/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.use.bitabs.translation false -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/array-industry-pattern/check_removal_from_set_after_insertion.c -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-16 00:06:14,989 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-16 00:06:15,053 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-12-16 00:06:15,056 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-16 00:06:15,057 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-16 00:06:15,078 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-16 00:06:15,078 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-16 00:06:15,078 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-16 00:06:15,079 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-16 00:06:15,082 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-16 00:06:15,082 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-16 00:06:15,082 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-16 00:06:15,082 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-16 00:06:15,083 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-16 00:06:15,084 INFO L153 SettingsManager]: * Use SBE=true [2023-12-16 00:06:15,084 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-16 00:06:15,084 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-16 00:06:15,084 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-16 00:06:15,084 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-16 00:06:15,084 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-16 00:06:15,085 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-16 00:06:15,085 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-16 00:06:15,086 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-16 00:06:15,086 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-16 00:06:15,086 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-16 00:06:15,086 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-16 00:06:15,086 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-16 00:06:15,086 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-16 00:06:15,087 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-16 00:06:15,087 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-16 00:06:15,088 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-16 00:06:15,088 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-16 00:06:15,088 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-16 00:06:15,088 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-16 00:06:15,088 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-16 00:06:15,088 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-16 00:06:15,088 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-16 00:06:15,088 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-16 00:06:15,088 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-16 00:06:15,089 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-16 00:06:15,089 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-16 00:06:15,089 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-16 00:06:15,089 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-16 00:06:15,089 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> false [2023-12-16 00:06:15,291 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-16 00:06:15,314 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-16 00:06:15,316 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-16 00:06:15,316 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-16 00:06:15,317 INFO L274 PluginConnector]: CDTParser initialized [2023-12-16 00:06:15,318 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-industry-pattern/check_removal_from_set_after_insertion.c [2023-12-16 00:06:16,563 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-16 00:06:16,727 INFO L384 CDTParser]: Found 1 translation units. [2023-12-16 00:06:16,727 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-industry-pattern/check_removal_from_set_after_insertion.c [2023-12-16 00:06:16,733 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/62ed9dde9/b99451df07aa4e9f9f212e535e6f7379/FLAG6d74ee58e [2023-12-16 00:06:16,744 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/62ed9dde9/b99451df07aa4e9f9f212e535e6f7379 [2023-12-16 00:06:16,746 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-16 00:06:16,747 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-16 00:06:16,748 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-16 00:06:16,748 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-16 00:06:16,752 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-16 00:06:16,753 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 12:06:16" (1/1) ... [2023-12-16 00:06:16,754 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f9f37c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:06:16, skipping insertion in model container [2023-12-16 00:06:16,754 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 12:06:16" (1/1) ... [2023-12-16 00:06:16,771 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-16 00:06:16,909 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-industry-pattern/check_removal_from_set_after_insertion.c[342,355] [2023-12-16 00:06:16,931 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-16 00:06:16,939 INFO L202 MainTranslator]: Completed pre-run [2023-12-16 00:06:16,948 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-industry-pattern/check_removal_from_set_after_insertion.c[342,355] [2023-12-16 00:06:16,959 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-16 00:06:16,970 INFO L206 MainTranslator]: Completed translation [2023-12-16 00:06:16,970 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:06:16 WrapperNode [2023-12-16 00:06:16,970 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-16 00:06:16,972 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-16 00:06:16,972 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-16 00:06:16,972 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-16 00:06:16,978 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:06:16" (1/1) ... [2023-12-16 00:06:16,993 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:06:16" (1/1) ... [2023-12-16 00:06:17,014 INFO L138 Inliner]: procedures = 16, calls = 24, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 133 [2023-12-16 00:06:17,015 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-16 00:06:17,015 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-16 00:06:17,015 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-16 00:06:17,015 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-16 00:06:17,023 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:06:16" (1/1) ... [2023-12-16 00:06:17,023 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:06:16" (1/1) ... [2023-12-16 00:06:17,025 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:06:16" (1/1) ... [2023-12-16 00:06:17,055 INFO L175 MemorySlicer]: Split 12 memory accesses to 3 slices as follows [2, 7, 3]. 58 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 4 writes are split as follows [0, 3, 1]. [2023-12-16 00:06:17,055 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:06:16" (1/1) ... [2023-12-16 00:06:17,056 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:06:16" (1/1) ... [2023-12-16 00:06:17,077 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:06:16" (1/1) ... [2023-12-16 00:06:17,080 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:06:16" (1/1) ... [2023-12-16 00:06:17,081 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:06:16" (1/1) ... [2023-12-16 00:06:17,082 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:06:16" (1/1) ... [2023-12-16 00:06:17,084 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-16 00:06:17,085 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-16 00:06:17,085 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-16 00:06:17,085 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-16 00:06:17,085 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:06:16" (1/1) ... [2023-12-16 00:06:17,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-16 00:06:17,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 00:06:17,164 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-12-16 00:06:17,184 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-12-16 00:06:17,197 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-16 00:06:17,198 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-16 00:06:17,198 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-12-16 00:06:17,199 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-12-16 00:06:17,199 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-16 00:06:17,199 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-12-16 00:06:17,200 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-12-16 00:06:17,200 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-12-16 00:06:17,201 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-16 00:06:17,201 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-16 00:06:17,201 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-12-16 00:06:17,201 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-12-16 00:06:17,201 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-12-16 00:06:17,201 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-16 00:06:17,302 INFO L241 CfgBuilder]: Building ICFG [2023-12-16 00:06:17,303 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-16 00:06:17,478 INFO L282 CfgBuilder]: Performing block encoding [2023-12-16 00:06:17,506 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-16 00:06:17,507 INFO L309 CfgBuilder]: Removed 6 assume(true) statements. [2023-12-16 00:06:17,507 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 12:06:17 BoogieIcfgContainer [2023-12-16 00:06:17,507 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-16 00:06:17,509 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-16 00:06:17,509 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-16 00:06:17,513 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-16 00:06:17,513 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.12 12:06:16" (1/3) ... [2023-12-16 00:06:17,514 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63b62f6e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 12:06:17, skipping insertion in model container [2023-12-16 00:06:17,514 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:06:16" (2/3) ... [2023-12-16 00:06:17,514 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63b62f6e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 12:06:17, skipping insertion in model container [2023-12-16 00:06:17,514 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 12:06:17" (3/3) ... [2023-12-16 00:06:17,515 INFO L112 eAbstractionObserver]: Analyzing ICFG check_removal_from_set_after_insertion.c [2023-12-16 00:06:17,532 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-16 00:06:17,532 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-16 00:06:17,578 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-16 00:06:17,583 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;@2a956dff, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-16 00:06:17,583 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-16 00:06:17,586 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 00:06:17,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-12-16 00:06:17,591 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 00:06:17,591 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 00:06:17,592 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 00:06:17,596 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 00:06:17,596 INFO L85 PathProgramCache]: Analyzing trace with hash 272925399, now seen corresponding path program 1 times [2023-12-16 00:06:17,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 00:06:17,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086031049] [2023-12-16 00:06:17,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 00:06:17,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 00:06:17,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 00:06:17,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-16 00:06:17,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 00:06:17,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086031049] [2023-12-16 00:06:17,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086031049] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-16 00:06:17,899 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-16 00:06:17,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-16 00:06:17,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649439020] [2023-12-16 00:06:17,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-16 00:06:17,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-16 00:06:17,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 00:06:17,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-16 00:06:17,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-16 00:06:17,934 INFO L87 Difference]: Start difference. First operand has 24 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 00:06:18,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 00:06:18,000 INFO L93 Difference]: Finished difference Result 47 states and 81 transitions. [2023-12-16 00:06:18,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-16 00:06:18,003 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-12-16 00:06:18,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 00:06:18,008 INFO L225 Difference]: With dead ends: 47 [2023-12-16 00:06:18,008 INFO L226 Difference]: Without dead ends: 23 [2023-12-16 00:06:18,010 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-16 00:06:18,014 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 0 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-16 00:06:18,015 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 41 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-16 00:06:18,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-12-16 00:06:18,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2023-12-16 00:06:18,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 00:06:18,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 32 transitions. [2023-12-16 00:06:18,043 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 32 transitions. Word has length 11 [2023-12-16 00:06:18,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 00:06:18,043 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 32 transitions. [2023-12-16 00:06:18,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 00:06:18,044 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 32 transitions. [2023-12-16 00:06:18,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-12-16 00:06:18,044 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 00:06:18,045 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 00:06:18,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-16 00:06:18,045 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 00:06:18,046 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 00:06:18,046 INFO L85 PathProgramCache]: Analyzing trace with hash 410553975, now seen corresponding path program 1 times [2023-12-16 00:06:18,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 00:06:18,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131724579] [2023-12-16 00:06:18,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 00:06:18,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 00:06:18,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 00:06:18,118 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-16 00:06:18,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 00:06:18,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131724579] [2023-12-16 00:06:18,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131724579] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-16 00:06:18,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-16 00:06:18,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-16 00:06:18,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913637608] [2023-12-16 00:06:18,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-16 00:06:18,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-16 00:06:18,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 00:06:18,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-16 00:06:18,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-16 00:06:18,121 INFO L87 Difference]: Start difference. First operand 23 states and 32 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 00:06:18,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 00:06:18,160 INFO L93 Difference]: Finished difference Result 42 states and 59 transitions. [2023-12-16 00:06:18,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-16 00:06:18,160 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-12-16 00:06:18,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 00:06:18,161 INFO L225 Difference]: With dead ends: 42 [2023-12-16 00:06:18,161 INFO L226 Difference]: Without dead ends: 30 [2023-12-16 00:06:18,161 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-16 00:06:18,162 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 37 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-16 00:06:18,163 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 33 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-16 00:06:18,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-12-16 00:06:18,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 24. [2023-12-16 00:06:18,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 00:06:18,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 33 transitions. [2023-12-16 00:06:18,172 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 33 transitions. Word has length 12 [2023-12-16 00:06:18,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 00:06:18,172 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 33 transitions. [2023-12-16 00:06:18,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 00:06:18,172 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 33 transitions. [2023-12-16 00:06:18,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-12-16 00:06:18,173 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 00:06:18,173 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 00:06:18,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-16 00:06:18,173 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 00:06:18,175 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 00:06:18,175 INFO L85 PathProgramCache]: Analyzing trace with hash -29285378, now seen corresponding path program 1 times [2023-12-16 00:06:18,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 00:06:18,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231495942] [2023-12-16 00:06:18,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 00:06:18,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 00:06:18,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 00:06:18,272 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-16 00:06:18,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 00:06:18,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231495942] [2023-12-16 00:06:18,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231495942] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-16 00:06:18,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-16 00:06:18,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-16 00:06:18,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388496307] [2023-12-16 00:06:18,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-16 00:06:18,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-16 00:06:18,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 00:06:18,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-16 00:06:18,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-16 00:06:18,274 INFO L87 Difference]: Start difference. First operand 24 states and 33 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 00:06:18,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 00:06:18,320 INFO L93 Difference]: Finished difference Result 61 states and 85 transitions. [2023-12-16 00:06:18,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-16 00:06:18,321 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-12-16 00:06:18,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 00:06:18,322 INFO L225 Difference]: With dead ends: 61 [2023-12-16 00:06:18,322 INFO L226 Difference]: Without dead ends: 42 [2023-12-16 00:06:18,324 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-16 00:06:18,324 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 25 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-16 00:06:18,325 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 98 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-16 00:06:18,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2023-12-16 00:06:18,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 30. [2023-12-16 00:06:18,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 29 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 00:06:18,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 41 transitions. [2023-12-16 00:06:18,329 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 41 transitions. Word has length 18 [2023-12-16 00:06:18,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 00:06:18,329 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 41 transitions. [2023-12-16 00:06:18,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 00:06:18,329 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 41 transitions. [2023-12-16 00:06:18,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-12-16 00:06:18,330 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 00:06:18,330 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 00:06:18,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-16 00:06:18,330 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 00:06:18,330 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 00:06:18,330 INFO L85 PathProgramCache]: Analyzing trace with hash 1590182388, now seen corresponding path program 1 times [2023-12-16 00:06:18,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 00:06:18,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520858138] [2023-12-16 00:06:18,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 00:06:18,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 00:06:18,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 00:06:18,383 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-16 00:06:18,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 00:06:18,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520858138] [2023-12-16 00:06:18,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520858138] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-16 00:06:18,383 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-16 00:06:18,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-16 00:06:18,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780975660] [2023-12-16 00:06:18,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-16 00:06:18,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-16 00:06:18,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 00:06:18,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-16 00:06:18,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-16 00:06:18,385 INFO L87 Difference]: Start difference. First operand 30 states and 41 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 00:06:18,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 00:06:18,412 INFO L93 Difference]: Finished difference Result 41 states and 55 transitions. [2023-12-16 00:06:18,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-16 00:06:18,413 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-12-16 00:06:18,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 00:06:18,413 INFO L225 Difference]: With dead ends: 41 [2023-12-16 00:06:18,413 INFO L226 Difference]: Without dead ends: 32 [2023-12-16 00:06:18,413 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-16 00:06:18,414 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 19 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-16 00:06:18,415 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 29 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-16 00:06:18,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-12-16 00:06:18,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2023-12-16 00:06:18,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.3548387096774193) internal successors, (42), 31 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 00:06:18,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2023-12-16 00:06:18,419 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 18 [2023-12-16 00:06:18,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 00:06:18,419 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2023-12-16 00:06:18,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 00:06:18,419 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2023-12-16 00:06:18,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-12-16 00:06:18,419 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 00:06:18,419 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 00:06:18,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-16 00:06:18,420 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 00:06:18,420 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 00:06:18,420 INFO L85 PathProgramCache]: Analyzing trace with hash -1025672490, now seen corresponding path program 1 times [2023-12-16 00:06:18,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 00:06:18,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689831018] [2023-12-16 00:06:18,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 00:06:18,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 00:06:18,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 00:06:18,490 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-16 00:06:18,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 00:06:18,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689831018] [2023-12-16 00:06:18,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689831018] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-16 00:06:18,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276468245] [2023-12-16 00:06:18,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 00:06:18,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 00:06:18,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 00:06:18,493 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-16 00:06:18,546 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-16 00:06:18,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 00:06:18,585 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-16 00:06:18,588 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 00:06:18,645 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-16 00:06:18,645 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 00:06:18,674 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-16 00:06:18,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276468245] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-16 00:06:18,674 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-16 00:06:18,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 8 [2023-12-16 00:06:18,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370396915] [2023-12-16 00:06:18,677 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-16 00:06:18,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-16 00:06:18,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 00:06:18,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-16 00:06:18,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2023-12-16 00:06:18,681 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 00:06:18,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 00:06:18,850 INFO L93 Difference]: Finished difference Result 126 states and 162 transitions. [2023-12-16 00:06:18,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-16 00:06:18,851 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2023-12-16 00:06:18,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 00:06:18,854 INFO L225 Difference]: With dead ends: 126 [2023-12-16 00:06:18,854 INFO L226 Difference]: Without dead ends: 97 [2023-12-16 00:06:18,855 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=125, Unknown=0, NotChecked=0, Total=210 [2023-12-16 00:06:18,855 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 146 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-16 00:06:18,856 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 77 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-16 00:06:18,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2023-12-16 00:06:18,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 43. [2023-12-16 00:06:18,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.3095238095238095) internal successors, (55), 42 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 00:06:18,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 55 transitions. [2023-12-16 00:06:18,863 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 55 transitions. Word has length 22 [2023-12-16 00:06:18,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 00:06:18,864 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 55 transitions. [2023-12-16 00:06:18,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 00:06:18,864 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 55 transitions. [2023-12-16 00:06:18,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-12-16 00:06:18,864 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 00:06:18,865 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 00:06:18,888 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-16 00:06:19,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 00:06:19,071 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 00:06:19,076 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 00:06:19,076 INFO L85 PathProgramCache]: Analyzing trace with hash 521152929, now seen corresponding path program 1 times [2023-12-16 00:06:19,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 00:06:19,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971420055] [2023-12-16 00:06:19,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 00:06:19,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 00:06:19,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 00:06:19,244 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-16 00:06:19,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 00:06:19,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971420055] [2023-12-16 00:06:19,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971420055] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-16 00:06:19,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487842788] [2023-12-16 00:06:19,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 00:06:19,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 00:06:19,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 00:06:19,249 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-16 00:06:19,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-16 00:06:19,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 00:06:19,331 INFO L262 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-16 00:06:19,332 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 00:06:19,400 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-16 00:06:19,400 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 00:06:19,459 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-16 00:06:19,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487842788] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-16 00:06:19,459 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-16 00:06:19,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2023-12-16 00:06:19,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149415236] [2023-12-16 00:06:19,460 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-16 00:06:19,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-12-16 00:06:19,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 00:06:19,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-12-16 00:06:19,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=142, Unknown=0, NotChecked=0, Total=272 [2023-12-16 00:06:19,461 INFO L87 Difference]: Start difference. First operand 43 states and 55 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 00:06:19,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 00:06:19,499 INFO L93 Difference]: Finished difference Result 89 states and 119 transitions. [2023-12-16 00:06:19,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-16 00:06:19,500 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2023-12-16 00:06:19,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 00:06:19,500 INFO L225 Difference]: With dead ends: 89 [2023-12-16 00:06:19,500 INFO L226 Difference]: Without dead ends: 52 [2023-12-16 00:06:19,500 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=130, Invalid=142, Unknown=0, NotChecked=0, Total=272 [2023-12-16 00:06:19,501 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 6 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-16 00:06:19,501 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 47 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-16 00:06:19,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-12-16 00:06:19,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 49. [2023-12-16 00:06:19,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.2708333333333333) internal successors, (61), 48 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 00:06:19,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 61 transitions. [2023-12-16 00:06:19,507 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 61 transitions. Word has length 28 [2023-12-16 00:06:19,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 00:06:19,507 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 61 transitions. [2023-12-16 00:06:19,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 00:06:19,508 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 61 transitions. [2023-12-16 00:06:19,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-12-16 00:06:19,508 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 00:06:19,508 INFO L195 NwaCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 00:06:19,526 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-16 00:06:19,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-12-16 00:06:19,713 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 00:06:19,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 00:06:19,714 INFO L85 PathProgramCache]: Analyzing trace with hash -690598495, now seen corresponding path program 2 times [2023-12-16 00:06:19,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 00:06:19,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018134646] [2023-12-16 00:06:19,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 00:06:19,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 00:06:19,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 00:06:19,928 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-16 00:06:19,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 00:06:19,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018134646] [2023-12-16 00:06:19,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018134646] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-16 00:06:19,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147043588] [2023-12-16 00:06:19,929 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-16 00:06:19,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 00:06:19,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 00:06:19,946 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-16 00:06:19,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-16 00:06:20,079 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-16 00:06:20,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-16 00:06:20,081 INFO L262 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 13 conjunts are in the unsatisfiable core [2023-12-16 00:06:20,083 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 00:06:20,205 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-16 00:06:20,205 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 00:06:20,394 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-16 00:06:20,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147043588] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-16 00:06:20,395 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-16 00:06:20,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 34 [2023-12-16 00:06:20,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124613618] [2023-12-16 00:06:20,395 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-16 00:06:20,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-12-16 00:06:20,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 00:06:20,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-12-16 00:06:20,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=550, Invalid=640, Unknown=0, NotChecked=0, Total=1190 [2023-12-16 00:06:20,397 INFO L87 Difference]: Start difference. First operand 49 states and 61 transitions. Second operand has 35 states, 35 states have (on average 1.6) internal successors, (56), 34 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 00:06:20,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 00:06:20,494 INFO L93 Difference]: Finished difference Result 101 states and 137 transitions. [2023-12-16 00:06:20,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-12-16 00:06:20,495 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6) internal successors, (56), 34 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2023-12-16 00:06:20,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 00:06:20,495 INFO L225 Difference]: With dead ends: 101 [2023-12-16 00:06:20,495 INFO L226 Difference]: Without dead ends: 64 [2023-12-16 00:06:20,496 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 449 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=550, Invalid=640, Unknown=0, NotChecked=0, Total=1190 [2023-12-16 00:06:20,496 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 9 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-16 00:06:20,496 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 84 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-16 00:06:20,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2023-12-16 00:06:20,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 61. [2023-12-16 00:06:20,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.2166666666666666) internal successors, (73), 60 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 00:06:20,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 73 transitions. [2023-12-16 00:06:20,504 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 73 transitions. Word has length 34 [2023-12-16 00:06:20,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 00:06:20,505 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 73 transitions. [2023-12-16 00:06:20,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.6) internal successors, (56), 34 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 00:06:20,505 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 73 transitions. [2023-12-16 00:06:20,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-12-16 00:06:20,506 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 00:06:20,506 INFO L195 NwaCegarLoop]: trace histogram [22, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 00:06:20,525 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-16 00:06:20,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 00:06:20,712 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 00:06:20,713 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 00:06:20,713 INFO L85 PathProgramCache]: Analyzing trace with hash 773952929, now seen corresponding path program 3 times [2023-12-16 00:06:20,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 00:06:20,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679624192] [2023-12-16 00:06:20,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 00:06:20,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 00:06:20,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 00:06:21,334 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-16 00:06:21,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 00:06:21,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679624192] [2023-12-16 00:06:21,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679624192] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-16 00:06:21,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269168830] [2023-12-16 00:06:21,335 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-16 00:06:21,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 00:06:21,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 00:06:21,353 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-16 00:06:21,354 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-16 00:06:21,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-12-16 00:06:21,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-16 00:06:21,470 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-16 00:06:21,482 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 00:06:21,581 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2023-12-16 00:06:21,581 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 00:06:21,654 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2023-12-16 00:06:21,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269168830] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-16 00:06:21,655 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-16 00:06:21,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 4, 4] total 30 [2023-12-16 00:06:21,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322811915] [2023-12-16 00:06:21,655 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-16 00:06:21,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-12-16 00:06:21,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 00:06:21,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-12-16 00:06:21,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=605, Unknown=0, NotChecked=0, Total=930 [2023-12-16 00:06:21,657 INFO L87 Difference]: Start difference. First operand 61 states and 73 transitions. Second operand has 31 states, 31 states have (on average 2.129032258064516) internal successors, (66), 30 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 00:06:22,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 00:06:22,292 INFO L93 Difference]: Finished difference Result 379 states and 461 transitions. [2023-12-16 00:06:22,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-12-16 00:06:22,292 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.129032258064516) internal successors, (66), 30 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2023-12-16 00:06:22,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 00:06:22,293 INFO L225 Difference]: With dead ends: 379 [2023-12-16 00:06:22,294 INFO L226 Difference]: Without dead ends: 342 [2023-12-16 00:06:22,295 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=935, Invalid=2035, Unknown=0, NotChecked=0, Total=2970 [2023-12-16 00:06:22,295 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 1034 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1034 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-16 00:06:22,295 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1034 Valid, 180 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-16 00:06:22,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2023-12-16 00:06:22,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 96. [2023-12-16 00:06:22,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.231578947368421) internal successors, (117), 95 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 00:06:22,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 117 transitions. [2023-12-16 00:06:22,307 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 117 transitions. Word has length 46 [2023-12-16 00:06:22,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 00:06:22,307 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 117 transitions. [2023-12-16 00:06:22,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.129032258064516) internal successors, (66), 30 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 00:06:22,307 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 117 transitions. [2023-12-16 00:06:22,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-12-16 00:06:22,308 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 00:06:22,308 INFO L195 NwaCegarLoop]: trace histogram [23, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 00:06:22,327 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-16 00:06:22,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 00:06:22,513 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 00:06:22,514 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 00:06:22,514 INFO L85 PathProgramCache]: Analyzing trace with hash -579863348, now seen corresponding path program 1 times [2023-12-16 00:06:22,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 00:06:22,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041450470] [2023-12-16 00:06:22,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 00:06:22,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 00:06:22,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 00:06:22,659 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 295 trivial. 0 not checked. [2023-12-16 00:06:22,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 00:06:22,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041450470] [2023-12-16 00:06:22,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041450470] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-16 00:06:22,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-16 00:06:22,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-16 00:06:22,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485654301] [2023-12-16 00:06:22,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-16 00:06:22,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-16 00:06:22,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 00:06:22,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-16 00:06:22,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-16 00:06:22,661 INFO L87 Difference]: Start difference. First operand 96 states and 117 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 00:06:22,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 00:06:22,688 INFO L93 Difference]: Finished difference Result 168 states and 210 transitions. [2023-12-16 00:06:22,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-16 00:06:22,688 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2023-12-16 00:06:22,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 00:06:22,689 INFO L225 Difference]: With dead ends: 168 [2023-12-16 00:06:22,689 INFO L226 Difference]: Without dead ends: 130 [2023-12-16 00:06:22,689 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-16 00:06:22,691 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 19 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-16 00:06:22,691 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 70 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-16 00:06:22,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2023-12-16 00:06:22,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 102. [2023-12-16 00:06:22,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 1.2178217821782178) internal successors, (123), 101 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 00:06:22,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 123 transitions. [2023-12-16 00:06:22,706 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 123 transitions. Word has length 65 [2023-12-16 00:06:22,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 00:06:22,706 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 123 transitions. [2023-12-16 00:06:22,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 00:06:22,707 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 123 transitions. [2023-12-16 00:06:22,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-12-16 00:06:22,707 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 00:06:22,708 INFO L195 NwaCegarLoop]: trace histogram [23, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 00:06:22,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-12-16 00:06:22,708 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 00:06:22,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 00:06:22,708 INFO L85 PathProgramCache]: Analyzing trace with hash -597335259, now seen corresponding path program 1 times [2023-12-16 00:06:22,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 00:06:22,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657377989] [2023-12-16 00:06:22,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 00:06:22,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 00:06:22,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 00:06:23,324 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-12-16 00:06:23,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 00:06:23,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657377989] [2023-12-16 00:06:23,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657377989] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-16 00:06:23,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323096253] [2023-12-16 00:06:23,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 00:06:23,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 00:06:23,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 00:06:23,336 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-16 00:06:23,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-16 00:06:23,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 00:06:23,513 INFO L262 TraceCheckSpWp]: Trace formula consists of 606 conjuncts, 26 conjunts are in the unsatisfiable core [2023-12-16 00:06:23,515 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 00:06:23,887 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-12-16 00:06:23,887 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 00:06:24,556 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-12-16 00:06:24,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323096253] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-16 00:06:24,556 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-16 00:06:24,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 73 [2023-12-16 00:06:24,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096419209] [2023-12-16 00:06:24,557 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-16 00:06:24,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2023-12-16 00:06:24,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 00:06:24,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2023-12-16 00:06:24,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2448, Invalid=2954, Unknown=0, NotChecked=0, Total=5402 [2023-12-16 00:06:24,560 INFO L87 Difference]: Start difference. First operand 102 states and 123 transitions. Second operand has 74 states, 74 states have (on average 1.3243243243243243) internal successors, (98), 73 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 00:06:24,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 00:06:24,676 INFO L93 Difference]: Finished difference Result 207 states and 274 transitions. [2023-12-16 00:06:24,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-12-16 00:06:24,676 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 1.3243243243243243) internal successors, (98), 73 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2023-12-16 00:06:24,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 00:06:24,676 INFO L225 Difference]: With dead ends: 207 [2023-12-16 00:06:24,676 INFO L226 Difference]: Without dead ends: 130 [2023-12-16 00:06:24,678 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2230 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2448, Invalid=2954, Unknown=0, NotChecked=0, Total=5402 [2023-12-16 00:06:24,678 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 6 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-16 00:06:24,679 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 74 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-16 00:06:24,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2023-12-16 00:06:24,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 127. [2023-12-16 00:06:24,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 1.1746031746031746) internal successors, (148), 126 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 00:06:24,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 148 transitions. [2023-12-16 00:06:24,700 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 148 transitions. Word has length 65 [2023-12-16 00:06:24,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 00:06:24,700 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 148 transitions. [2023-12-16 00:06:24,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 1.3243243243243243) internal successors, (98), 73 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 00:06:24,700 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 148 transitions. [2023-12-16 00:06:24,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-12-16 00:06:24,701 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 00:06:24,701 INFO L195 NwaCegarLoop]: trace histogram [48, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 00:06:24,708 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-12-16 00:06:24,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-12-16 00:06:24,907 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 00:06:24,907 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 00:06:24,907 INFO L85 PathProgramCache]: Analyzing trace with hash -878508347, now seen corresponding path program 2 times [2023-12-16 00:06:24,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 00:06:24,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282479589] [2023-12-16 00:06:24,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 00:06:24,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 00:06:24,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 00:06:26,851 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-12-16 00:06:26,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 00:06:26,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282479589] [2023-12-16 00:06:26,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282479589] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-16 00:06:26,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274725379] [2023-12-16 00:06:26,852 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-16 00:06:26,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 00:06:26,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 00:06:26,853 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-16 00:06:26,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-16 00:06:27,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-16 00:06:27,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-16 00:06:27,102 INFO L262 TraceCheckSpWp]: Trace formula consists of 981 conjuncts, 51 conjunts are in the unsatisfiable core [2023-12-16 00:06:27,106 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 00:06:28,378 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-12-16 00:06:28,379 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 00:06:31,359 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-12-16 00:06:31,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274725379] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-16 00:06:31,359 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-16 00:06:31,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 148 [2023-12-16 00:06:31,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257354963] [2023-12-16 00:06:31,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-16 00:06:31,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 149 states [2023-12-16 00:06:31,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 00:06:31,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 149 interpolants. [2023-12-16 00:06:31,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9898, Invalid=12154, Unknown=0, NotChecked=0, Total=22052 [2023-12-16 00:06:31,367 INFO L87 Difference]: Start difference. First operand 127 states and 148 transitions. Second operand has 149 states, 149 states have (on average 1.1610738255033557) internal successors, (173), 148 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 00:06:31,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 00:06:31,555 INFO L93 Difference]: Finished difference Result 257 states and 349 transitions. [2023-12-16 00:06:31,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2023-12-16 00:06:31,556 INFO L78 Accepts]: Start accepts. Automaton has has 149 states, 149 states have (on average 1.1610738255033557) internal successors, (173), 148 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2023-12-16 00:06:31,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 00:06:31,557 INFO L225 Difference]: With dead ends: 257 [2023-12-16 00:06:31,558 INFO L226 Difference]: Without dead ends: 180 [2023-12-16 00:06:31,565 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9455 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=9898, Invalid=12154, Unknown=0, NotChecked=0, Total=22052 [2023-12-16 00:06:31,566 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 6 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-16 00:06:31,566 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 89 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-16 00:06:31,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2023-12-16 00:06:31,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 177. [2023-12-16 00:06:31,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 1.125) internal successors, (198), 176 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 00:06:31,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 198 transitions. [2023-12-16 00:06:31,584 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 198 transitions. Word has length 90 [2023-12-16 00:06:31,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 00:06:31,584 INFO L495 AbstractCegarLoop]: Abstraction has 177 states and 198 transitions. [2023-12-16 00:06:31,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 149 states, 149 states have (on average 1.1610738255033557) internal successors, (173), 148 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 00:06:31,585 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 198 transitions. [2023-12-16 00:06:31,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2023-12-16 00:06:31,589 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 00:06:31,589 INFO L195 NwaCegarLoop]: trace histogram [98, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 00:06:31,598 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-12-16 00:06:31,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 00:06:31,796 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 00:06:31,796 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 00:06:31,797 INFO L85 PathProgramCache]: Analyzing trace with hash 598225605, now seen corresponding path program 3 times [2023-12-16 00:06:31,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 00:06:31,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139029031] [2023-12-16 00:06:31,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 00:06:31,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 00:06:31,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 00:06:38,329 INFO L134 CoverageAnalysis]: Checked inductivity of 4895 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-12-16 00:06:38,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 00:06:38,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139029031] [2023-12-16 00:06:38,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139029031] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-16 00:06:38,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337839190] [2023-12-16 00:06:38,329 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-16 00:06:38,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 00:06:38,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 00:06:38,330 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-16 00:06:38,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-16 00:06:38,620 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-16 00:06:38,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-16 00:06:38,622 INFO L262 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-16 00:06:38,633 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 00:06:38,845 INFO L134 CoverageAnalysis]: Checked inductivity of 4895 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4888 trivial. 0 not checked. [2023-12-16 00:06:38,845 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 00:06:39,324 INFO L134 CoverageAnalysis]: Checked inductivity of 4895 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4888 trivial. 0 not checked. [2023-12-16 00:06:39,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337839190] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-16 00:06:39,324 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-16 00:06:39,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 7, 7] total 112 [2023-12-16 00:06:39,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380414541] [2023-12-16 00:06:39,325 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-16 00:06:39,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 113 states [2023-12-16 00:06:39,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 00:06:39,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2023-12-16 00:06:39,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5905, Invalid=6751, Unknown=0, NotChecked=0, Total=12656 [2023-12-16 00:06:39,329 INFO L87 Difference]: Start difference. First operand 177 states and 198 transitions. Second operand has 113 states, 113 states have (on average 1.5132743362831858) internal successors, (171), 112 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 00:07:14,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 00:07:14,591 INFO L93 Difference]: Finished difference Result 3134 states and 3694 transitions. [2023-12-16 00:07:14,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 315 states. [2023-12-16 00:07:14,592 INFO L78 Accepts]: Start accepts. Automaton has has 113 states, 113 states have (on average 1.5132743362831858) internal successors, (171), 112 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2023-12-16 00:07:14,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 00:07:14,599 INFO L225 Difference]: With dead ends: 3134 [2023-12-16 00:07:14,599 INFO L226 Difference]: Without dead ends: 3057 [2023-12-16 00:07:14,610 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 685 GetRequests, 267 SyntacticMatches, 0 SemanticMatches, 418 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48459 ImplicationChecksByTransitivity, 17.5s TimeCoverageRelationStatistics Valid=55645, Invalid=120335, Unknown=0, NotChecked=0, Total=175980 [2023-12-16 00:07:14,611 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 9043 mSDsluCounter, 887 mSDsCounter, 0 mSdLazyCounter, 1461 mSolverCounterSat, 1773 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9043 SdHoareTripleChecker+Valid, 906 SdHoareTripleChecker+Invalid, 3234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1773 IncrementalHoareTripleChecker+Valid, 1461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-12-16 00:07:14,611 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9043 Valid, 906 Invalid, 3234 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1773 Valid, 1461 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-12-16 00:07:14,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3057 states. [2023-12-16 00:07:14,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3057 to 778. [2023-12-16 00:07:14,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 778 states, 777 states have (on average 1.2831402831402832) internal successors, (997), 777 states have internal predecessors, (997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 00:07:14,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 778 states to 778 states and 997 transitions. [2023-12-16 00:07:14,763 INFO L78 Accepts]: Start accepts. Automaton has 778 states and 997 transitions. Word has length 140 [2023-12-16 00:07:14,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 00:07:14,764 INFO L495 AbstractCegarLoop]: Abstraction has 778 states and 997 transitions. [2023-12-16 00:07:14,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 113 states, 113 states have (on average 1.5132743362831858) internal successors, (171), 112 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 00:07:14,764 INFO L276 IsEmpty]: Start isEmpty. Operand 778 states and 997 transitions. [2023-12-16 00:07:14,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2023-12-16 00:07:14,765 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 00:07:14,765 INFO L195 NwaCegarLoop]: trace histogram [103, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 00:07:14,776 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-12-16 00:07:14,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 00:07:14,976 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 00:07:14,977 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 00:07:14,977 INFO L85 PathProgramCache]: Analyzing trace with hash -135265976, now seen corresponding path program 4 times [2023-12-16 00:07:14,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 00:07:14,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262082269] [2023-12-16 00:07:14,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 00:07:14,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 00:07:15,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 00:07:15,200 INFO L134 CoverageAnalysis]: Checked inductivity of 5408 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 5403 trivial. 0 not checked. [2023-12-16 00:07:15,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 00:07:15,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262082269] [2023-12-16 00:07:15,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262082269] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-16 00:07:15,201 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-16 00:07:15,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-16 00:07:15,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086624291] [2023-12-16 00:07:15,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-16 00:07:15,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-16 00:07:15,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 00:07:15,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-16 00:07:15,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-16 00:07:15,202 INFO L87 Difference]: Start difference. First operand 778 states and 997 transitions. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 00:07:15,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 00:07:15,352 INFO L93 Difference]: Finished difference Result 1289 states and 1709 transitions. [2023-12-16 00:07:15,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-16 00:07:15,352 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 149 [2023-12-16 00:07:15,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 00:07:15,355 INFO L225 Difference]: With dead ends: 1289 [2023-12-16 00:07:15,355 INFO L226 Difference]: Without dead ends: 778 [2023-12-16 00:07:15,356 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-16 00:07:15,357 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 10 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-16 00:07:15,357 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 35 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-16 00:07:15,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 778 states. [2023-12-16 00:07:15,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 778 to 582. [2023-12-16 00:07:15,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 582 states, 581 states have (on average 1.2048192771084338) internal successors, (700), 581 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 00:07:15,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 582 states to 582 states and 700 transitions. [2023-12-16 00:07:15,466 INFO L78 Accepts]: Start accepts. Automaton has 582 states and 700 transitions. Word has length 149 [2023-12-16 00:07:15,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 00:07:15,467 INFO L495 AbstractCegarLoop]: Abstraction has 582 states and 700 transitions. [2023-12-16 00:07:15,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 00:07:15,467 INFO L276 IsEmpty]: Start isEmpty. Operand 582 states and 700 transitions. [2023-12-16 00:07:15,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2023-12-16 00:07:15,468 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 00:07:15,468 INFO L195 NwaCegarLoop]: trace histogram [103, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 00:07:15,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-12-16 00:07:15,468 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 00:07:15,469 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 00:07:15,469 INFO L85 PathProgramCache]: Analyzing trace with hash -1156334330, now seen corresponding path program 1 times [2023-12-16 00:07:15,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 00:07:15,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364301787] [2023-12-16 00:07:15,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 00:07:15,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 00:07:15,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2023-12-16 00:07:22,006 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-16 00:07:22,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-12-16 00:07:22,007 WARN L619 AbstractCegarLoop]: Verification canceled: while NwaCegarLoop was analyzing trace of length 150 with TraceHistMax 103,while InterpolatingTraceCheckCraig was constructing Craig interpolants,while PredicateComparison was comparing new predicate (quantifier-free) to 104 known predicates. [2023-12-16 00:07:22,012 INFO L445 BasicCegarLoop]: Path program histogram: [4, 3, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 00:07:22,014 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-12-16 00:07:22,015 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.12 12:07:22 BoogieIcfgContainer [2023-12-16 00:07:22,015 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-16 00:07:22,016 INFO L158 Benchmark]: Toolchain (without parser) took 65268.60ms. Allocated memory was 228.6MB in the beginning and 1.1GB in the end (delta: 856.7MB). Free memory was 179.4MB in the beginning and 874.1MB in the end (delta: -694.7MB). Peak memory consumption was 162.8MB. Max. memory is 8.0GB. [2023-12-16 00:07:22,016 INFO L158 Benchmark]: CDTParser took 0.56ms. Allocated memory is still 173.0MB. Free memory is still 126.2MB. There was no memory consumed. Max. memory is 8.0GB. [2023-12-16 00:07:22,016 INFO L158 Benchmark]: CACSL2BoogieTranslator took 222.80ms. Allocated memory is still 228.6MB. Free memory was 179.4MB in the beginning and 167.8MB in the end (delta: 11.6MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-12-16 00:07:22,016 INFO L158 Benchmark]: Boogie Procedure Inliner took 42.50ms. Allocated memory is still 228.6MB. Free memory was 167.8MB in the beginning and 165.8MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-16 00:07:22,016 INFO L158 Benchmark]: Boogie Preprocessor took 68.86ms. Allocated memory is still 228.6MB. Free memory was 165.8MB in the beginning and 163.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-16 00:07:22,017 INFO L158 Benchmark]: RCFGBuilder took 422.52ms. Allocated memory is still 228.6MB. Free memory was 163.7MB in the beginning and 146.9MB in the end (delta: 16.8MB). Peak memory consumption was 16.8MB. Max. memory is 8.0GB. [2023-12-16 00:07:22,017 INFO L158 Benchmark]: TraceAbstraction took 64506.99ms. Allocated memory was 228.6MB in the beginning and 1.1GB in the end (delta: 856.7MB). Free memory was 146.3MB in the beginning and 874.1MB in the end (delta: -727.9MB). Peak memory consumption was 129.2MB. Max. memory is 8.0GB. [2023-12-16 00:07:22,018 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.56ms. Allocated memory is still 173.0MB. Free memory is still 126.2MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 222.80ms. Allocated memory is still 228.6MB. Free memory was 179.4MB in the beginning and 167.8MB in the end (delta: 11.6MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 42.50ms. Allocated memory is still 228.6MB. Free memory was 167.8MB in the beginning and 165.8MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 68.86ms. Allocated memory is still 228.6MB. Free memory was 165.8MB in the beginning and 163.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 422.52ms. Allocated memory is still 228.6MB. Free memory was 163.7MB in the beginning and 146.9MB in the end (delta: 16.8MB). Peak memory consumption was 16.8MB. Max. memory is 8.0GB. * TraceAbstraction took 64506.99ms. Allocated memory was 228.6MB in the beginning and 1.1GB in the end (delta: 856.7MB). Free memory was 146.3MB in the beginning and 874.1MB in the end (delta: -727.9MB). Peak memory consumption was 129.2MB. 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: 4]: Timeout (TraceAbstraction) Unable to prove that a call to reach_error is unreachable (line 4). Cancelled while NwaCegarLoop was analyzing trace of length 150 with TraceHistMax 103,while InterpolatingTraceCheckCraig was constructing Craig interpolants,while PredicateComparison was comparing new predicate (quantifier-free) to 104 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 64.4s, OverallIterations: 14, TraceHistogramMax: 103, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 37.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 10360 SdHoareTripleChecker+Valid, 2.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 10360 mSDsluCounter, 1763 SdHoareTripleChecker+Invalid, 2.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1478 mSDsCounter, 1936 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2544 IncrementalHoareTripleChecker+Invalid, 4480 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1936 mSolverCounterUnsat, 285 mSDtfsCounter, 2544 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1415 GetRequests, 653 SyntacticMatches, 0 SemanticMatches, 762 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61134 ImplicationChecksByTransitivity, 24.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=778occurred in iteration=12, InterpolantAutomatonStates: 564, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 13 MinimizatonAttempts, 2833 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 17.0s InterpolantComputationTime, 1123 NumberOfCodeBlocks, 996 NumberOfCodeBlocksAsserted, 25 NumberOfCheckSat, 1521 ConstructedInterpolants, 0 QuantifiedInterpolants, 4136 SizeOfPredicates, 16 NumberOfNonLiveVariables, 2666 ConjunctsInSsa, 113 ConjunctsInUnsatCore, 27 InterpolantComputations, 6 PerfectInterpolantSequences, 16399/26073 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