06:18,043 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-16 00:06:18,044 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-16 00:06:18,044 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-16 00:06:18,048 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-16 00:06:18,048 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-16 00:06:18,049 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-16 00:06:18,049 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-16 00:06:18,050 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-16 00:06:18,051 INFO L153 SettingsManager]: * Use SBE=true [2023-12-16 00:06:18,051 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-16 00:06:18,051 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-16 00:06:18,051 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-16 00:06:18,051 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-16 00:06:18,052 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-16 00:06:18,052 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-16 00:06:18,052 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-16 00:06:18,052 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-16 00:06:18,053 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-16 00:06:18,053 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-16 00:06:18,053 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-16 00:06:18,053 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-16 00:06:18,053 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-16 00:06:18,054 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-16 00:06:18,054 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-16 00:06:18,055 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-16 00:06:18,055 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-16 00:06:18,055 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-16 00:06:18,055 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-16 00:06:18,056 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-16 00:06:18,056 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-16 00:06:18,056 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-16 00:06:18,056 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-16 00:06:18,056 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-16 00:06:18,056 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-16 00:06:18,056 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-16 00:06:18,057 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-16 00:06:18,057 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-16 00:06:18,057 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> false [2023-12-16 00:06:18,276 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-16 00:06:18,295 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-16 00:06:18,299 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-16 00:06:18,300 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-16 00:06:18,300 INFO L274 PluginConnector]: CDTParser initialized [2023-12-16 00:06:18,301 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/avg05-1.i [2023-12-16 00:06:19,478 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-16 00:06:19,635 INFO L384 CDTParser]: Found 1 translation units. [2023-12-16 00:06:19,635 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/avg05-1.i [2023-12-16 00:06:19,640 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/491d7296e/3a60bc6671bf41979c3d2a994ecfe686/FLAG18385ff06 [2023-12-16 00:06:19,650 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/491d7296e/3a60bc6671bf41979c3d2a994ecfe686 [2023-12-16 00:06:19,651 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-16 00:06:19,652 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-16 00:06:19,653 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-16 00:06:19,653 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-16 00:06:19,657 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-16 00:06:19,658 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 12:06:19" (1/1) ... [2023-12-16 00:06:19,658 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70f668cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:06:19, skipping insertion in model container [2023-12-16 00:06:19,659 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 12:06:19" (1/1) ... [2023-12-16 00:06:19,679 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-16 00:06:19,816 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/avg05-1.i[1275,1288] [2023-12-16 00:06:19,819 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-16 00:06:19,827 INFO L202 MainTranslator]: Completed pre-run [2023-12-16 00:06:19,844 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/avg05-1.i[1275,1288] [2023-12-16 00:06:19,845 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-16 00:06:19,857 INFO L206 MainTranslator]: Completed translation [2023-12-16 00:06:19,858 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:06:19 WrapperNode [2023-12-16 00:06:19,858 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-16 00:06:19,859 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-16 00:06:19,859 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-16 00:06:19,859 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-16 00:06:19,864 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:06:19" (1/1) ... [2023-12-16 00:06:19,870 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:06:19" (1/1) ... [2023-12-16 00:06:19,885 INFO L138 Inliner]: procedures = 16, calls = 22, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 69 [2023-12-16 00:06:19,886 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-16 00:06:19,886 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-16 00:06:19,887 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-16 00:06:19,887 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-16 00:06:19,895 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:06:19" (1/1) ... [2023-12-16 00:06:19,895 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:06:19" (1/1) ... [2023-12-16 00:06:19,897 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:06:19" (1/1) ... [2023-12-16 00:06:19,915 INFO L175 MemorySlicer]: Split 12 memory accesses to 2 slices as follows [2, 10]. 83 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 5 writes are split as follows [0, 5]. [2023-12-16 00:06:19,915 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:06:19" (1/1) ... [2023-12-16 00:06:19,915 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:06:19" (1/1) ... [2023-12-16 00:06:19,920 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:06:19" (1/1) ... [2023-12-16 00:06:19,923 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:06:19" (1/1) ... [2023-12-16 00:06:19,924 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:06:19" (1/1) ... [2023-12-16 00:06:19,925 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:06:19" (1/1) ... [2023-12-16 00:06:19,929 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-16 00:06:19,930 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-16 00:06:19,930 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-16 00:06:19,930 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-16 00:06:19,931 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:06:19" (1/1) ... [2023-12-16 00:06:19,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-16 00:06:19,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 00:06:19,966 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) [2023-12-16 00:06:19,996 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 [2023-12-16 00:06:20,003 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-16 00:06:20,003 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-16 00:06:20,004 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-12-16 00:06:20,004 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-16 00:06:20,004 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-12-16 00:06:20,004 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-12-16 00:06:20,005 INFO L130 BoogieDeclarations]: Found specification of procedure avg [2023-12-16 00:06:20,006 INFO L138 BoogieDeclarations]: Found implementation of procedure avg [2023-12-16 00:06:20,006 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-16 00:06:20,006 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-16 00:06:20,006 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-12-16 00:06:20,006 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-12-16 00:06:20,006 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-16 00:06:20,100 INFO L241 CfgBuilder]: Building ICFG [2023-12-16 00:06:20,103 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-16 00:06:20,285 INFO L282 CfgBuilder]: Performing block encoding [2023-12-16 00:06:20,329 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-16 00:06:20,329 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-12-16 00:06:20,329 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 12:06:20 BoogieIcfgContainer [2023-12-16 00:06:20,330 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-16 00:06:20,331 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-16 00:06:20,331 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-16 00:06:20,339 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-16 00:06:20,339 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.12 12:06:19" (1/3) ... [2023-12-16 00:06:20,340 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@475a4d8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 12:06:20, skipping insertion in model container [2023-12-16 00:06:20,341 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:06:19" (2/3) ... [2023-12-16 00:06:20,341 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@475a4d8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 12:06:20, skipping insertion in model container [2023-12-16 00:06:20,342 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 12:06:20" (3/3) ... [2023-12-16 00:06:20,343 INFO L112 eAbstractionObserver]: Analyzing ICFG avg05-1.i [2023-12-16 00:06:20,359 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-16 00:06:20,359 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-16 00:06:20,412 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-16 00:06:20,419 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;@776f990a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-16 00:06:20,419 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-16 00:06:20,424 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 15 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-16 00:06:20,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-12-16 00:06:20,435 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 00:06:20,436 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 00:06:20,437 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 00:06:20,443 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 00:06:20,443 INFO L85 PathProgramCache]: Analyzing trace with hash -1444276640, now seen corresponding path program 1 times [2023-12-16 00:06:20,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 00:06:20,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353638950] [2023-12-16 00:06:20,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 00:06:20,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 00:06:20,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 00:06:20,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-16 00:06:20,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 00:06:20,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-16 00:06:20,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 00:06:20,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-12-16 00:06:20,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 00:06:20,819 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-16 00:06:20,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 00:06:20,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353638950] [2023-12-16 00:06:20,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353638950] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-16 00:06:20,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864470044] [2023-12-16 00:06:20,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 00:06:20,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 00:06:20,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 00:06:20,824 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) [2023-12-16 00:06:20,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-16 00:06:20,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 00:06:20,933 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 1 conjunts are in the unsatisfiable core [2023-12-16 00:06:20,938 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 00:06:20,951 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-16 00:06:20,952 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-16 00:06:20,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864470044] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-16 00:06:20,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-16 00:06:20,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 4 [2023-12-16 00:06:20,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425834600] [2023-12-16 00:06:20,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-16 00:06:20,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-16 00:06:20,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 00:06:20,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-16 00:06:20,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-16 00:06:20,995 INFO L87 Difference]: Start difference. First operand has 20 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 15 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-16 00:06:21,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 00:06:21,027 INFO L93 Difference]: Finished difference Result 38 states and 55 transitions. [2023-12-16 00:06:21,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-16 00:06:21,030 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 25 [2023-12-16 00:06:21,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 00:06:21,036 INFO L225 Difference]: With dead ends: 38 [2023-12-16 00:06:21,036 INFO L226 Difference]: Without dead ends: 18 [2023-12-16 00:06:21,039 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-16 00:06:21,044 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-16 00:06:21,045 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 18 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-16 00:06:21,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2023-12-16 00:06:21,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2023-12-16 00:06:21,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-16 00:06:21,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2023-12-16 00:06:21,083 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 25 [2023-12-16 00:06:21,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 00:06:21,084 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2023-12-16 00:06:21,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-16 00:06:21,085 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2023-12-16 00:06:21,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-12-16 00:06:21,087 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 00:06:21,087 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 00:06:21,096 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-16 00:06:21,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-12-16 00:06:21,294 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 00:06:21,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 00:06:21,295 INFO L85 PathProgramCache]: Analyzing trace with hash -265195610, now seen corresponding path program 1 times [2023-12-16 00:06:21,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 00:06:21,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194184465] [2023-12-16 00:06:21,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 00:06:21,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 00:06:21,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 00:06:21,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-16 00:06:21,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 00:06:21,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-16 00:06:21,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 00:06:21,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-12-16 00:06:21,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 00:06:21,432 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-16 00:06:21,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 00:06:21,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194184465] [2023-12-16 00:06:21,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194184465] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-16 00:06:21,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721779084] [2023-12-16 00:06:21,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 00:06:21,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 00:06:21,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 00:06:21,436 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) [2023-12-16 00:06:21,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-16 00:06:21,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 00:06:21,515 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-16 00:06:21,517 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 00:06:21,530 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-16 00:06:21,530 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-16 00:06:21,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721779084] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-16 00:06:21,530 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-16 00:06:21,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-12-16 00:06:21,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317053416] [2023-12-16 00:06:21,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-16 00:06:21,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-16 00:06:21,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 00:06:21,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-16 00:06:21,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-16 00:06:21,533 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-16 00:06:21,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 00:06:21,556 INFO L93 Difference]: Finished difference Result 35 states and 43 transitions. [2023-12-16 00:06:21,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-16 00:06:21,557 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 25 [2023-12-16 00:06:21,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 00:06:21,558 INFO L225 Difference]: With dead ends: 35 [2023-12-16 00:06:21,558 INFO L226 Difference]: Without dead ends: 19 [2023-12-16 00:06:21,559 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-16 00:06:21,560 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-16 00:06:21,562 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-16 00:06:21,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-12-16 00:06:21,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2023-12-16 00:06:21,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-16 00:06:21,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2023-12-16 00:06:21,576 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 25 [2023-12-16 00:06:21,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 00:06:21,581 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2023-12-16 00:06:21,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-16 00:06:21,582 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2023-12-16 00:06:21,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-12-16 00:06:21,582 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 00:06:21,582 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 00:06:21,591 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-16 00:06:21,788 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,SelfDestructingSolverStorable1 [2023-12-16 00:06:21,789 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 00:06:21,789 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 00:06:21,789 INFO L85 PathProgramCache]: Analyzing trace with hash 774126172, now seen corresponding path program 1 times [2023-12-16 00:06:21,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 00:06:21,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582530830] [2023-12-16 00:06:21,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 00:06:21,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 00:06:21,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 00:06:21,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-12-16 00:06:21,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 00:06:21,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-12-16 00:06:21,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 00:06:21,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-12-16 00:06:21,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 00:06:21,958 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-16 00:06:21,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 00:06:21,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582530830] [2023-12-16 00:06:21,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582530830] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-16 00:06:21,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826327947] [2023-12-16 00:06:21,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 00:06:21,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 00:06:21,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 00:06:21,971 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) [2023-12-16 00:06:21,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-16 00:06:22,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 00:06:22,042 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-16 00:06:22,044 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 00:06:22,062 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-16 00:06:22,062 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-16 00:06:22,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826327947] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-16 00:06:22,062 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-16 00:06:22,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 5 [2023-12-16 00:06:22,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806451335] [2023-12-16 00:06:22,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-16 00:06:22,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-16 00:06:22,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 00:06:22,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-16 00:06:22,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-16 00:06:22,064 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-16 00:06:22,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 00:06:22,086 INFO L93 Difference]: Finished difference Result 34 states and 44 transitions. [2023-12-16 00:06:22,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-16 00:06:22,087 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2023-12-16 00:06:22,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 00:06:22,087 INFO L225 Difference]: With dead ends: 34 [2023-12-16 00:06:22,087 INFO L226 Difference]: Without dead ends: 20 [2023-12-16 00:06:22,088 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-16 00:06:22,089 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-16 00:06:22,089 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-16 00:06:22,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-12-16 00:06:22,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2023-12-16 00:06:22,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-16 00:06:22,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2023-12-16 00:06:22,096 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 26 [2023-12-16 00:06:22,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 00:06:22,096 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2023-12-16 00:06:22,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-16 00:06:22,096 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2023-12-16 00:06:22,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-12-16 00:06:22,097 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 00:06:22,097 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 00:06:22,104 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-16 00:06:22,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 00:06:22,297 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 00:06:22,298 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 00:06:22,298 INFO L85 PathProgramCache]: Analyzing trace with hash 406480427, now seen corresponding path program 1 times [2023-12-16 00:06:22,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 00:06:22,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006399842] [2023-12-16 00:06:22,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 00:06:22,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 00:06:22,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 00:06:22,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-12-16 00:06:22,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 00:06:22,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-12-16 00:06:22,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 00:06:22,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-12-16 00:06:22,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 00:06:22,431 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-12-16 00:06:22,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 00:06:22,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006399842] [2023-12-16 00:06:22,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006399842] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-16 00:06:22,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472974829] [2023-12-16 00:06:22,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 00:06:22,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 00:06:22,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 00:06:22,438 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) [2023-12-16 00:06:22,460 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-16 00:06:22,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 00:06:22,518 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-16 00:06:22,521 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 00:06:22,537 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-16 00:06:22,537 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-16 00:06:22,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472974829] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-16 00:06:22,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-16 00:06:22,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-12-16 00:06:22,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244861000] [2023-12-16 00:06:22,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-16 00:06:22,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-16 00:06:22,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 00:06:22,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-16 00:06:22,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-16 00:06:22,539 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-16 00:06:22,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 00:06:22,561 INFO L93 Difference]: Finished difference Result 32 states and 37 transitions. [2023-12-16 00:06:22,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-16 00:06:22,562 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2023-12-16 00:06:22,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 00:06:22,563 INFO L225 Difference]: With dead ends: 32 [2023-12-16 00:06:22,563 INFO L226 Difference]: Without dead ends: 21 [2023-12-16 00:06:22,565 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-16 00:06:22,567 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-16 00:06:22,568 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 31 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-16 00:06:22,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-12-16 00:06:22,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-12-16 00:06:22,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-16 00:06:22,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2023-12-16 00:06:22,577 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 29 [2023-12-16 00:06:22,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 00:06:22,578 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2023-12-16 00:06:22,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-16 00:06:22,578 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2023-12-16 00:06:22,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-12-16 00:06:22,579 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 00:06:22,579 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 00:06:22,591 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-16 00:06:22,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 00:06:22,789 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 00:06:22,789 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 00:06:22,789 INFO L85 PathProgramCache]: Analyzing trace with hash 1488649810, now seen corresponding path program 1 times [2023-12-16 00:06:22,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 00:06:22,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357669677] [2023-12-16 00:06:22,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 00:06:22,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 00:06:22,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 00:06:22,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-12-16 00:06:22,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 00:06:22,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-12-16 00:06:22,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 00:06:22,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-12-16 00:06:22,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 00:06:22,884 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-12-16 00:06:22,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 00:06:22,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357669677] [2023-12-16 00:06:22,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357669677] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-16 00:06:22,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103777237] [2023-12-16 00:06:22,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 00:06:22,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 00:06:22,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 00:06:22,886 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) [2023-12-16 00:06:22,908 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-16 00:06:22,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 00:06:22,965 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-16 00:06:22,967 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 00:06:23,002 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-12-16 00:06:23,002 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 00:06:23,030 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-12-16 00:06:23,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103777237] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-16 00:06:23,030 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-16 00:06:23,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 4] total 7 [2023-12-16 00:06:23,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856500737] [2023-12-16 00:06:23,031 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-16 00:06:23,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-16 00:06:23,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 00:06:23,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-16 00:06:23,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-12-16 00:06:23,032 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-12-16 00:06:23,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 00:06:23,065 INFO L93 Difference]: Finished difference Result 42 states and 52 transitions. [2023-12-16 00:06:23,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-16 00:06:23,065 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 30 [2023-12-16 00:06:23,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 00:06:23,066 INFO L225 Difference]: With dead ends: 42 [2023-12-16 00:06:23,066 INFO L226 Difference]: Without dead ends: 24 [2023-12-16 00:06:23,066 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-12-16 00:06:23,068 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-16 00:06:23,068 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 47 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-16 00:06:23,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-12-16 00:06:23,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-12-16 00:06:23,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-16 00:06:23,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2023-12-16 00:06:23,078 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 30 [2023-12-16 00:06:23,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 00:06:23,078 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2023-12-16 00:06:23,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-12-16 00:06:23,079 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2023-12-16 00:06:23,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-12-16 00:06:23,081 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 00:06:23,081 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 00:06:23,095 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-12-16 00:06:23,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 00:06:23,295 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 00:06:23,296 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 00:06:23,296 INFO L85 PathProgramCache]: Analyzing trace with hash -944391140, now seen corresponding path program 2 times [2023-12-16 00:06:23,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 00:06:23,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958326913] [2023-12-16 00:06:23,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 00:06:23,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 00:06:23,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 00:06:23,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-16 00:06:23,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 00:06:23,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-12-16 00:06:23,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 00:06:23,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-12-16 00:06:23,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 00:06:23,400 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-12-16 00:06:23,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 00:06:23,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958326913] [2023-12-16 00:06:23,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958326913] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-16 00:06:23,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903038725] [2023-12-16 00:06:23,401 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-16 00:06:23,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 00:06:23,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 00:06:23,402 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) [2023-12-16 00:06:23,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-16 00:06:23,478 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-16 00:06:23,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-16 00:06:23,480 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-16 00:06:23,481 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 00:06:23,520 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-12-16 00:06:23,520 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 00:06:23,564 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-12-16 00:06:23,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903038725] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-16 00:06:23,564 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-16 00:06:23,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 7] total 9 [2023-12-16 00:06:23,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797665840] [2023-12-16 00:06:23,565 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-16 00:06:23,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-16 00:06:23,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 00:06:23,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-16 00:06:23,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-12-16 00:06:23,566 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-16 00:06:23,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 00:06:23,617 INFO L93 Difference]: Finished difference Result 44 states and 56 transitions. [2023-12-16 00:06:23,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-16 00:06:23,617 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) Word has length 33 [2023-12-16 00:06:23,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 00:06:23,619 INFO L225 Difference]: With dead ends: 44 [2023-12-16 00:06:23,619 INFO L226 Difference]: Without dead ends: 26 [2023-12-16 00:06:23,620 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 64 SyntacticMatches, 5 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-12-16 00:06:23,621 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-16 00:06:23,621 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 122 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-16 00:06:23,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-12-16 00:06:23,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2023-12-16 00:06:23,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-16 00:06:23,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2023-12-16 00:06:23,632 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 33 [2023-12-16 00:06:23,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 00:06:23,633 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2023-12-16 00:06:23,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-16 00:06:23,633 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2023-12-16 00:06:23,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-12-16 00:06:23,634 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 00:06:23,634 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 00:06:23,640 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-12-16 00:06:23,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 00:06:23,839 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 00:06:23,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 00:06:23,840 INFO L85 PathProgramCache]: Analyzing trace with hash 324662137, now seen corresponding path program 3 times [2023-12-16 00:06:23,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 00:06:23,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642596730] [2023-12-16 00:06:23,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 00:06:23,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 00:06:23,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 00:06:23,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-12-16 00:06:23,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 00:06:23,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-12-16 00:06:23,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 00:06:23,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-12-16 00:06:23,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 00:06:23,926 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-12-16 00:06:23,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 00:06:23,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642596730] [2023-12-16 00:06:23,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642596730] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-16 00:06:23,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084863588] [2023-12-16 00:06:23,926 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-16 00:06:23,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 00:06:23,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 00:06:23,928 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) [2023-12-16 00:06:23,949 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-16 00:06:23,997 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-12-16 00:06:23,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-16 00:06:23,998 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-16 00:06:24,000 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 00:06:24,022 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 22 proven. 3 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-12-16 00:06:24,022 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 00:06:24,056 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 22 proven. 3 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-12-16 00:06:24,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084863588] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-16 00:06:24,057 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-16 00:06:24,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 9 [2023-12-16 00:06:24,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777592084] [2023-12-16 00:06:24,057 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-16 00:06:24,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-16 00:06:24,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 00:06:24,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-16 00:06:24,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-12-16 00:06:24,059 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 9 states have internal predecessors, (29), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-16 00:06:24,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 00:06:24,088 INFO L93 Difference]: Finished difference Result 47 states and 60 transitions. [2023-12-16 00:06:24,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-16 00:06:24,089 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 9 states have internal predecessors, (29), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 37 [2023-12-16 00:06:24,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 00:06:24,089 INFO L225 Difference]: With dead ends: 47 [2023-12-16 00:06:24,089 INFO L226 Difference]: Without dead ends: 30 [2023-12-16 00:06:24,090 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-12-16 00:06:24,091 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-16 00:06:24,091 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 75 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-16 00:06:24,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-12-16 00:06:24,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2023-12-16 00:06:24,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.12) internal successors, (28), 25 states have internal predecessors, (28), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-16 00:06:24,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2023-12-16 00:06:24,100 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 37 [2023-12-16 00:06:24,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 00:06:24,101 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2023-12-16 00:06:24,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 9 states have internal predecessors, (29), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-16 00:06:24,103 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2023-12-16 00:06:24,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-12-16 00:06:24,105 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 00:06:24,105 INFO L195 NwaCegarLoop]: trace histogram [15, 5, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 00:06:24,112 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-12-16 00:06:24,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 00:06:24,310 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 00:06:24,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 00:06:24,310 INFO L85 PathProgramCache]: Analyzing trace with hash 1144467787, now seen corresponding path program 4 times [2023-12-16 00:06:24,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 00:06:24,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269139978] [2023-12-16 00:06:24,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 00:06:24,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 00:06:24,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 00:06:24,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-12-16 00:06:24,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 00:06:24,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-12-16 00:06:24,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 00:06:24,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-12-16 00:06:24,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 00:06:24,435 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2023-12-16 00:06:24,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 00:06:24,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269139978] [2023-12-16 00:06:24,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269139978] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-16 00:06:24,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14519786] [2023-12-16 00:06:24,435 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-16 00:06:24,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 00:06:24,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 00:06:24,437 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) [2023-12-16 00:06:24,458 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-16 00:06:24,534 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-16 00:06:24,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-16 00:06:24,536 INFO L262 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-16 00:06:24,537 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 00:06:24,548 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 78 proven. 3 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2023-12-16 00:06:24,548 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 00:06:24,569 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2023-12-16 00:06:24,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14519786] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-16 00:06:24,569 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-16 00:06:24,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2023-12-16 00:06:24,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663397773] [2023-12-16 00:06:24,569 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-16 00:06:24,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-16 00:06:24,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 00:06:24,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-16 00:06:24,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-12-16 00:06:24,571 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-16 00:06:24,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 00:06:24,590 INFO L93 Difference]: Finished difference Result 47 states and 53 transitions. [2023-12-16 00:06:24,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-16 00:06:24,591 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 47 [2023-12-16 00:06:24,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 00:06:24,591 INFO L225 Difference]: With dead ends: 47 [2023-12-16 00:06:24,591 INFO L226 Difference]: Without dead ends: 32 [2023-12-16 00:06:24,592 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 96 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-12-16 00:06:24,592 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-16 00:06:24,592 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 31 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-16 00:06:24,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-12-16 00:06:24,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2023-12-16 00:06:24,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 27 states have internal predecessors, (30), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-16 00:06:24,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2023-12-16 00:06:24,599 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 47 [2023-12-16 00:06:24,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 00:06:24,599 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2023-12-16 00:06:24,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-16 00:06:24,600 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2023-12-16 00:06:24,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-12-16 00:06:24,602 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 00:06:24,602 INFO L195 NwaCegarLoop]: trace histogram [15, 5, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 00:06:24,613 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-12-16 00:06:24,809 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,SelfDestructingSolverStorable7 [2023-12-16 00:06:24,810 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 00:06:24,810 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 00:06:24,810 INFO L85 PathProgramCache]: Analyzing trace with hash 1205775915, now seen corresponding path program 5 times [2023-12-16 00:06:24,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 00:06:24,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601103556] [2023-12-16 00:06:24,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 00:06:24,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 00:06:25,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 00:07:12,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-12-16 00:07:12,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 00:07:14,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-12-16 00:07:14,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 00:07:18,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-12-16 00:07:18,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2023-12-16 00:07:18,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-12-16 00:07:18,263 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: Termination requested (timeout or resource limit) at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.walkLeafNode(Interpolator.java:304) at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator$ProofTreeWalker.walk(Interpolator.java:154) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.interpolate(Interpolator.java:260) at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.getInterpolants(Interpolator.java:237) at de.uni_freiburg.informatik.ultimate.smtinterpol.smtlib2.SMTInterpol.getInterpolants(SMTInterpol.java:869) at de.uni_freiburg.informatik.ultimate.smtinterpol.smtlib2.SMTInterpol.getInterpolants(SMTInterpol.java:793) at de.uni_freiburg.informatik.ultimate.logic.NoopScript.getInterpolants(NoopScript.java:352) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.getInterpolants(WrapperScript.java:337) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.getInterpolants(WrapperScript.java:337) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.getInterpolants(ManagedScript.java:201) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.NestedInterpolantsBuilder.computeCraigInterpolants(NestedInterpolantsBuilder.java:283) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.NestedInterpolantsBuilder.(NestedInterpolantsBuilder.java:164) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolantsRecursive(InterpolatingTraceCheckCraig.java:327) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolants(InterpolatingTraceCheckCraig.java:229) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.(InterpolatingTraceCheckCraig.java:97) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolantsRecursive(InterpolatingTraceCheckCraig.java:379) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolants(InterpolatingTraceCheckCraig.java:229) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.(InterpolatingTraceCheckCraig.java:97) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleCraig.construct(IpTcStrategyModuleCraig.java:79) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleCraig.construct(IpTcStrategyModuleCraig.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:57) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:210) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:121) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:416) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-12-16 00:07:18,269 INFO L158 Benchmark]: Toolchain (without parser) took 58616.82ms. Allocated memory was 274.7MB in the beginning and 1.1GB in the end (delta: 873.5MB). Free memory was 220.3MB in the beginning and 552.8MB in the end (delta: -332.5MB). Peak memory consumption was 542.0MB. Max. memory is 8.0GB. [2023-12-16 00:07:18,269 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 203.4MB. Free memory is still 148.1MB. There was no memory consumed. Max. memory is 8.0GB. [2023-12-16 00:07:18,269 INFO L158 Benchmark]: CACSL2BoogieTranslator took 205.34ms. Allocated memory is still 274.7MB. Free memory was 219.8MB in the beginning and 208.7MB in the end (delta: 11.1MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-12-16 00:07:18,270 INFO L158 Benchmark]: Boogie Procedure Inliner took 26.89ms. Allocated memory is still 274.7MB. Free memory was 208.7MB in the beginning and 207.2MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-12-16 00:07:18,270 INFO L158 Benchmark]: Boogie Preprocessor took 42.57ms. Allocated memory is still 274.7MB. Free memory was 207.2MB in the beginning and 205.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-16 00:07:18,270 INFO L158 Benchmark]: RCFGBuilder took 399.92ms. Allocated memory is still 274.7MB. Free memory was 205.1MB in the beginning and 189.9MB in the end (delta: 15.2MB). Peak memory consumption was 15.7MB. Max. memory is 8.0GB. [2023-12-16 00:07:18,271 INFO L158 Benchmark]: TraceAbstraction took 57937.19ms. Allocated memory was 274.7MB in the beginning and 1.1GB in the end (delta: 873.5MB). Free memory was 189.4MB in the beginning and 552.8MB in the end (delta: -363.4MB). Peak memory consumption was 511.6MB. Max. memory is 8.0GB. [2023-12-16 00:07:18,272 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 203.4MB. Free memory is still 148.1MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 205.34ms. Allocated memory is still 274.7MB. Free memory was 219.8MB in the beginning and 208.7MB in the end (delta: 11.1MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 26.89ms. Allocated memory is still 274.7MB. Free memory was 208.7MB in the beginning and 207.2MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 42.57ms. Allocated memory is still 274.7MB. Free memory was 207.2MB in the beginning and 205.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 399.92ms. Allocated memory is still 274.7MB. Free memory was 205.1MB in the beginning and 189.9MB in the end (delta: 15.2MB). Peak memory consumption was 15.7MB. Max. memory is 8.0GB. * TraceAbstraction took 57937.19ms. Allocated memory was 274.7MB in the beginning and 1.1GB in the end (delta: 873.5MB). Free memory was 189.4MB in the beginning and 552.8MB in the end (delta: -363.4MB). Peak memory consumption was 511.6MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: Termination requested (timeout or resource limit) de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: Termination requested (timeout or resource limit): de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.walkLeafNode(Interpolator.java:304) RESULT: Ultimate could not prove your program: Toolchain returned no result. Completed graceful shutdown