/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/avg60-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-20 07:20:58,046 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-20 07:20:58,093 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-12-20 07:20:58,096 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-20 07:20:58,096 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-20 07:20:58,122 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-20 07:20:58,123 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-20 07:20:58,123 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-20 07:20:58,124 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-20 07:20:58,126 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-20 07:20:58,127 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-20 07:20:58,127 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-20 07:20:58,127 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-20 07:20:58,128 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-20 07:20:58,128 INFO L153 SettingsManager]: * Use SBE=true [2023-12-20 07:20:58,128 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-20 07:20:58,129 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-20 07:20:58,129 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-20 07:20:58,129 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-20 07:20:58,130 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-20 07:20:58,130 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-20 07:20:58,130 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-20 07:20:58,130 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-20 07:20:58,130 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-20 07:20:58,131 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-20 07:20:58,131 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-20 07:20:58,131 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-20 07:20:58,131 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-20 07:20:58,131 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-20 07:20:58,132 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-20 07:20:58,132 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-20 07:20:58,132 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-20 07:20:58,132 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-20 07:20:58,133 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-20 07:20:58,133 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-20 07:20:58,133 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-20 07:20:58,133 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-20 07:20:58,133 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-20 07:20:58,133 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-20 07:20:58,134 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-20 07:20:58,134 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-20 07:20:58,134 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-20 07:20:58,134 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-20 07:20:58,134 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> false [2023-12-20 07:20:58,325 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-20 07:20:58,343 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-20 07:20:58,344 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-20 07:20:58,345 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-20 07:20:58,345 INFO L274 PluginConnector]: CDTParser initialized [2023-12-20 07:20:58,346 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/avg60-1.i [2023-12-20 07:20:59,345 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-20 07:20:59,486 INFO L384 CDTParser]: Found 1 translation units. [2023-12-20 07:20:59,486 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/avg60-1.i [2023-12-20 07:20:59,491 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b52d3e6d5/8d286586fe3647ccb21c7b0d5e9ea62a/FLAGb0abe21d8 [2023-12-20 07:20:59,500 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b52d3e6d5/8d286586fe3647ccb21c7b0d5e9ea62a [2023-12-20 07:20:59,502 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-20 07:20:59,503 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-20 07:20:59,504 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-20 07:20:59,505 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-20 07:20:59,508 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-20 07:20:59,508 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.12 07:20:59" (1/1) ... [2023-12-20 07:20:59,509 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58a69585 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 07:20:59, skipping insertion in model container [2023-12-20 07:20:59,509 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.12 07:20:59" (1/1) ... [2023-12-20 07:20:59,525 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-20 07:20:59,657 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/avg60-1.i[1282,1295] [2023-12-20 07:20:59,661 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-20 07:20:59,666 INFO L202 MainTranslator]: Completed pre-run [2023-12-20 07:20:59,687 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/avg60-1.i[1282,1295] [2023-12-20 07:20:59,688 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-20 07:20:59,697 INFO L206 MainTranslator]: Completed translation [2023-12-20 07:20:59,697 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 07:20:59 WrapperNode [2023-12-20 07:20:59,698 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-20 07:20:59,698 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-20 07:20:59,698 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-20 07:20:59,698 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-20 07:20:59,703 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 07:20:59" (1/1) ... [2023-12-20 07:20:59,707 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 07:20:59" (1/1) ... [2023-12-20 07:20:59,718 INFO L138 Inliner]: procedures = 16, calls = 22, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 69 [2023-12-20 07:20:59,719 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-20 07:20:59,719 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-20 07:20:59,719 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-20 07:20:59,719 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-20 07:20:59,727 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 07:20:59" (1/1) ... [2023-12-20 07:20:59,727 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 07:20:59" (1/1) ... [2023-12-20 07:20:59,728 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 07:20:59" (1/1) ... [2023-12-20 07:20:59,744 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]. [2023-12-20 07:20:59,744 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 07:20:59" (1/1) ... [2023-12-20 07:20:59,745 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 07:20:59" (1/1) ... [2023-12-20 07:20:59,748 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 07:20:59" (1/1) ... [2023-12-20 07:20:59,750 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 07:20:59" (1/1) ... [2023-12-20 07:20:59,751 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 07:20:59" (1/1) ... [2023-12-20 07:20:59,752 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 07:20:59" (1/1) ... [2023-12-20 07:20:59,753 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-20 07:20:59,754 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-20 07:20:59,754 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-20 07:20:59,754 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-20 07:20:59,754 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 07:20:59" (1/1) ... [2023-12-20 07:20:59,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-20 07:20:59,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:20:59,777 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-12-20 07:20:59,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-12-20 07:20:59,800 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-20 07:20:59,801 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-20 07:20:59,801 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-12-20 07:20:59,801 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-20 07:20:59,801 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-12-20 07:20:59,802 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-12-20 07:20:59,803 INFO L130 BoogieDeclarations]: Found specification of procedure avg [2023-12-20 07:20:59,803 INFO L138 BoogieDeclarations]: Found implementation of procedure avg [2023-12-20 07:20:59,803 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-20 07:20:59,803 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-20 07:20:59,804 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-12-20 07:20:59,804 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-12-20 07:20:59,804 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-20 07:20:59,852 INFO L241 CfgBuilder]: Building ICFG [2023-12-20 07:20:59,853 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-20 07:20:59,963 INFO L282 CfgBuilder]: Performing block encoding [2023-12-20 07:20:59,993 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-20 07:20:59,994 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-12-20 07:20:59,994 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.12 07:20:59 BoogieIcfgContainer [2023-12-20 07:20:59,994 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-20 07:20:59,998 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-20 07:20:59,998 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-20 07:21:00,000 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-20 07:21:00,000 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.12 07:20:59" (1/3) ... [2023-12-20 07:21:00,001 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e0ed82e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.12 07:21:00, skipping insertion in model container [2023-12-20 07:21:00,001 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 07:20:59" (2/3) ... [2023-12-20 07:21:00,001 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e0ed82e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.12 07:21:00, skipping insertion in model container [2023-12-20 07:21:00,001 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.12 07:20:59" (3/3) ... [2023-12-20 07:21:00,002 INFO L112 eAbstractionObserver]: Analyzing ICFG avg60-1.i [2023-12-20 07:21:00,022 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-20 07:21:00,022 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-20 07:21:00,052 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-20 07:21:00,056 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;@5efb7102, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-20 07:21:00,057 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-20 07:21:00,060 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) [2023-12-20 07:21:00,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-12-20 07:21:00,065 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:21:00,066 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 07:21:00,066 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:21:00,070 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:21:00,070 INFO L85 PathProgramCache]: Analyzing trace with hash -1444276640, now seen corresponding path program 1 times [2023-12-20 07:21:00,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:21:00,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020569916] [2023-12-20 07:21:00,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:21:00,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:21:00,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:21:00,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-20 07:21:00,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:21:00,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-20 07:21:00,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:21:00,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-12-20 07:21:00,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:21:00,352 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-20 07:21:00,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:21:00,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020569916] [2023-12-20 07:21:00,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020569916] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 07:21:00,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328960873] [2023-12-20 07:21:00,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:21:00,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:21:00,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:21:00,356 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 07:21:00,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-20 07:21:00,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:21:00,422 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 1 conjunts are in the unsatisfiable core [2023-12-20 07:21:00,425 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:21:00,433 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-20 07:21:00,434 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-20 07:21:00,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328960873] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 07:21:00,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-20 07:21:00,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 4 [2023-12-20 07:21:00,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138321527] [2023-12-20 07:21:00,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 07:21:00,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-20 07:21:00,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:21:00,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-20 07:21:00,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-20 07:21:00,470 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) [2023-12-20 07:21:00,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:21:00,500 INFO L93 Difference]: Finished difference Result 38 states and 55 transitions. [2023-12-20 07:21:00,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-20 07:21:00,502 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 [2023-12-20 07:21:00,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:21:00,507 INFO L225 Difference]: With dead ends: 38 [2023-12-20 07:21:00,507 INFO L226 Difference]: Without dead ends: 18 [2023-12-20 07:21:00,509 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 [2023-12-20 07:21:00,511 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 [2023-12-20 07:21:00,511 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] [2023-12-20 07:21:00,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2023-12-20 07:21:00,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2023-12-20 07:21:00,531 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) [2023-12-20 07:21:00,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2023-12-20 07:21:00,533 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 25 [2023-12-20 07:21:00,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:21:00,534 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2023-12-20 07:21:00,534 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) [2023-12-20 07:21:00,534 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2023-12-20 07:21:00,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-12-20 07:21:00,535 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:21:00,535 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 07:21:00,543 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-20 07:21:00,740 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 [2023-12-20 07:21:00,741 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:21:00,741 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:21:00,741 INFO L85 PathProgramCache]: Analyzing trace with hash -265195610, now seen corresponding path program 1 times [2023-12-20 07:21:00,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:21:00,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413934991] [2023-12-20 07:21:00,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:21:00,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:21:00,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:21:00,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-20 07:21:00,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:21:00,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-20 07:21:00,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:21:00,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-12-20 07:21:00,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:21:00,849 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-20 07:21:00,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:21:00,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413934991] [2023-12-20 07:21:00,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413934991] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 07:21:00,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589701672] [2023-12-20 07:21:00,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:21:00,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:21:00,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:21:00,852 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 07:21:00,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-20 07:21:00,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:21:00,905 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-20 07:21:00,906 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:21:00,916 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-20 07:21:00,916 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-20 07:21:00,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589701672] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 07:21:00,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-20 07:21:00,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-12-20 07:21:00,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326295984] [2023-12-20 07:21:00,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 07:21:00,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-20 07:21:00,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:21:00,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-20 07:21:00,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-20 07:21:00,918 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) [2023-12-20 07:21:00,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:21:00,931 INFO L93 Difference]: Finished difference Result 35 states and 43 transitions. [2023-12-20 07:21:00,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-20 07:21:00,932 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 [2023-12-20 07:21:00,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:21:00,932 INFO L225 Difference]: With dead ends: 35 [2023-12-20 07:21:00,932 INFO L226 Difference]: Without dead ends: 19 [2023-12-20 07:21:00,933 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 [2023-12-20 07:21:00,934 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 [2023-12-20 07:21:00,934 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] [2023-12-20 07:21:00,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-12-20 07:21:00,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2023-12-20 07:21:00,937 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) [2023-12-20 07:21:00,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2023-12-20 07:21:00,937 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 25 [2023-12-20 07:21:00,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:21:00,937 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2023-12-20 07:21:00,938 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) [2023-12-20 07:21:00,938 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2023-12-20 07:21:00,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-12-20 07:21:00,938 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:21:00,938 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] [2023-12-20 07:21:00,943 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-20 07:21:01,144 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 [2023-12-20 07:21:01,144 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:21:01,145 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:21:01,145 INFO L85 PathProgramCache]: Analyzing trace with hash 774126172, now seen corresponding path program 1 times [2023-12-20 07:21:01,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:21:01,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135525225] [2023-12-20 07:21:01,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:21:01,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:21:01,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:21:01,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-12-20 07:21:01,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:21:01,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-12-20 07:21:01,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:21:01,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-12-20 07:21:01,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:21:01,258 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-20 07:21:01,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:21:01,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135525225] [2023-12-20 07:21:01,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135525225] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 07:21:01,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739293570] [2023-12-20 07:21:01,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:21:01,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:21:01,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:21:01,268 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 07:21:01,269 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-20 07:21:01,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:21:01,322 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-20 07:21:01,328 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:21:01,340 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-20 07:21:01,340 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-20 07:21:01,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739293570] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 07:21:01,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-20 07:21:01,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 5 [2023-12-20 07:21:01,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123212603] [2023-12-20 07:21:01,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 07:21:01,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-20 07:21:01,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:21:01,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-20 07:21:01,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-20 07:21:01,342 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) [2023-12-20 07:21:01,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:21:01,361 INFO L93 Difference]: Finished difference Result 34 states and 44 transitions. [2023-12-20 07:21:01,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-20 07:21:01,361 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 [2023-12-20 07:21:01,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:21:01,362 INFO L225 Difference]: With dead ends: 34 [2023-12-20 07:21:01,362 INFO L226 Difference]: Without dead ends: 20 [2023-12-20 07:21:01,363 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 [2023-12-20 07:21:01,365 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 [2023-12-20 07:21:01,367 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] [2023-12-20 07:21:01,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-12-20 07:21:01,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2023-12-20 07:21:01,372 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) [2023-12-20 07:21:01,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2023-12-20 07:21:01,375 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 26 [2023-12-20 07:21:01,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:21:01,375 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2023-12-20 07:21:01,377 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) [2023-12-20 07:21:01,377 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2023-12-20 07:21:01,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-12-20 07:21:01,377 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:21:01,377 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] [2023-12-20 07:21:01,384 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-20 07:21:01,578 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 [2023-12-20 07:21:01,578 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:21:01,579 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:21:01,579 INFO L85 PathProgramCache]: Analyzing trace with hash 406480427, now seen corresponding path program 1 times [2023-12-20 07:21:01,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:21:01,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975059145] [2023-12-20 07:21:01,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:21:01,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:21:01,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:21:01,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-12-20 07:21:01,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:21:01,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-12-20 07:21:01,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:21:01,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-12-20 07:21:01,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:21:01,652 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-12-20 07:21:01,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:21:01,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975059145] [2023-12-20 07:21:01,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975059145] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 07:21:01,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007913083] [2023-12-20 07:21:01,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:21:01,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:21:01,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:21:01,654 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 07:21:01,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-20 07:21:01,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:21:01,736 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-20 07:21:01,739 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:21:01,754 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-20 07:21:01,755 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-20 07:21:01,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007913083] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 07:21:01,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-20 07:21:01,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-12-20 07:21:01,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234458131] [2023-12-20 07:21:01,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 07:21:01,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-20 07:21:01,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:21:01,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-20 07:21:01,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-20 07:21:01,757 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) [2023-12-20 07:21:01,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:21:01,772 INFO L93 Difference]: Finished difference Result 32 states and 37 transitions. [2023-12-20 07:21:01,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-20 07:21:01,773 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 [2023-12-20 07:21:01,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:21:01,773 INFO L225 Difference]: With dead ends: 32 [2023-12-20 07:21:01,774 INFO L226 Difference]: Without dead ends: 21 [2023-12-20 07:21:01,775 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 [2023-12-20 07:21:01,778 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 [2023-12-20 07:21:01,779 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] [2023-12-20 07:21:01,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-12-20 07:21:01,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-12-20 07:21:01,783 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) [2023-12-20 07:21:01,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2023-12-20 07:21:01,784 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 29 [2023-12-20 07:21:01,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:21:01,787 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2023-12-20 07:21:01,787 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) [2023-12-20 07:21:01,790 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2023-12-20 07:21:01,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-12-20 07:21:01,791 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:21:01,792 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] [2023-12-20 07:21:01,801 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-20 07:21:01,996 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 [2023-12-20 07:21:01,996 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:21:01,997 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:21:01,997 INFO L85 PathProgramCache]: Analyzing trace with hash 1488649810, now seen corresponding path program 1 times [2023-12-20 07:21:01,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:21:01,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317352503] [2023-12-20 07:21:01,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:21:01,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:21:02,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:21:02,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-12-20 07:21:02,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:21:02,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-12-20 07:21:02,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:21:02,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-12-20 07:21:02,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:21:02,087 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-12-20 07:21:02,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:21:02,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317352503] [2023-12-20 07:21:02,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317352503] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 07:21:02,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240676968] [2023-12-20 07:21:02,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:21:02,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:21:02,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:21:02,089 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 07:21:02,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-20 07:21:02,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:21:02,156 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-20 07:21:02,158 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:21:02,184 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-12-20 07:21:02,184 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 07:21:02,208 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-12-20 07:21:02,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240676968] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 07:21:02,209 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 07:21:02,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 4] total 7 [2023-12-20 07:21:02,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646869406] [2023-12-20 07:21:02,209 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 07:21:02,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-20 07:21:02,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:21:02,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-20 07:21:02,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-12-20 07:21:02,211 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) [2023-12-20 07:21:02,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:21:02,237 INFO L93 Difference]: Finished difference Result 42 states and 52 transitions. [2023-12-20 07:21:02,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-20 07:21:02,238 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 [2023-12-20 07:21:02,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:21:02,238 INFO L225 Difference]: With dead ends: 42 [2023-12-20 07:21:02,238 INFO L226 Difference]: Without dead ends: 24 [2023-12-20 07:21:02,239 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 [2023-12-20 07:21:02,239 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 [2023-12-20 07:21:02,239 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] [2023-12-20 07:21:02,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-12-20 07:21:02,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-12-20 07:21:02,244 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) [2023-12-20 07:21:02,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2023-12-20 07:21:02,246 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 30 [2023-12-20 07:21:02,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:21:02,246 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2023-12-20 07:21:02,246 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) [2023-12-20 07:21:02,246 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2023-12-20 07:21:02,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-12-20 07:21:02,248 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:21:02,248 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] [2023-12-20 07:21:02,253 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-12-20 07:21:02,453 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 [2023-12-20 07:21:02,454 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:21:02,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:21:02,454 INFO L85 PathProgramCache]: Analyzing trace with hash -944391140, now seen corresponding path program 2 times [2023-12-20 07:21:02,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:21:02,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734390049] [2023-12-20 07:21:02,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:21:02,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:21:02,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:21:02,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-20 07:21:02,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:21:02,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-12-20 07:21:02,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:21:02,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-12-20 07:21:02,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:21:02,549 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-12-20 07:21:02,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:21:02,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734390049] [2023-12-20 07:21:02,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734390049] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 07:21:02,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839948377] [2023-12-20 07:21:02,550 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-20 07:21:02,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:21:02,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:21:02,551 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 07:21:02,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-20 07:21:02,619 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-20 07:21:02,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 07:21:02,620 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-20 07:21:02,625 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:21:02,661 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-12-20 07:21:02,661 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 07:21:02,714 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-12-20 07:21:02,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839948377] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 07:21:02,714 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 07:21:02,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 7] total 14 [2023-12-20 07:21:02,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302457140] [2023-12-20 07:21:02,714 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 07:21:02,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-20 07:21:02,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:21:02,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-20 07:21:02,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-12-20 07:21:02,717 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 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) [2023-12-20 07:21:02,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:21:02,756 INFO L93 Difference]: Finished difference Result 49 states and 66 transitions. [2023-12-20 07:21:02,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-20 07:21:02,757 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 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 [2023-12-20 07:21:02,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:21:02,757 INFO L225 Difference]: With dead ends: 49 [2023-12-20 07:21:02,757 INFO L226 Difference]: Without dead ends: 31 [2023-12-20 07:21:02,757 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-12-20 07:21:02,758 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 07:21:02,758 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 92 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 07:21:02,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-12-20 07:21:02,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2023-12-20 07:21:02,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 26 states have internal predecessors, (29), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-20 07:21:02,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2023-12-20 07:21:02,769 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 33 [2023-12-20 07:21:02,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:21:02,770 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2023-12-20 07:21:02,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 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) [2023-12-20 07:21:02,770 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2023-12-20 07:21:02,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-12-20 07:21:02,770 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:21:02,770 INFO L195 NwaCegarLoop]: trace histogram [10, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 07:21:02,776 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-12-20 07:21:02,976 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 [2023-12-20 07:21:02,976 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:21:02,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:21:02,977 INFO L85 PathProgramCache]: Analyzing trace with hash -1083945041, now seen corresponding path program 3 times [2023-12-20 07:21:02,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:21:02,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347672472] [2023-12-20 07:21:02,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:21:02,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:21:03,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:21:03,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-12-20 07:21:03,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:21:03,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-12-20 07:21:03,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:21:03,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-12-20 07:21:03,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:21:03,056 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2023-12-20 07:21:03,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:21:03,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347672472] [2023-12-20 07:21:03,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347672472] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 07:21:03,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422930488] [2023-12-20 07:21:03,056 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-20 07:21:03,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:21:03,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:21:03,057 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 07:21:03,066 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-20 07:21:03,120 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-12-20 07:21:03,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 07:21:03,121 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-20 07:21:03,122 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:21:03,137 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 22 proven. 3 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2023-12-20 07:21:03,137 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 07:21:03,165 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 22 proven. 3 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2023-12-20 07:21:03,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422930488] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 07:21:03,165 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 07:21:03,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 10 [2023-12-20 07:21:03,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921562992] [2023-12-20 07:21:03,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 07:21:03,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-20 07:21:03,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:21:03,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-20 07:21:03,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-12-20 07:21:03,166 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 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) [2023-12-20 07:21:03,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:21:03,186 INFO L93 Difference]: Finished difference Result 53 states and 67 transitions. [2023-12-20 07:21:03,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-20 07:21:03,186 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 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 42 [2023-12-20 07:21:03,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:21:03,187 INFO L225 Difference]: With dead ends: 53 [2023-12-20 07:21:03,187 INFO L226 Difference]: Without dead ends: 36 [2023-12-20 07:21:03,187 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-12-20 07:21:03,187 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 07:21:03,188 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 46 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 07:21:03,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-12-20 07:21:03,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2023-12-20 07:21:03,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 31 states have (on average 1.096774193548387) internal successors, (34), 31 states have internal predecessors, (34), 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) [2023-12-20 07:21:03,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2023-12-20 07:21:03,191 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 42 [2023-12-20 07:21:03,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:21:03,191 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2023-12-20 07:21:03,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 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) [2023-12-20 07:21:03,191 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2023-12-20 07:21:03,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-12-20 07:21:03,192 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:21:03,192 INFO L195 NwaCegarLoop]: trace histogram [18, 10, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 07:21:03,207 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-12-20 07:21:03,409 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 [2023-12-20 07:21:03,410 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:21:03,410 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:21:03,410 INFO L85 PathProgramCache]: Analyzing trace with hash -407743002, now seen corresponding path program 4 times [2023-12-20 07:21:03,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:21:03,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930673748] [2023-12-20 07:21:03,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:21:03,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:21:03,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:21:03,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-12-20 07:21:03,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:21:03,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-12-20 07:21:03,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:21:03,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2023-12-20 07:21:03,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:21:03,609 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2023-12-20 07:21:03,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:21:03,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930673748] [2023-12-20 07:21:03,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930673748] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 07:21:03,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522911744] [2023-12-20 07:21:03,610 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-20 07:21:03,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:21:03,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:21:03,611 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 07:21:03,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-20 07:21:03,700 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-20 07:21:03,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 07:21:03,702 INFO L262 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-20 07:21:03,704 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:21:03,724 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2023-12-20 07:21:03,724 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 07:21:03,878 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2023-12-20 07:21:03,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522911744] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 07:21:03,878 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 07:21:03,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 13] total 25 [2023-12-20 07:21:03,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102242745] [2023-12-20 07:21:03,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 07:21:03,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-12-20 07:21:03,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:21:03,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-12-20 07:21:03,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-12-20 07:21:03,880 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand has 25 states, 25 states have (on average 1.72) internal successors, (43), 25 states have internal predecessors, (43), 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) [2023-12-20 07:21:03,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:21:03,935 INFO L93 Difference]: Finished difference Result 72 states and 91 transitions. [2023-12-20 07:21:03,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-12-20 07:21:03,936 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 25 states have internal predecessors, (43), 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 55 [2023-12-20 07:21:03,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:21:03,936 INFO L225 Difference]: With dead ends: 72 [2023-12-20 07:21:03,936 INFO L226 Difference]: Without dead ends: 48 [2023-12-20 07:21:03,937 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-12-20 07:21:03,937 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 07:21:03,937 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 77 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 07:21:03,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-12-20 07:21:03,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2023-12-20 07:21:03,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 43 states have (on average 1.069767441860465) internal successors, (46), 43 states have internal predecessors, (46), 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) [2023-12-20 07:21:03,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2023-12-20 07:21:03,941 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 55 [2023-12-20 07:21:03,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:21:03,941 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2023-12-20 07:21:03,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 25 states have internal predecessors, (43), 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) [2023-12-20 07:21:03,941 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2023-12-20 07:21:03,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-12-20 07:21:03,942 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:21:03,942 INFO L195 NwaCegarLoop]: trace histogram [22, 18, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 07:21:03,949 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-12-20 07:21:04,150 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 [2023-12-20 07:21:04,150 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:21:04,150 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:21:04,151 INFO L85 PathProgramCache]: Analyzing trace with hash 446443110, now seen corresponding path program 5 times [2023-12-20 07:21:04,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:21:04,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578756695] [2023-12-20 07:21:04,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:21:04,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:21:04,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:21:04,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-12-20 07:21:04,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:21:04,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-12-20 07:21:04,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:21:04,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-12-20 07:21:04,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:21:04,644 INFO L134 CoverageAnalysis]: Checked inductivity of 475 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2023-12-20 07:21:04,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:21:04,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578756695] [2023-12-20 07:21:04,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578756695] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 07:21:04,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223273909] [2023-12-20 07:21:04,644 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-20 07:21:04,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:21:04,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:21:04,645 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 07:21:04,650 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-20 07:21:05,400 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2023-12-20 07:21:05,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 07:21:05,404 INFO L262 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-20 07:21:05,406 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:21:05,439 INFO L134 CoverageAnalysis]: Checked inductivity of 475 backedges. 104 proven. 3 refuted. 0 times theorem prover too weak. 368 trivial. 0 not checked. [2023-12-20 07:21:05,439 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 07:21:05,496 INFO L134 CoverageAnalysis]: Checked inductivity of 475 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 472 trivial. 0 not checked. [2023-12-20 07:21:05,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223273909] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 07:21:05,497 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 07:21:05,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 5, 5] total 31 [2023-12-20 07:21:05,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129555164] [2023-12-20 07:21:05,497 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 07:21:05,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-12-20 07:21:05,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:21:05,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-12-20 07:21:05,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=603, Unknown=0, NotChecked=0, Total=930 [2023-12-20 07:21:05,499 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand has 31 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 31 states have internal predecessors, (54), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-20 07:21:05,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:21:05,544 INFO L93 Difference]: Finished difference Result 77 states and 89 transitions. [2023-12-20 07:21:05,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-12-20 07:21:05,544 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 31 states have internal predecessors, (54), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 67 [2023-12-20 07:21:05,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:21:05,545 INFO L225 Difference]: With dead ends: 77 [2023-12-20 07:21:05,545 INFO L226 Difference]: Without dead ends: 53 [2023-12-20 07:21:05,545 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=327, Invalid=603, Unknown=0, NotChecked=0, Total=930 [2023-12-20 07:21:05,546 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 07:21:05,546 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 105 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 07:21:05,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-12-20 07:21:05,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2023-12-20 07:21:05,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 48 states have (on average 1.0625) internal successors, (51), 48 states have internal predecessors, (51), 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) [2023-12-20 07:21:05,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2023-12-20 07:21:05,550 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 67 [2023-12-20 07:21:05,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:21:05,550 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2023-12-20 07:21:05,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 31 states have internal predecessors, (54), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-20 07:21:05,551 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2023-12-20 07:21:05,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-12-20 07:21:05,551 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:21:05,551 INFO L195 NwaCegarLoop]: trace histogram [23, 18, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 07:21:05,560 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-12-20 07:21:05,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:21:05,761 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:21:05,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:21:05,761 INFO L85 PathProgramCache]: Analyzing trace with hash -372261668, now seen corresponding path program 6 times [2023-12-20 07:21:05,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:21:05,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786390411] [2023-12-20 07:21:05,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:21:05,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:21:05,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:21:06,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-12-20 07:21:06,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:21:06,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-12-20 07:21:06,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:21:06,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2023-12-20 07:21:06,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:21:06,259 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2023-12-20 07:21:06,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:21:06,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786390411] [2023-12-20 07:21:06,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786390411] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 07:21:06,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200750117] [2023-12-20 07:21:06,260 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-20 07:21:06,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:21:06,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:21:06,261 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 07:21:06,268 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-20 07:21:06,518 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-12-20 07:21:06,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 07:21:06,520 INFO L262 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-20 07:21:06,521 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:21:06,629 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 102 proven. 21 refuted. 0 times theorem prover too weak. 393 trivial. 0 not checked. [2023-12-20 07:21:06,629 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 07:21:06,741 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 102 proven. 21 refuted. 0 times theorem prover too weak. 393 trivial. 0 not checked. [2023-12-20 07:21:06,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200750117] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 07:21:06,741 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 07:21:06,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 9, 9] total 40 [2023-12-20 07:21:06,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556562395] [2023-12-20 07:21:06,742 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 07:21:06,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-12-20 07:21:06,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:21:06,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-12-20 07:21:06,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=444, Invalid=1116, Unknown=0, NotChecked=0, Total=1560 [2023-12-20 07:21:06,743 INFO L87 Difference]: Start difference. First operand 53 states and 57 transitions. Second operand has 40 states, 40 states have (on average 1.6) internal successors, (64), 40 states have internal predecessors, (64), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-20 07:21:06,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:21:06,795 INFO L93 Difference]: Finished difference Result 90 states and 109 transitions. [2023-12-20 07:21:06,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-12-20 07:21:06,796 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.6) internal successors, (64), 40 states have internal predecessors, (64), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 72 [2023-12-20 07:21:06,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:21:06,796 INFO L225 Difference]: With dead ends: 90 [2023-12-20 07:21:06,796 INFO L226 Difference]: Without dead ends: 62 [2023-12-20 07:21:06,797 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=444, Invalid=1116, Unknown=0, NotChecked=0, Total=1560 [2023-12-20 07:21:06,797 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 07:21:06,798 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 122 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 07:21:06,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2023-12-20 07:21:06,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2023-12-20 07:21:06,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 57 states have (on average 1.0526315789473684) internal successors, (60), 57 states have internal predecessors, (60), 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) [2023-12-20 07:21:06,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2023-12-20 07:21:06,804 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 72 [2023-12-20 07:21:06,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:21:06,804 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2023-12-20 07:21:06,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.6) internal successors, (64), 40 states have internal predecessors, (64), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-20 07:21:06,804 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2023-12-20 07:21:06,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2023-12-20 07:21:06,807 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:21:06,807 INFO L195 NwaCegarLoop]: trace histogram [42, 24, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 07:21:06,813 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-12-20 07:21:07,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-12-20 07:21:07,013 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:21:07,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:21:07,013 INFO L85 PathProgramCache]: Analyzing trace with hash -62936090, now seen corresponding path program 7 times [2023-12-20 07:21:07,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:21:07,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539081678] [2023-12-20 07:21:07,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:21:07,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:21:07,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:21:07,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-12-20 07:21:07,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:21:07,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2023-12-20 07:21:07,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:21:07,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2023-12-20 07:21:07,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:21:07,536 INFO L134 CoverageAnalysis]: Checked inductivity of 1320 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 1020 trivial. 0 not checked. [2023-12-20 07:21:07,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:21:07,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539081678] [2023-12-20 07:21:07,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539081678] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 07:21:07,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134615475] [2023-12-20 07:21:07,536 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-20 07:21:07,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:21:07,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:21:07,537 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 07:21:07,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-20 07:21:07,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:21:07,689 INFO L262 TraceCheckSpWp]: Trace formula consists of 589 conjuncts, 26 conjunts are in the unsatisfiable core [2023-12-20 07:21:07,691 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:21:07,738 INFO L134 CoverageAnalysis]: Checked inductivity of 1320 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 1020 trivial. 0 not checked. [2023-12-20 07:21:07,738 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 07:21:08,387 INFO L134 CoverageAnalysis]: Checked inductivity of 1320 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 1020 trivial. 0 not checked. [2023-12-20 07:21:08,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134615475] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 07:21:08,387 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 07:21:08,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 27] total 53 [2023-12-20 07:21:08,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118733080] [2023-12-20 07:21:08,387 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 07:21:08,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2023-12-20 07:21:08,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:21:08,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2023-12-20 07:21:08,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2023-12-20 07:21:08,389 INFO L87 Difference]: Start difference. First operand 62 states and 66 transitions. Second operand has 53 states, 53 states have (on average 1.3396226415094339) internal successors, (71), 53 states have internal predecessors, (71), 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) [2023-12-20 07:21:08,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:21:08,438 INFO L93 Difference]: Finished difference Result 124 states and 157 transitions. [2023-12-20 07:21:08,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-12-20 07:21:08,439 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.3396226415094339) internal successors, (71), 53 states have internal predecessors, (71), 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 97 [2023-12-20 07:21:08,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:21:08,440 INFO L225 Difference]: With dead ends: 124 [2023-12-20 07:21:08,440 INFO L226 Difference]: Without dead ends: 88 [2023-12-20 07:21:08,441 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2023-12-20 07:21:08,441 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 07:21:08,442 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 62 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 07:21:08,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2023-12-20 07:21:08,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2023-12-20 07:21:08,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 83 states have (on average 1.036144578313253) internal successors, (86), 83 states have internal predecessors, (86), 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) [2023-12-20 07:21:08,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 92 transitions. [2023-12-20 07:21:08,446 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 92 transitions. Word has length 97 [2023-12-20 07:21:08,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:21:08,446 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 92 transitions. [2023-12-20 07:21:08,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.3396226415094339) internal successors, (71), 53 states have internal predecessors, (71), 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) [2023-12-20 07:21:08,446 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 92 transitions. [2023-12-20 07:21:08,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-12-20 07:21:08,447 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:21:08,447 INFO L195 NwaCegarLoop]: trace histogram [50, 42, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 07:21:08,455 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-12-20 07:21:08,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-12-20 07:21:08,653 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:21:08,653 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:21:08,653 INFO L85 PathProgramCache]: Analyzing trace with hash -1785875546, now seen corresponding path program 8 times [2023-12-20 07:21:08,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:21:08,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810738166] [2023-12-20 07:21:08,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:21:08,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:21:08,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:21:10,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-12-20 07:21:10,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:21:10,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2023-12-20 07:21:10,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:21:10,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2023-12-20 07:21:10,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:21:10,274 INFO L134 CoverageAnalysis]: Checked inductivity of 2295 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 1020 trivial. 0 not checked. [2023-12-20 07:21:10,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:21:10,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810738166] [2023-12-20 07:21:10,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810738166] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 07:21:10,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398812461] [2023-12-20 07:21:10,275 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-20 07:21:10,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:21:10,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:21:10,276 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 07:21:10,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-20 07:21:10,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-20 07:21:10,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 07:21:10,474 INFO L262 TraceCheckSpWp]: Trace formula consists of 823 conjuncts, 52 conjunts are in the unsatisfiable core [2023-12-20 07:21:10,477 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:21:10,558 INFO L134 CoverageAnalysis]: Checked inductivity of 2295 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 1020 trivial. 0 not checked. [2023-12-20 07:21:10,558 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 07:21:11,827 INFO L134 CoverageAnalysis]: Checked inductivity of 2295 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 1020 trivial. 0 not checked. [2023-12-20 07:21:11,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398812461] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 07:21:11,828 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 07:21:11,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 52, 53] total 63 [2023-12-20 07:21:11,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832215163] [2023-12-20 07:21:11,828 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 07:21:11,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2023-12-20 07:21:11,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:21:11,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2023-12-20 07:21:11,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2023-12-20 07:21:11,831 INFO L87 Difference]: Start difference. First operand 88 states and 92 transitions. Second operand has 63 states, 63 states have (on average 1.3015873015873016) internal successors, (82), 63 states have internal predecessors, (82), 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) [2023-12-20 07:21:11,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:21:11,881 INFO L93 Difference]: Finished difference Result 134 states and 151 transitions. [2023-12-20 07:21:11,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2023-12-20 07:21:11,881 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.3015873015873016) internal successors, (82), 63 states have internal predecessors, (82), 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 123 [2023-12-20 07:21:11,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:21:11,882 INFO L225 Difference]: With dead ends: 134 [2023-12-20 07:21:11,882 INFO L226 Difference]: Without dead ends: 98 [2023-12-20 07:21:11,883 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 199 SyntacticMatches, 42 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1439 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2023-12-20 07:21:11,883 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 07:21:11,883 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 47 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 07:21:11,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2023-12-20 07:21:11,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2023-12-20 07:21:11,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 93 states have (on average 1.032258064516129) internal successors, (96), 93 states have internal predecessors, (96), 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) [2023-12-20 07:21:11,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 102 transitions. [2023-12-20 07:21:11,888 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 102 transitions. Word has length 123 [2023-12-20 07:21:11,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:21:11,888 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 102 transitions. [2023-12-20 07:21:11,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.3015873015873016) internal successors, (82), 63 states have internal predecessors, (82), 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) [2023-12-20 07:21:11,888 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 102 transitions. [2023-12-20 07:21:11,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2023-12-20 07:21:11,889 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:21:11,889 INFO L195 NwaCegarLoop]: trace histogram [60, 42, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 07:21:11,897 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-12-20 07:21:12,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-12-20 07:21:12,095 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:21:12,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:21:12,095 INFO L85 PathProgramCache]: Analyzing trace with hash -467200666, now seen corresponding path program 9 times [2023-12-20 07:21:12,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:21:12,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520793096] [2023-12-20 07:21:12,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:21:12,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:21:12,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:21:12,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2023-12-20 07:21:12,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:21:12,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2023-12-20 07:21:12,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:21:12,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2023-12-20 07:21:12,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:21:12,513 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 559 refuted. 0 times theorem prover too weak. 2291 trivial. 0 not checked. [2023-12-20 07:21:12,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:21:12,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520793096] [2023-12-20 07:21:12,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520793096] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 07:21:12,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269919773] [2023-12-20 07:21:12,513 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-20 07:21:12,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:21:12,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:21:12,514 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 07:21:12,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-20 07:21:12,724 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-12-20 07:21:12,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 07:21:12,730 INFO L262 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-20 07:21:12,732 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:21:12,791 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 456 proven. 21 refuted. 0 times theorem prover too weak. 2373 trivial. 0 not checked. [2023-12-20 07:21:12,791 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 07:21:12,886 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 2829 trivial. 0 not checked. [2023-12-20 07:21:12,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269919773] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 07:21:12,887 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 07:21:12,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 9, 9] total 31 [2023-12-20 07:21:12,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970823304] [2023-12-20 07:21:12,887 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 07:21:12,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-12-20 07:21:12,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:21:12,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-12-20 07:21:12,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=675, Unknown=0, NotChecked=0, Total=930 [2023-12-20 07:21:12,890 INFO L87 Difference]: Start difference. First operand 98 states and 102 transitions. Second operand has 31 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 31 states have internal predecessors, (53), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-20 07:21:12,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:21:12,947 INFO L93 Difference]: Finished difference Result 141 states and 159 transitions. [2023-12-20 07:21:12,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-12-20 07:21:12,948 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 31 states have internal predecessors, (53), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 133 [2023-12-20 07:21:12,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:21:12,949 INFO L225 Difference]: With dead ends: 141 [2023-12-20 07:21:12,949 INFO L226 Difference]: Without dead ends: 107 [2023-12-20 07:21:12,950 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=255, Invalid=675, Unknown=0, NotChecked=0, Total=930 [2023-12-20 07:21:12,950 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 07:21:12,951 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 118 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 07:21:12,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2023-12-20 07:21:12,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2023-12-20 07:21:12,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 102 states have (on average 1.0294117647058822) internal successors, (105), 102 states have internal predecessors, (105), 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) [2023-12-20 07:21:12,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 111 transitions. [2023-12-20 07:21:12,955 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 111 transitions. Word has length 133 [2023-12-20 07:21:12,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:21:12,956 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 111 transitions. [2023-12-20 07:21:12,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 31 states have internal predecessors, (53), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-20 07:21:12,957 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 111 transitions. [2023-12-20 07:21:12,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2023-12-20 07:21:12,958 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:21:12,958 INFO L195 NwaCegarLoop]: trace histogram [60, 45, 14, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 07:21:12,965 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-12-20 07:21:13,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-12-20 07:21:13,163 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:21:13,163 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:21:13,163 INFO L85 PathProgramCache]: Analyzing trace with hash 53185761, now seen corresponding path program 10 times [2023-12-20 07:21:13,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:21:13,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963618384] [2023-12-20 07:21:13,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:21:13,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:21:13,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:21:13,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2023-12-20 07:21:13,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:21:13,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2023-12-20 07:21:13,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:21:13,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2023-12-20 07:21:13,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:21:13,609 INFO L134 CoverageAnalysis]: Checked inductivity of 3072 backedges. 0 proven. 636 refuted. 0 times theorem prover too weak. 2436 trivial. 0 not checked. [2023-12-20 07:21:13,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:21:13,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963618384] [2023-12-20 07:21:13,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963618384] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 07:21:13,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185954178] [2023-12-20 07:21:13,609 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-20 07:21:13,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:21:13,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:21:13,610 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 07:21:13,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-12-20 07:21:13,885 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-20 07:21:13,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 07:21:13,889 INFO L262 TraceCheckSpWp]: Trace formula consists of 984 conjuncts, 17 conjunts are in the unsatisfiable core [2023-12-20 07:21:13,891 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:21:13,912 INFO L134 CoverageAnalysis]: Checked inductivity of 3072 backedges. 514 proven. 120 refuted. 0 times theorem prover too weak. 2438 trivial. 0 not checked. [2023-12-20 07:21:13,912 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 07:21:14,189 INFO L134 CoverageAnalysis]: Checked inductivity of 3072 backedges. 0 proven. 636 refuted. 0 times theorem prover too weak. 2436 trivial. 0 not checked. [2023-12-20 07:21:14,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185954178] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 07:21:14,190 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 07:21:14,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 34 [2023-12-20 07:21:14,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174049992] [2023-12-20 07:21:14,190 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 07:21:14,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-12-20 07:21:14,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:21:14,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-12-20 07:21:14,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2023-12-20 07:21:14,191 INFO L87 Difference]: Start difference. First operand 107 states and 111 transitions. Second operand has 34 states, 34 states have (on average 1.588235294117647) internal successors, (54), 34 states have internal predecessors, (54), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-20 07:21:14,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:21:14,241 INFO L93 Difference]: Finished difference Result 167 states and 193 transitions. [2023-12-20 07:21:14,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-12-20 07:21:14,241 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.588235294117647) internal successors, (54), 34 states have internal predecessors, (54), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 144 [2023-12-20 07:21:14,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:21:14,242 INFO L225 Difference]: With dead ends: 167 [2023-12-20 07:21:14,242 INFO L226 Difference]: Without dead ends: 124 [2023-12-20 07:21:14,242 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 278 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2023-12-20 07:21:14,242 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 07:21:14,243 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 47 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 07:21:14,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2023-12-20 07:21:14,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2023-12-20 07:21:14,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 119 states have (on average 1.0252100840336134) internal successors, (122), 119 states have internal predecessors, (122), 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) [2023-12-20 07:21:14,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 128 transitions. [2023-12-20 07:21:14,255 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 128 transitions. Word has length 144 [2023-12-20 07:21:14,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:21:14,255 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 128 transitions. [2023-12-20 07:21:14,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.588235294117647) internal successors, (54), 34 states have internal predecessors, (54), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-20 07:21:14,255 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 128 transitions. [2023-12-20 07:21:14,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2023-12-20 07:21:14,256 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:21:14,256 INFO L195 NwaCegarLoop]: trace histogram [96, 60, 14, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 07:21:14,263 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-12-20 07:21:14,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:21:14,463 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:21:14,463 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:21:14,463 INFO L85 PathProgramCache]: Analyzing trace with hash -33357818, now seen corresponding path program 11 times [2023-12-20 07:21:14,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:21:14,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349900965] [2023-12-20 07:21:14,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:21:14,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:21:14,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:21:15,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2023-12-20 07:21:15,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:21:15,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2023-12-20 07:21:15,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:21:15,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 155 [2023-12-20 07:21:15,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:21:15,504 INFO L134 CoverageAnalysis]: Checked inductivity of 6795 backedges. 0 proven. 2710 refuted. 0 times theorem prover too weak. 4085 trivial. 0 not checked. [2023-12-20 07:21:15,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:21:15,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349900965] [2023-12-20 07:21:15,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349900965] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 07:21:15,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412195184] [2023-12-20 07:21:15,505 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-20 07:21:15,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:21:15,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:21:15,506 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 07:21:15,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process Received shutdown request... [2023-12-20 07:35:42,791 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-20 07:35:42,792 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-20 07:35:43,799 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 [2023-12-20 07:35:43,996 WARN L435 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forcibly destroying the process [2023-12-20 07:35:44,019 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 137 [2023-12-20 07:35:44,020 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-20 07:35:44,020 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-20 07:35:44,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2023-12-20 07:35:44,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994883894] [2023-12-20 07:35:44,020 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-20 07:35:44,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-12-20 07:35:44,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:35:44,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-12-20 07:35:44,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2023-12-20 07:35:44,021 INFO L87 Difference]: Start difference. First operand 124 states and 128 transitions. Second operand has 35 states, 35 states have (on average 1.457142857142857) internal successors, (51), 35 states have internal predecessors, (51), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-20 07:35:44,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-20 07:35:44,023 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2023-12-20 07:35:44,023 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 07:35:44,023 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 07:35:44,024 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-20 07:35:44,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-12-20 07:35:44,025 WARN L619 AbstractCegarLoop]: Verification canceled: while NwaCegarLoop was constructing difference of abstraction (124states) and FLOYD_HOARE automaton (currently 2 states, 35 states before enhancement),while ReachableStatesComputation was computing reachable states (1 states constructed, input type IntersectNwa). [2023-12-20 07:35:44,027 INFO L445 BasicCegarLoop]: Path program histogram: [11, 1, 1, 1, 1] [2023-12-20 07:35:44,030 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-12-20 07:35:44,032 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.12 07:35:44 BoogieIcfgContainer [2023-12-20 07:35:44,032 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-20 07:35:44,033 INFO L158 Benchmark]: Toolchain (without parser) took 884529.45ms. Allocated memory was 267.4MB in the beginning and 463.5MB in the end (delta: 196.1MB). Free memory was 215.5MB in the beginning and 186.2MB in the end (delta: 29.2MB). Peak memory consumption was 226.1MB. Max. memory is 8.0GB. [2023-12-20 07:35:44,033 INFO L158 Benchmark]: CDTParser took 0.52ms. Allocated memory is still 222.3MB. Free memory is still 171.6MB. There was no memory consumed. Max. memory is 8.0GB. [2023-12-20 07:35:44,033 INFO L158 Benchmark]: CACSL2BoogieTranslator took 193.83ms. Allocated memory is still 267.4MB. Free memory was 215.5MB in the beginning and 204.2MB in the end (delta: 11.2MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2023-12-20 07:35:44,033 INFO L158 Benchmark]: Boogie Procedure Inliner took 20.45ms. Allocated memory is still 267.4MB. Free memory was 204.2MB in the beginning and 202.6MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-20 07:35:44,034 INFO L158 Benchmark]: Boogie Preprocessor took 33.81ms. Allocated memory is still 267.4MB. Free memory was 202.6MB in the beginning and 200.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-20 07:35:44,034 INFO L158 Benchmark]: RCFGBuilder took 240.63ms. Allocated memory is still 267.4MB. Free memory was 200.5MB in the beginning and 187.1MB in the end (delta: 13.3MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. [2023-12-20 07:35:44,034 INFO L158 Benchmark]: TraceAbstraction took 884034.73ms. Allocated memory was 267.4MB in the beginning and 463.5MB in the end (delta: 196.1MB). Free memory was 186.5MB in the beginning and 186.2MB in the end (delta: 314.0kB). Peak memory consumption was 197.8MB. Max. memory is 8.0GB. [2023-12-20 07:35:44,037 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.52ms. Allocated memory is still 222.3MB. Free memory is still 171.6MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 193.83ms. Allocated memory is still 267.4MB. Free memory was 215.5MB in the beginning and 204.2MB in the end (delta: 11.2MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 20.45ms. Allocated memory is still 267.4MB. Free memory was 204.2MB in the beginning and 202.6MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 33.81ms. Allocated memory is still 267.4MB. Free memory was 202.6MB in the beginning and 200.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 240.63ms. Allocated memory is still 267.4MB. Free memory was 200.5MB in the beginning and 187.1MB in the end (delta: 13.3MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. * TraceAbstraction took 884034.73ms. Allocated memory was 267.4MB in the beginning and 463.5MB in the end (delta: 196.1MB). Free memory was 186.5MB in the beginning and 186.2MB in the end (delta: 314.0kB). Peak memory consumption was 197.8MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 50]: Timeout (TraceAbstraction) Unable to prove that a call to reach_error is unreachable (line 50). Cancelled while NwaCegarLoop was constructing difference of abstraction (124states) and FLOYD_HOARE automaton (currently 2 states, 35 states before enhancement),while ReachableStatesComputation was computing reachable states (1 states constructed, input type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 884.0s, OverallIterations: 15, TraceHistogramMax: 96, PathProgramHistogramMax: 11, EmptinessCheckTime: 0.0s, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 0 SdHoareTripleChecker+Valid, 0.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 0 mSDsluCounter, 876 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 637 mSDsCounter, 9 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 583 IncrementalHoareTripleChecker+Invalid, 592 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 9 mSolverCounterUnsat, 239 mSDtfsCounter, 583 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1998 GetRequests, 1624 SyntacticMatches, 42 SemanticMatches, 332 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2247 ImplicationChecksByTransitivity, 4.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=124occurred in iteration=14, InterpolantAutomatonStates: 315, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 14 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.6s SatisfiabilityAnalysisTime, 8.8s InterpolantComputationTime, 1997 NumberOfCodeBlocks, 1853 NumberOfCodeBlocksAsserted, 54 NumberOfCheckSat, 2754 ConstructedInterpolants, 0 QuantifiedInterpolants, 3710 SizeOfPredicates, 0 NumberOfNonLiveVariables, 4585 ConjunctsInSsa, 147 ConjunctsInUnsatCore, 39 InterpolantComputations, 4 PerfectInterpolantSequences, 29585/39820 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown