/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/recursive-simple/fibo_2calls_4-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-16 05:48:55,797 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-16 05:48:55,862 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 05:48:55,865 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-16 05:48:55,866 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-16 05:48:55,887 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-16 05:48:55,887 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-16 05:48:55,888 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-16 05:48:55,888 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-16 05:48:55,891 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-16 05:48:55,891 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-16 05:48:55,892 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-16 05:48:55,892 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-16 05:48:55,893 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-16 05:48:55,894 INFO L153 SettingsManager]: * Use SBE=true [2023-12-16 05:48:55,894 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-16 05:48:55,894 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-16 05:48:55,894 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-16 05:48:55,894 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-16 05:48:55,894 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-16 05:48:55,895 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-16 05:48:55,896 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-16 05:48:55,896 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-16 05:48:55,896 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-16 05:48:55,896 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-16 05:48:55,896 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-16 05:48:55,896 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-16 05:48:55,897 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-16 05:48:55,897 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-16 05:48:55,897 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-16 05:48:55,898 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-16 05:48:55,898 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-16 05:48:55,898 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-16 05:48:55,898 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-16 05:48:55,898 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-16 05:48:55,899 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-16 05:48:55,899 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-16 05:48:55,899 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-16 05:48:55,899 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-16 05:48:55,899 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-16 05:48:55,899 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-16 05:48:55,899 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-16 05:48:55,900 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-16 05:48:55,900 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> false [2023-12-16 05:48:56,075 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-16 05:48:56,112 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-16 05:48:56,114 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-16 05:48:56,114 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-16 05:48:56,115 INFO L274 PluginConnector]: CDTParser initialized [2023-12-16 05:48:56,115 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_4-1.c [2023-12-16 05:48:57,138 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-16 05:48:57,281 INFO L384 CDTParser]: Found 1 translation units. [2023-12-16 05:48:57,282 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_2calls_4-1.c [2023-12-16 05:48:57,287 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/128f16059/8db0fb30772246b69d4c734276b92f2f/FLAG02e498554 [2023-12-16 05:48:57,298 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/128f16059/8db0fb30772246b69d4c734276b92f2f [2023-12-16 05:48:57,300 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-16 05:48:57,301 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-16 05:48:57,302 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-16 05:48:57,302 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-16 05:48:57,306 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-16 05:48:57,306 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 05:48:57" (1/1) ... [2023-12-16 05:48:57,307 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49f96e83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:48:57, skipping insertion in model container [2023-12-16 05:48:57,307 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 05:48:57" (1/1) ... [2023-12-16 05:48:57,321 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-16 05:48:57,437 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_2calls_4-1.c[946,959] [2023-12-16 05:48:57,440 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-16 05:48:57,447 INFO L202 MainTranslator]: Completed pre-run [2023-12-16 05:48:57,456 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_2calls_4-1.c[946,959] [2023-12-16 05:48:57,457 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-16 05:48:57,465 INFO L206 MainTranslator]: Completed translation [2023-12-16 05:48:57,465 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:48:57 WrapperNode [2023-12-16 05:48:57,465 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-16 05:48:57,466 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-16 05:48:57,466 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-16 05:48:57,466 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-16 05:48:57,470 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:48:57" (1/1) ... [2023-12-16 05:48:57,475 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:48:57" (1/1) ... [2023-12-16 05:48:57,486 INFO L138 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 20 [2023-12-16 05:48:57,486 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-16 05:48:57,487 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-16 05:48:57,487 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-16 05:48:57,487 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-16 05:48:57,495 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:48:57" (1/1) ... [2023-12-16 05:48:57,496 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:48:57" (1/1) ... [2023-12-16 05:48:57,496 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:48:57" (1/1) ... [2023-12-16 05:48:57,503 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2023-12-16 05:48:57,503 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:48:57" (1/1) ... [2023-12-16 05:48:57,503 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:48:57" (1/1) ... [2023-12-16 05:48:57,505 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:48:57" (1/1) ... [2023-12-16 05:48:57,506 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:48:57" (1/1) ... [2023-12-16 05:48:57,507 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:48:57" (1/1) ... [2023-12-16 05:48:57,507 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:48:57" (1/1) ... [2023-12-16 05:48:57,508 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-16 05:48:57,509 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-16 05:48:57,509 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-16 05:48:57,509 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-16 05:48:57,510 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:48:57" (1/1) ... [2023-12-16 05:48:57,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-16 05:48:57,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 05:48:57,537 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 05:48:57,539 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 05:48:57,559 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-16 05:48:57,559 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-16 05:48:57,560 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2023-12-16 05:48:57,560 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2023-12-16 05:48:57,560 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2023-12-16 05:48:57,560 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2023-12-16 05:48:57,561 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-16 05:48:57,561 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-16 05:48:57,610 INFO L241 CfgBuilder]: Building ICFG [2023-12-16 05:48:57,612 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-16 05:48:57,713 INFO L282 CfgBuilder]: Performing block encoding [2023-12-16 05:48:57,726 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-16 05:48:57,726 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-12-16 05:48:57,726 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 05:48:57 BoogieIcfgContainer [2023-12-16 05:48:57,726 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-16 05:48:57,728 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-16 05:48:57,729 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-16 05:48:57,731 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-16 05:48:57,731 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.12 05:48:57" (1/3) ... [2023-12-16 05:48:57,731 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7458733e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 05:48:57, skipping insertion in model container [2023-12-16 05:48:57,731 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:48:57" (2/3) ... [2023-12-16 05:48:57,731 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7458733e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 05:48:57, skipping insertion in model container [2023-12-16 05:48:57,731 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 05:48:57" (3/3) ... [2023-12-16 05:48:57,732 INFO L112 eAbstractionObserver]: Analyzing ICFG fibo_2calls_4-1.c [2023-12-16 05:48:57,743 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-16 05:48:57,743 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-16 05:48:57,770 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-16 05:48:57,774 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;@66f3d135, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-16 05:48:57,774 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-16 05:48:57,777 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-12-16 05:48:57,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-12-16 05:48:57,781 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 05:48:57,782 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 05:48:57,782 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 05:48:57,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 05:48:57,785 INFO L85 PathProgramCache]: Analyzing trace with hash -389521846, now seen corresponding path program 1 times [2023-12-16 05:48:57,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 05:48:57,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328528692] [2023-12-16 05:48:57,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 05:48:57,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 05:48:57,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:48:57,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-16 05:48:57,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:48:58,078 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 05:48:58,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 05:48:58,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328528692] [2023-12-16 05:48:58,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328528692] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-16 05:48:58,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-16 05:48:58,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-16 05:48:58,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925333005] [2023-12-16 05:48:58,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-16 05:48:58,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-16 05:48:58,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 05:48:58,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-16 05:48:58,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-16 05:48:58,104 INFO L87 Difference]: Start difference. First operand has 26 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-16 05:48:58,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 05:48:58,201 INFO L93 Difference]: Finished difference Result 34 states and 43 transitions. [2023-12-16 05:48:58,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-16 05:48:58,204 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2023-12-16 05:48:58,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 05:48:58,209 INFO L225 Difference]: With dead ends: 34 [2023-12-16 05:48:58,209 INFO L226 Difference]: Without dead ends: 26 [2023-12-16 05:48:58,211 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-12-16 05:48:58,213 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 12 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-16 05:48:58,214 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 73 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-16 05:48:58,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-12-16 05:48:58,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2023-12-16 05:48:58,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2023-12-16 05:48:58,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2023-12-16 05:48:58,256 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 9 [2023-12-16 05:48:58,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 05:48:58,256 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2023-12-16 05:48:58,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-16 05:48:58,256 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2023-12-16 05:48:58,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-12-16 05:48:58,258 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 05:48:58,258 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 05:48:58,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-16 05:48:58,258 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 05:48:58,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 05:48:58,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1524884472, now seen corresponding path program 1 times [2023-12-16 05:48:58,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 05:48:58,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578658775] [2023-12-16 05:48:58,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 05:48:58,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 05:48:58,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:48:58,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-16 05:48:58,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:48:58,358 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 05:48:58,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 05:48:58,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578658775] [2023-12-16 05:48:58,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578658775] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-16 05:48:58,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-16 05:48:58,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-16 05:48:58,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675203502] [2023-12-16 05:48:58,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-16 05:48:58,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-16 05:48:58,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 05:48:58,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-16 05:48:58,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-16 05:48:58,365 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-16 05:48:58,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 05:48:58,415 INFO L93 Difference]: Finished difference Result 32 states and 40 transitions. [2023-12-16 05:48:58,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-16 05:48:58,416 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2023-12-16 05:48:58,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 05:48:58,418 INFO L225 Difference]: With dead ends: 32 [2023-12-16 05:48:58,418 INFO L226 Difference]: Without dead ends: 28 [2023-12-16 05:48:58,419 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-12-16 05:48:58,421 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 10 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-16 05:48:58,423 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 70 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-16 05:48:58,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-12-16 05:48:58,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2023-12-16 05:48:58,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2023-12-16 05:48:58,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2023-12-16 05:48:58,432 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 10 [2023-12-16 05:48:58,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 05:48:58,433 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2023-12-16 05:48:58,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-16 05:48:58,434 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2023-12-16 05:48:58,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-12-16 05:48:58,435 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 05:48:58,435 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 05:48:58,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-16 05:48:58,436 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 05:48:58,437 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 05:48:58,437 INFO L85 PathProgramCache]: Analyzing trace with hash 741502751, now seen corresponding path program 1 times [2023-12-16 05:48:58,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 05:48:58,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60608507] [2023-12-16 05:48:58,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 05:48:58,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 05:48:58,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:48:58,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-16 05:48:58,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:48:58,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-16 05:48:58,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:48:58,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-16 05:48:58,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:48:58,538 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-16 05:48:58,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 05:48:58,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60608507] [2023-12-16 05:48:58,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60608507] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-16 05:48:58,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773774409] [2023-12-16 05:48:58,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 05:48:58,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 05:48:58,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 05:48:58,542 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 05:48:58,571 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 05:48:58,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:48:58,615 INFO L262 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-16 05:48:58,619 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 05:48:58,683 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-16 05:48:58,684 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 05:48:58,878 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-16 05:48:58,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773774409] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-16 05:48:58,884 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-16 05:48:58,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 13 [2023-12-16 05:48:58,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118651960] [2023-12-16 05:48:58,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-16 05:48:58,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-12-16 05:48:58,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 05:48:58,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-12-16 05:48:58,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2023-12-16 05:48:58,888 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand has 13 states, 10 states have (on average 3.1) internal successors, (31), 13 states have internal predecessors, (31), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 8 states have call successors, (8) [2023-12-16 05:48:59,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 05:48:59,024 INFO L93 Difference]: Finished difference Result 54 states and 74 transitions. [2023-12-16 05:48:59,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-16 05:48:59,024 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 10 states have (on average 3.1) internal successors, (31), 13 states have internal predecessors, (31), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 8 states have call successors, (8) Word has length 22 [2023-12-16 05:48:59,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 05:48:59,025 INFO L225 Difference]: With dead ends: 54 [2023-12-16 05:48:59,025 INFO L226 Difference]: Without dead ends: 30 [2023-12-16 05:48:59,026 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2023-12-16 05:48:59,026 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 28 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-16 05:48:59,026 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 96 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-16 05:48:59,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-12-16 05:48:59,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2023-12-16 05:48:59,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 20 states have internal predecessors, (22), 5 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2023-12-16 05:48:59,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2023-12-16 05:48:59,031 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 22 [2023-12-16 05:48:59,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 05:48:59,031 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2023-12-16 05:48:59,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 10 states have (on average 3.1) internal successors, (31), 13 states have internal predecessors, (31), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 8 states have call successors, (8) [2023-12-16 05:48:59,032 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2023-12-16 05:48:59,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-12-16 05:48:59,032 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 05:48:59,033 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 05:48:59,040 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 05:48:59,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 05:48:59,238 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 05:48:59,239 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 05:48:59,239 INFO L85 PathProgramCache]: Analyzing trace with hash 1785876995, now seen corresponding path program 1 times [2023-12-16 05:48:59,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 05:48:59,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429591051] [2023-12-16 05:48:59,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 05:48:59,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 05:48:59,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:48:59,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-16 05:48:59,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:48:59,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-16 05:48:59,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:48:59,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-12-16 05:48:59,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:48:59,372 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-16 05:48:59,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 05:48:59,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429591051] [2023-12-16 05:48:59,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429591051] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-16 05:48:59,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434935865] [2023-12-16 05:48:59,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 05:48:59,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 05:48:59,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 05:48:59,388 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 05:48:59,389 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 05:48:59,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:48:59,430 INFO L262 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-16 05:48:59,431 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 05:48:59,474 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-16 05:48:59,474 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 05:48:59,605 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-16 05:48:59,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434935865] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-16 05:48:59,606 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-16 05:48:59,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2023-12-16 05:48:59,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928328874] [2023-12-16 05:48:59,606 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-16 05:48:59,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-12-16 05:48:59,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 05:48:59,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-12-16 05:48:59,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2023-12-16 05:48:59,607 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand has 13 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 13 states have internal predecessors, (31), 7 states have call successors, (7), 1 states have call predecessors, (7), 3 states have return successors, (7), 3 states have call predecessors, (7), 7 states have call successors, (7) [2023-12-16 05:48:59,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 05:48:59,703 INFO L93 Difference]: Finished difference Result 50 states and 70 transitions. [2023-12-16 05:48:59,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-16 05:48:59,703 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 13 states have internal predecessors, (31), 7 states have call successors, (7), 1 states have call predecessors, (7), 3 states have return successors, (7), 3 states have call predecessors, (7), 7 states have call successors, (7) Word has length 23 [2023-12-16 05:48:59,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 05:48:59,705 INFO L225 Difference]: With dead ends: 50 [2023-12-16 05:48:59,705 INFO L226 Difference]: Without dead ends: 46 [2023-12-16 05:48:59,706 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2023-12-16 05:48:59,706 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 39 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-16 05:48:59,707 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 63 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-16 05:48:59,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2023-12-16 05:48:59,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2023-12-16 05:48:59,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 30 states have internal predecessors, (37), 9 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (15), 9 states have call predecessors, (15), 9 states have call successors, (15) [2023-12-16 05:48:59,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 61 transitions. [2023-12-16 05:48:59,713 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 61 transitions. Word has length 23 [2023-12-16 05:48:59,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 05:48:59,714 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 61 transitions. [2023-12-16 05:48:59,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 13 states have internal predecessors, (31), 7 states have call successors, (7), 1 states have call predecessors, (7), 3 states have return successors, (7), 3 states have call predecessors, (7), 7 states have call successors, (7) [2023-12-16 05:48:59,714 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 61 transitions. [2023-12-16 05:48:59,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-12-16 05:48:59,715 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 05:48:59,715 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 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 05:48:59,731 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 05:48:59,920 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,SelfDestructingSolverStorable3 [2023-12-16 05:48:59,920 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 05:48:59,920 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 05:48:59,920 INFO L85 PathProgramCache]: Analyzing trace with hash -1754399412, now seen corresponding path program 1 times [2023-12-16 05:48:59,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 05:48:59,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425014444] [2023-12-16 05:48:59,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 05:48:59,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 05:48:59,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:48:59,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-16 05:48:59,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:48:59,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-16 05:48:59,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:48:59,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-16 05:48:59,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:49:00,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-16 05:49:00,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:49:00,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-12-16 05:49:00,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:49:00,005 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-16 05:49:00,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 05:49:00,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425014444] [2023-12-16 05:49:00,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425014444] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-16 05:49:00,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559186153] [2023-12-16 05:49:00,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 05:49:00,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 05:49:00,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 05:49:00,006 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 05:49:00,011 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 05:49:00,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:49:00,041 INFO L262 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-16 05:49:00,042 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 05:49:00,093 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-16 05:49:00,093 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 05:49:00,317 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-16 05:49:00,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559186153] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-16 05:49:00,318 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-16 05:49:00,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 9] total 15 [2023-12-16 05:49:00,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472059492] [2023-12-16 05:49:00,318 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-16 05:49:00,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-12-16 05:49:00,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 05:49:00,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-12-16 05:49:00,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2023-12-16 05:49:00,321 INFO L87 Difference]: Start difference. First operand 44 states and 61 transitions. Second operand has 15 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 15 states have internal predecessors, (46), 11 states have call successors, (13), 1 states have call predecessors, (13), 5 states have return successors, (13), 3 states have call predecessors, (13), 11 states have call successors, (13) [2023-12-16 05:49:00,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 05:49:00,480 INFO L93 Difference]: Finished difference Result 104 states and 166 transitions. [2023-12-16 05:49:00,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-16 05:49:00,481 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 15 states have internal predecessors, (46), 11 states have call successors, (13), 1 states have call predecessors, (13), 5 states have return successors, (13), 3 states have call predecessors, (13), 11 states have call successors, (13) Word has length 35 [2023-12-16 05:49:00,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 05:49:00,482 INFO L225 Difference]: With dead ends: 104 [2023-12-16 05:49:00,482 INFO L226 Difference]: Without dead ends: 62 [2023-12-16 05:49:00,483 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 74 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2023-12-16 05:49:00,483 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 41 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-16 05:49:00,483 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 130 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-16 05:49:00,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2023-12-16 05:49:00,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2023-12-16 05:49:00,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 40 states have (on average 1.25) internal successors, (50), 43 states have internal predecessors, (50), 12 states have call successors, (12), 5 states have call predecessors, (12), 9 states have return successors, (29), 13 states have call predecessors, (29), 12 states have call successors, (29) [2023-12-16 05:49:00,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 91 transitions. [2023-12-16 05:49:00,491 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 91 transitions. Word has length 35 [2023-12-16 05:49:00,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 05:49:00,491 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 91 transitions. [2023-12-16 05:49:00,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 15 states have internal predecessors, (46), 11 states have call successors, (13), 1 states have call predecessors, (13), 5 states have return successors, (13), 3 states have call predecessors, (13), 11 states have call successors, (13) [2023-12-16 05:49:00,492 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 91 transitions. [2023-12-16 05:49:00,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-12-16 05:49:00,493 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 05:49:00,493 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 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 05:49:00,504 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-16 05:49:00,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 05:49:00,705 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 05:49:00,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 05:49:00,706 INFO L85 PathProgramCache]: Analyzing trace with hash 2101254926, now seen corresponding path program 1 times [2023-12-16 05:49:00,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 05:49:00,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283061145] [2023-12-16 05:49:00,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 05:49:00,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 05:49:00,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:49:00,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-16 05:49:00,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:49:00,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-16 05:49:00,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:49:00,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-16 05:49:00,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:49:00,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-12-16 05:49:00,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:49:00,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-12-16 05:49:00,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:49:00,856 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-16 05:49:00,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 05:49:00,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283061145] [2023-12-16 05:49:00,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283061145] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-16 05:49:00,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597565347] [2023-12-16 05:49:00,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 05:49:00,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 05:49:00,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 05:49:00,873 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 05:49:00,897 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 05:49:00,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:49:00,909 INFO L262 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-16 05:49:00,910 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 05:49:01,015 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-16 05:49:01,015 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 05:49:01,261 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-16 05:49:01,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597565347] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-16 05:49:01,262 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-16 05:49:01,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9] total 17 [2023-12-16 05:49:01,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965567851] [2023-12-16 05:49:01,262 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-16 05:49:01,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-12-16 05:49:01,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 05:49:01,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-12-16 05:49:01,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2023-12-16 05:49:01,263 INFO L87 Difference]: Start difference. First operand 62 states and 91 transitions. Second operand has 17 states, 16 states have (on average 3.0) internal successors, (48), 17 states have internal predecessors, (48), 10 states have call successors, (12), 1 states have call predecessors, (12), 7 states have return successors, (12), 6 states have call predecessors, (12), 10 states have call successors, (12) [2023-12-16 05:49:01,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 05:49:01,466 INFO L93 Difference]: Finished difference Result 176 states and 320 transitions. [2023-12-16 05:49:01,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-12-16 05:49:01,467 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.0) internal successors, (48), 17 states have internal predecessors, (48), 10 states have call successors, (12), 1 states have call predecessors, (12), 7 states have return successors, (12), 6 states have call predecessors, (12), 10 states have call successors, (12) Word has length 36 [2023-12-16 05:49:01,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 05:49:01,468 INFO L225 Difference]: With dead ends: 176 [2023-12-16 05:49:01,468 INFO L226 Difference]: Without dead ends: 116 [2023-12-16 05:49:01,470 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 76 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=117, Invalid=483, Unknown=0, NotChecked=0, Total=600 [2023-12-16 05:49:01,470 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 43 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-16 05:49:01,470 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 180 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-16 05:49:01,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2023-12-16 05:49:01,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 102. [2023-12-16 05:49:01,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 65 states have (on average 1.2153846153846153) internal successors, (79), 68 states have internal predecessors, (79), 21 states have call successors, (21), 7 states have call predecessors, (21), 15 states have return successors, (65), 26 states have call predecessors, (65), 21 states have call successors, (65) [2023-12-16 05:49:01,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 165 transitions. [2023-12-16 05:49:01,484 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 165 transitions. Word has length 36 [2023-12-16 05:49:01,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 05:49:01,485 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 165 transitions. [2023-12-16 05:49:01,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.0) internal successors, (48), 17 states have internal predecessors, (48), 10 states have call successors, (12), 1 states have call predecessors, (12), 7 states have return successors, (12), 6 states have call predecessors, (12), 10 states have call successors, (12) [2023-12-16 05:49:01,485 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 165 transitions. [2023-12-16 05:49:01,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-12-16 05:49:01,487 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 05:49:01,487 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 05:49:01,495 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 05:49:01,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 05:49:01,692 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 05:49:01,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 05:49:01,692 INFO L85 PathProgramCache]: Analyzing trace with hash 644290867, now seen corresponding path program 1 times [2023-12-16 05:49:01,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 05:49:01,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381073000] [2023-12-16 05:49:01,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 05:49:01,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 05:49:01,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:49:01,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-16 05:49:01,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:49:01,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-16 05:49:01,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:49:01,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-16 05:49:01,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:49:01,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-16 05:49:01,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:49:01,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-12-16 05:49:01,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:49:01,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-12-16 05:49:01,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:49:01,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-12-16 05:49:01,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:49:01,795 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-12-16 05:49:01,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 05:49:01,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381073000] [2023-12-16 05:49:01,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381073000] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-16 05:49:01,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732557060] [2023-12-16 05:49:01,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 05:49:01,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 05:49:01,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 05:49:01,797 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 05:49:01,825 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 05:49:01,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:49:01,836 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-16 05:49:01,837 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 05:49:01,891 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-12-16 05:49:01,891 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 05:49:02,135 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-12-16 05:49:02,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732557060] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-16 05:49:02,136 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-16 05:49:02,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 16 [2023-12-16 05:49:02,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712265376] [2023-12-16 05:49:02,136 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-16 05:49:02,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-12-16 05:49:02,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 05:49:02,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-12-16 05:49:02,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2023-12-16 05:49:02,137 INFO L87 Difference]: Start difference. First operand 102 states and 165 transitions. Second operand has 16 states, 15 states have (on average 3.466666666666667) internal successors, (52), 16 states have internal predecessors, (52), 10 states have call successors, (15), 1 states have call predecessors, (15), 6 states have return successors, (17), 9 states have call predecessors, (17), 10 states have call successors, (17) [2023-12-16 05:49:02,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 05:49:02,337 INFO L93 Difference]: Finished difference Result 261 states and 507 transitions. [2023-12-16 05:49:02,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-12-16 05:49:02,338 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.466666666666667) internal successors, (52), 16 states have internal predecessors, (52), 10 states have call successors, (15), 1 states have call predecessors, (15), 6 states have return successors, (17), 9 states have call predecessors, (17), 10 states have call successors, (17) Word has length 50 [2023-12-16 05:49:02,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 05:49:02,339 INFO L225 Difference]: With dead ends: 261 [2023-12-16 05:49:02,339 INFO L226 Difference]: Without dead ends: 161 [2023-12-16 05:49:02,340 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 108 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2023-12-16 05:49:02,341 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 32 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-16 05:49:02,341 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 181 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-16 05:49:02,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2023-12-16 05:49:02,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 138. [2023-12-16 05:49:02,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 88 states have (on average 1.2045454545454546) internal successors, (106), 90 states have internal predecessors, (106), 31 states have call successors, (31), 10 states have call predecessors, (31), 18 states have return successors, (103), 37 states have call predecessors, (103), 31 states have call successors, (103) [2023-12-16 05:49:02,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 240 transitions. [2023-12-16 05:49:02,356 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 240 transitions. Word has length 50 [2023-12-16 05:49:02,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 05:49:02,357 INFO L495 AbstractCegarLoop]: Abstraction has 138 states and 240 transitions. [2023-12-16 05:49:02,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.466666666666667) internal successors, (52), 16 states have internal predecessors, (52), 10 states have call successors, (15), 1 states have call predecessors, (15), 6 states have return successors, (17), 9 states have call predecessors, (17), 10 states have call successors, (17) [2023-12-16 05:49:02,357 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 240 transitions. [2023-12-16 05:49:02,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-12-16 05:49:02,358 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 05:49:02,359 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 05:49:02,365 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-12-16 05:49:02,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 05:49:02,564 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 05:49:02,564 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 05:49:02,564 INFO L85 PathProgramCache]: Analyzing trace with hash -1667877015, now seen corresponding path program 1 times [2023-12-16 05:49:02,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 05:49:02,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001532426] [2023-12-16 05:49:02,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 05:49:02,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 05:49:02,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:49:02,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-16 05:49:02,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:49:02,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-16 05:49:02,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:49:02,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-16 05:49:02,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:49:02,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-16 05:49:02,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:49:02,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-12-16 05:49:02,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:49:02,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-12-16 05:49:02,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:49:02,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-12-16 05:49:02,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:49:02,704 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 19 proven. 11 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-12-16 05:49:02,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 05:49:02,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001532426] [2023-12-16 05:49:02,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001532426] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-16 05:49:02,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630195088] [2023-12-16 05:49:02,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 05:49:02,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 05:49:02,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 05:49:02,706 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 05:49:02,750 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 05:49:02,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:49:02,763 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-16 05:49:02,764 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 05:49:02,799 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 18 proven. 5 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-12-16 05:49:02,800 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 05:49:02,952 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 18 proven. 5 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-12-16 05:49:02,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630195088] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-16 05:49:02,952 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-16 05:49:02,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7, 7] total 17 [2023-12-16 05:49:02,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121642362] [2023-12-16 05:49:02,953 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-16 05:49:02,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-12-16 05:49:02,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 05:49:02,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-12-16 05:49:02,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2023-12-16 05:49:02,954 INFO L87 Difference]: Start difference. First operand 138 states and 240 transitions. Second operand has 17 states, 16 states have (on average 3.25) internal successors, (52), 17 states have internal predecessors, (52), 8 states have call successors, (14), 1 states have call predecessors, (14), 6 states have return successors, (16), 10 states have call predecessors, (16), 8 states have call successors, (16) [2023-12-16 05:49:03,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 05:49:03,128 INFO L93 Difference]: Finished difference Result 300 states and 579 transitions. [2023-12-16 05:49:03,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-12-16 05:49:03,128 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.25) internal successors, (52), 17 states have internal predecessors, (52), 8 states have call successors, (14), 1 states have call predecessors, (14), 6 states have return successors, (16), 10 states have call predecessors, (16), 8 states have call successors, (16) Word has length 51 [2023-12-16 05:49:03,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 05:49:03,129 INFO L225 Difference]: With dead ends: 300 [2023-12-16 05:49:03,129 INFO L226 Difference]: Without dead ends: 97 [2023-12-16 05:49:03,131 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 107 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2023-12-16 05:49:03,131 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 56 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-16 05:49:03,131 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 147 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-16 05:49:03,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2023-12-16 05:49:03,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 79. [2023-12-16 05:49:03,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 51 states have (on average 1.1764705882352942) internal successors, (60), 53 states have internal predecessors, (60), 16 states have call successors, (16), 6 states have call predecessors, (16), 11 states have return successors, (46), 19 states have call predecessors, (46), 16 states have call successors, (46) [2023-12-16 05:49:03,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 122 transitions. [2023-12-16 05:49:03,139 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 122 transitions. Word has length 51 [2023-12-16 05:49:03,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 05:49:03,139 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 122 transitions. [2023-12-16 05:49:03,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.25) internal successors, (52), 17 states have internal predecessors, (52), 8 states have call successors, (14), 1 states have call predecessors, (14), 6 states have return successors, (16), 10 states have call predecessors, (16), 8 states have call successors, (16) [2023-12-16 05:49:03,139 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 122 transitions. [2023-12-16 05:49:03,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-12-16 05:49:03,141 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 05:49:03,141 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 05:49:03,147 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 05:49:03,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 05:49:03,346 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 05:49:03,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 05:49:03,346 INFO L85 PathProgramCache]: Analyzing trace with hash -680250868, now seen corresponding path program 2 times [2023-12-16 05:49:03,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 05:49:03,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084801682] [2023-12-16 05:49:03,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 05:49:03,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 05:49:03,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:49:03,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-16 05:49:03,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:49:03,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-16 05:49:03,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:49:03,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-16 05:49:03,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:49:03,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-16 05:49:03,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:49:03,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-12-16 05:49:03,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:49:03,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-12-16 05:49:03,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:49:03,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-12-16 05:49:03,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:49:03,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-16 05:49:03,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:49:03,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-12-16 05:49:03,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:49:03,519 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 37 proven. 23 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-12-16 05:49:03,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 05:49:03,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084801682] [2023-12-16 05:49:03,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084801682] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-16 05:49:03,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170702263] [2023-12-16 05:49:03,519 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-16 05:49:03,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 05:49:03,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 05:49:03,520 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 05:49:03,564 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 05:49:03,578 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-16 05:49:03,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-16 05:49:03,579 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-16 05:49:03,580 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 05:49:03,633 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 38 proven. 8 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-12-16 05:49:03,634 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 05:49:03,875 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 38 proven. 9 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-12-16 05:49:03,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170702263] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-16 05:49:03,876 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-16 05:49:03,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8, 9] total 22 [2023-12-16 05:49:03,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782896596] [2023-12-16 05:49:03,876 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-16 05:49:03,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-12-16 05:49:03,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 05:49:03,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-12-16 05:49:03,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2023-12-16 05:49:03,878 INFO L87 Difference]: Start difference. First operand 79 states and 122 transitions. Second operand has 22 states, 21 states have (on average 3.238095238095238) internal successors, (68), 22 states have internal predecessors, (68), 12 states have call successors, (19), 1 states have call predecessors, (19), 9 states have return successors, (22), 14 states have call predecessors, (22), 12 states have call successors, (22) [2023-12-16 05:49:04,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 05:49:04,133 INFO L93 Difference]: Finished difference Result 170 states and 289 transitions. [2023-12-16 05:49:04,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-12-16 05:49:04,133 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 3.238095238095238) internal successors, (68), 22 states have internal predecessors, (68), 12 states have call successors, (19), 1 states have call predecessors, (19), 9 states have return successors, (22), 14 states have call predecessors, (22), 12 states have call successors, (22) Word has length 65 [2023-12-16 05:49:04,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 05:49:04,134 INFO L225 Difference]: With dead ends: 170 [2023-12-16 05:49:04,134 INFO L226 Difference]: Without dead ends: 85 [2023-12-16 05:49:04,135 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 137 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=161, Invalid=769, Unknown=0, NotChecked=0, Total=930 [2023-12-16 05:49:04,136 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 75 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 399 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-16 05:49:04,136 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 236 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 399 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-16 05:49:04,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2023-12-16 05:49:04,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 76. [2023-12-16 05:49:04,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 52 states have (on average 1.1538461538461537) internal successors, (60), 51 states have internal predecessors, (60), 12 states have call successors, (12), 8 states have call predecessors, (12), 11 states have return successors, (31), 16 states have call predecessors, (31), 12 states have call successors, (31) [2023-12-16 05:49:04,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 103 transitions. [2023-12-16 05:49:04,142 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 103 transitions. Word has length 65 [2023-12-16 05:49:04,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 05:49:04,142 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 103 transitions. [2023-12-16 05:49:04,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 3.238095238095238) internal successors, (68), 22 states have internal predecessors, (68), 12 states have call successors, (19), 1 states have call predecessors, (19), 9 states have return successors, (22), 14 states have call predecessors, (22), 12 states have call successors, (22) [2023-12-16 05:49:04,143 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 103 transitions. [2023-12-16 05:49:04,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-12-16 05:49:04,143 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 05:49:04,143 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 05:49:04,168 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 05:49:04,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 05:49:04,353 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 05:49:04,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 05:49:04,353 INFO L85 PathProgramCache]: Analyzing trace with hash -1164844098, now seen corresponding path program 1 times [2023-12-16 05:49:04,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 05:49:04,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762399635] [2023-12-16 05:49:04,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 05:49:04,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 05:49:04,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:49:04,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-16 05:49:04,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:49:04,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-16 05:49:04,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:49:04,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-16 05:49:04,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:49:04,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-16 05:49:04,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:49:04,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-12-16 05:49:04,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:49:04,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-12-16 05:49:04,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:49:04,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-12-16 05:49:04,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:49:04,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-16 05:49:04,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:49:04,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-12-16 05:49:04,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:49:04,724 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2023-12-16 05:49:04,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 05:49:04,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762399635] [2023-12-16 05:49:04,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762399635] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-16 05:49:04,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544997210] [2023-12-16 05:49:04,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 05:49:04,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 05:49:04,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 05:49:04,742 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-16 05:49:04,766 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-16 05:49:04,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:49:04,786 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 39 conjunts are in the unsatisfiable core [2023-12-16 05:49:04,788 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 05:49:04,871 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2023-12-16 05:49:04,871 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 05:49:05,017 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2023-12-16 05:49:05,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544997210] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-16 05:49:05,018 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-16 05:49:05,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 21 [2023-12-16 05:49:05,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372493939] [2023-12-16 05:49:05,018 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-16 05:49:05,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-12-16 05:49:05,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 05:49:05,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-12-16 05:49:05,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2023-12-16 05:49:05,019 INFO L87 Difference]: Start difference. First operand 76 states and 103 transitions. Second operand has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 12 states have internal predecessors, (31), 4 states have call successors, (6), 1 states have call predecessors, (6), 6 states have return successors, (12), 12 states have call predecessors, (12), 4 states have call successors, (12) [2023-12-16 05:49:05,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 05:49:05,104 INFO L93 Difference]: Finished difference Result 93 states and 127 transitions. [2023-12-16 05:49:05,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-12-16 05:49:05,104 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 12 states have internal predecessors, (31), 4 states have call successors, (6), 1 states have call predecessors, (6), 6 states have return successors, (12), 12 states have call predecessors, (12), 4 states have call successors, (12) Word has length 64 [2023-12-16 05:49:05,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 05:49:05,105 INFO L225 Difference]: With dead ends: 93 [2023-12-16 05:49:05,105 INFO L226 Difference]: Without dead ends: 89 [2023-12-16 05:49:05,106 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2023-12-16 05:49:05,106 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 0 mSDsluCounter, 579 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 615 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-16 05:49:05,106 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 615 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-16 05:49:05,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2023-12-16 05:49:05,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 86. [2023-12-16 05:49:05,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 58 states have (on average 1.1379310344827587) internal successors, (66), 57 states have internal predecessors, (66), 14 states have call successors, (14), 8 states have call predecessors, (14), 13 states have return successors, (38), 20 states have call predecessors, (38), 14 states have call successors, (38) [2023-12-16 05:49:05,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 118 transitions. [2023-12-16 05:49:05,111 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 118 transitions. Word has length 64 [2023-12-16 05:49:05,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 05:49:05,118 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 118 transitions. [2023-12-16 05:49:05,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 12 states have internal predecessors, (31), 4 states have call successors, (6), 1 states have call predecessors, (6), 6 states have return successors, (12), 12 states have call predecessors, (12), 4 states have call successors, (12) [2023-12-16 05:49:05,118 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 118 transitions. [2023-12-16 05:49:05,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-12-16 05:49:05,119 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 05:49:05,119 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 05:49:05,126 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-12-16 05:49:05,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-12-16 05:49:05,324 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 05:49:05,325 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 05:49:05,325 INFO L85 PathProgramCache]: Analyzing trace with hash -976355400, now seen corresponding path program 1 times [2023-12-16 05:49:05,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 05:49:05,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672973588] [2023-12-16 05:49:05,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 05:49:05,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 05:49:05,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:49:05,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-16 05:49:05,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:49:05,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-16 05:49:05,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:49:05,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-16 05:49:05,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:49:05,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-16 05:49:05,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:49:05,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-12-16 05:49:05,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:49:05,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-12-16 05:49:05,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:49:05,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-12-16 05:49:05,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:49:05,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-16 05:49:05,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:49:05,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-12-16 05:49:05,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:49:05,413 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 17 proven. 21 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-12-16 05:49:05,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 05:49:05,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672973588] [2023-12-16 05:49:05,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672973588] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-16 05:49:05,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232564132] [2023-12-16 05:49:05,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 05:49:05,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 05:49:05,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 05:49:05,414 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-16 05:49:05,448 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-16 05:49:05,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:49:05,500 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-16 05:49:05,501 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 05:49:05,556 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 17 proven. 33 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-12-16 05:49:05,556 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 05:49:05,885 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 19 proven. 35 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-12-16 05:49:05,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232564132] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-16 05:49:05,885 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-16 05:49:05,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 11] total 17 [2023-12-16 05:49:05,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239061890] [2023-12-16 05:49:05,886 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-16 05:49:05,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-12-16 05:49:05,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 05:49:05,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-12-16 05:49:05,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2023-12-16 05:49:05,887 INFO L87 Difference]: Start difference. First operand 86 states and 118 transitions. Second operand has 17 states, 16 states have (on average 3.75) internal successors, (60), 17 states have internal predecessors, (60), 11 states have call successors, (16), 1 states have call predecessors, (16), 7 states have return successors, (20), 8 states have call predecessors, (20), 11 states have call successors, (20) [2023-12-16 05:49:06,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 05:49:06,000 INFO L93 Difference]: Finished difference Result 158 states and 233 transitions. [2023-12-16 05:49:06,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-16 05:49:06,001 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.75) internal successors, (60), 17 states have internal predecessors, (60), 11 states have call successors, (16), 1 states have call predecessors, (16), 7 states have return successors, (20), 8 states have call predecessors, (20), 11 states have call successors, (20) Word has length 65 [2023-12-16 05:49:06,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 05:49:06,002 INFO L225 Difference]: With dead ends: 158 [2023-12-16 05:49:06,002 INFO L226 Difference]: Without dead ends: 0 [2023-12-16 05:49:06,003 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 139 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2023-12-16 05:49:06,003 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 32 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-16 05:49:06,004 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 148 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-16 05:49:06,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-12-16 05:49:06,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-12-16 05:49:06,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 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 05:49:06,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-12-16 05:49:06,005 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 65 [2023-12-16 05:49:06,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 05:49:06,005 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-12-16 05:49:06,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.75) internal successors, (60), 17 states have internal predecessors, (60), 11 states have call successors, (16), 1 states have call predecessors, (16), 7 states have return successors, (20), 8 states have call predecessors, (20), 11 states have call successors, (20) [2023-12-16 05:49:06,005 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-12-16 05:49:06,006 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-12-16 05:49:06,007 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-16 05:49:06,024 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-12-16 05:49:06,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 05:49:06,210 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2023-12-16 05:49:06,424 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2023-12-16 05:49:06,424 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 41) no Hoare annotation was computed. [2023-12-16 05:49:06,424 INFO L899 garLoopResultBuilder]: For program point $Ultimate##0(line -1) no Hoare annotation was computed. [2023-12-16 05:49:06,424 INFO L899 garLoopResultBuilder]: For program point L41(line 41) no Hoare annotation was computed. [2023-12-16 05:49:06,424 INFO L899 garLoopResultBuilder]: For program point L40(lines 40 42) no Hoare annotation was computed. [2023-12-16 05:49:06,424 INFO L895 garLoopResultBuilder]: At program point L39(line 39) the Hoare annotation is: (= |ULTIMATE.start_main_~x~0#1| 4) [2023-12-16 05:49:06,425 INFO L899 garLoopResultBuilder]: For program point L39-1(line 39) no Hoare annotation was computed. [2023-12-16 05:49:06,425 INFO L899 garLoopResultBuilder]: For program point L40-2(lines 40 42) no Hoare annotation was computed. [2023-12-16 05:49:06,425 INFO L895 garLoopResultBuilder]: At program point L25(line 25) the Hoare annotation is: (and (<= 2 fibo2_~n) (= fibo2_~n |fibo2_#in~n|)) [2023-12-16 05:49:06,425 INFO L899 garLoopResultBuilder]: For program point L25-1(line 25) no Hoare annotation was computed. [2023-12-16 05:49:06,425 INFO L895 garLoopResultBuilder]: At program point L25-2(line 25) the Hoare annotation is: (and (= fibo2_~n |fibo2_#in~n|) (or (and (= |fibo2_#t~ret6| 1) (= 2 |fibo2_#in~n|)) (< 3 |fibo2_#in~n|))) [2023-12-16 05:49:06,425 INFO L899 garLoopResultBuilder]: For program point L22(lines 22 26) no Hoare annotation was computed. [2023-12-16 05:49:06,425 INFO L899 garLoopResultBuilder]: For program point L25-3(line 25) no Hoare annotation was computed. [2023-12-16 05:49:06,425 INFO L899 garLoopResultBuilder]: For program point L20(lines 20 26) no Hoare annotation was computed. [2023-12-16 05:49:06,425 INFO L899 garLoopResultBuilder]: For program point fibo2FINAL(lines 19 27) no Hoare annotation was computed. [2023-12-16 05:49:06,425 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 19 27) the Hoare annotation is: true [2023-12-16 05:49:06,425 INFO L899 garLoopResultBuilder]: For program point fibo2EXIT(lines 19 27) no Hoare annotation was computed. [2023-12-16 05:49:06,425 INFO L895 garLoopResultBuilder]: At program point L15(line 15) the Hoare annotation is: (and (= fibo1_~n |fibo1_#in~n|) (< 2 |fibo1_#in~n|)) [2023-12-16 05:49:06,425 INFO L899 garLoopResultBuilder]: For program point L15-1(line 15) no Hoare annotation was computed. [2023-12-16 05:49:06,425 INFO L895 garLoopResultBuilder]: At program point L15-2(line 15) the Hoare annotation is: (and (let ((.cse0 (= fibo1_~n |fibo1_#in~n|))) (or (and (= 2 |fibo1_#t~ret4|) (= |fibo1_#in~n| 4) (= fibo1_~n 4)) (and (= |fibo1_#t~ret4| 1) (<= |fibo1_#in~n| 3) .cse0) (and (<= 5 |fibo1_#in~n|) .cse0))) (< 2 |fibo1_#in~n|)) [2023-12-16 05:49:06,426 INFO L899 garLoopResultBuilder]: For program point L12(lines 12 16) no Hoare annotation was computed. [2023-12-16 05:49:06,426 INFO L899 garLoopResultBuilder]: For program point L15-3(line 15) no Hoare annotation was computed. [2023-12-16 05:49:06,426 INFO L899 garLoopResultBuilder]: For program point fibo1FINAL(lines 9 17) no Hoare annotation was computed. [2023-12-16 05:49:06,426 INFO L899 garLoopResultBuilder]: For program point L10(lines 10 16) no Hoare annotation was computed. [2023-12-16 05:49:06,426 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 9 17) the Hoare annotation is: true [2023-12-16 05:49:06,426 INFO L899 garLoopResultBuilder]: For program point fibo1EXIT(lines 9 17) no Hoare annotation was computed. [2023-12-16 05:49:06,428 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 05:49:06,429 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-12-16 05:49:06,432 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.12 05:49:06 BoogieIcfgContainer [2023-12-16 05:49:06,432 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-16 05:49:06,433 INFO L158 Benchmark]: Toolchain (without parser) took 9132.23ms. Allocated memory was 188.7MB in the beginning and 345.0MB in the end (delta: 156.2MB). Free memory was 121.9MB in the beginning and 138.4MB in the end (delta: -16.5MB). Peak memory consumption was 140.5MB. Max. memory is 8.0GB. [2023-12-16 05:49:06,433 INFO L158 Benchmark]: CDTParser took 0.54ms. Allocated memory is still 188.7MB. Free memory is still 137.5MB. There was no memory consumed. Max. memory is 8.0GB. [2023-12-16 05:49:06,433 INFO L158 Benchmark]: CACSL2BoogieTranslator took 163.16ms. Allocated memory is still 188.7MB. Free memory was 121.6MB in the beginning and 110.8MB in the end (delta: 10.9MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-12-16 05:49:06,433 INFO L158 Benchmark]: Boogie Procedure Inliner took 20.62ms. Allocated memory is still 188.7MB. Free memory was 110.8MB in the beginning and 109.6MB in the end (delta: 1.2MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-12-16 05:49:06,433 INFO L158 Benchmark]: Boogie Preprocessor took 21.18ms. Allocated memory is still 188.7MB. Free memory was 109.6MB in the beginning and 108.0MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-12-16 05:49:06,434 INFO L158 Benchmark]: RCFGBuilder took 217.77ms. Allocated memory is still 188.7MB. Free memory was 108.0MB in the beginning and 97.1MB in the end (delta: 10.9MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-12-16 05:49:06,434 INFO L158 Benchmark]: TraceAbstraction took 8703.97ms. Allocated memory was 188.7MB in the beginning and 345.0MB in the end (delta: 156.2MB). Free memory was 96.5MB in the beginning and 138.4MB in the end (delta: -42.0MB). Peak memory consumption was 115.3MB. Max. memory is 8.0GB. [2023-12-16 05:49:06,435 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.54ms. Allocated memory is still 188.7MB. Free memory is still 137.5MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 163.16ms. Allocated memory is still 188.7MB. Free memory was 121.6MB in the beginning and 110.8MB in the end (delta: 10.9MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 20.62ms. Allocated memory is still 188.7MB. Free memory was 110.8MB in the beginning and 109.6MB in the end (delta: 1.2MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 21.18ms. Allocated memory is still 188.7MB. Free memory was 109.6MB in the beginning and 108.0MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 217.77ms. Allocated memory is still 188.7MB. Free memory was 108.0MB in the beginning and 97.1MB in the end (delta: 10.9MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * TraceAbstraction took 8703.97ms. Allocated memory was 188.7MB in the beginning and 345.0MB in the end (delta: 156.2MB). Free memory was 96.5MB in the beginning and 138.4MB in the end (delta: -42.0MB). Peak memory consumption was 115.3MB. 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 - PositiveResult [Line: 41]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 26 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 8.7s, OverallIterations: 11, TraceHistogramMax: 5, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 1.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 435 SdHoareTripleChecker+Valid, 1.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 368 mSDsluCounter, 1939 SdHoareTripleChecker+Invalid, 0.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1668 mSDsCounter, 258 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2016 IncrementalHoareTripleChecker+Invalid, 2274 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 258 mSolverCounterUnsat, 271 mSDtfsCounter, 2016 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1091 GetRequests, 876 SyntacticMatches, 27 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 677 ImplicationChecksByTransitivity, 1.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=138occurred in iteration=7, InterpolantAutomatonStates: 141, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 11 MinimizatonAttempts, 73 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 400 PreInvPairs, 485 NumberOfFragments, 66 HoareAnnotationTreeSize, 400 FormulaSimplifications, 1751 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 7 FormulaSimplificationsInter, 613 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 4.0s InterpolantComputationTime, 841 NumberOfCodeBlocks, 841 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 1223 ConstructedInterpolants, 0 QuantifiedInterpolants, 2635 SizeOfPredicates, 22 NumberOfNonLiveVariables, 1101 ConjunctsInSsa, 99 ConjunctsInUnsatCore, 29 InterpolantComputations, 2 PerfectInterpolantSequences, 816/1143 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-12-16 05:49:06,472 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...