/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/MultCommutative-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-16 05:47:31,935 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-16 05:47:32,022 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 05:47:32,028 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-16 05:47:32,028 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-16 05:47:32,051 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-16 05:47:32,052 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-16 05:47:32,052 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-16 05:47:32,053 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-16 05:47:32,056 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-16 05:47:32,057 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-16 05:47:32,057 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-16 05:47:32,058 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-16 05:47:32,059 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-16 05:47:32,059 INFO L153 SettingsManager]: * Use SBE=true [2023-12-16 05:47:32,059 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-16 05:47:32,059 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-16 05:47:32,061 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-16 05:47:32,061 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-16 05:47:32,061 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-16 05:47:32,061 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-16 05:47:32,062 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-16 05:47:32,062 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-16 05:47:32,062 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-16 05:47:32,062 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-16 05:47:32,062 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-16 05:47:32,063 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-16 05:47:32,063 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-16 05:47:32,063 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-16 05:47:32,063 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-16 05:47:32,064 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-16 05:47:32,064 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-16 05:47:32,065 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-16 05:47:32,065 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-16 05:47:32,065 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-16 05:47:32,065 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-16 05:47:32,065 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-16 05:47:32,065 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-16 05:47:32,066 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-16 05:47:32,066 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-16 05:47:32,066 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-16 05:47:32,066 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-16 05:47:32,066 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-16 05:47:32,066 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> false [2023-12-16 05:47:32,285 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-16 05:47:32,309 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-16 05:47:32,311 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-16 05:47:32,312 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-16 05:47:32,313 INFO L274 PluginConnector]: CDTParser initialized [2023-12-16 05:47:32,314 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/MultCommutative-2.c [2023-12-16 05:47:33,528 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-16 05:47:33,706 INFO L384 CDTParser]: Found 1 translation units. [2023-12-16 05:47:33,707 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/MultCommutative-2.c [2023-12-16 05:47:33,712 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ca131af85/0385a057220b42149ae91a399ec74d36/FLAG2a241023e [2023-12-16 05:47:33,723 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ca131af85/0385a057220b42149ae91a399ec74d36 [2023-12-16 05:47:33,725 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-16 05:47:33,726 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-16 05:47:33,727 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-16 05:47:33,727 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-16 05:47:33,736 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-16 05:47:33,736 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 05:47:33" (1/1) ... [2023-12-16 05:47:33,737 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18413d77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:47:33, skipping insertion in model container [2023-12-16 05:47:33,737 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 05:47:33" (1/1) ... [2023-12-16 05:47:33,756 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-16 05:47:33,880 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/MultCommutative-2.c[970,983] [2023-12-16 05:47:33,883 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-16 05:47:33,894 INFO L202 MainTranslator]: Completed pre-run [2023-12-16 05:47:33,907 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/MultCommutative-2.c[970,983] [2023-12-16 05:47:33,908 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-16 05:47:33,920 INFO L206 MainTranslator]: Completed translation [2023-12-16 05:47:33,921 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:47:33 WrapperNode [2023-12-16 05:47:33,921 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-16 05:47:33,923 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-16 05:47:33,923 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-16 05:47:33,923 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-16 05:47:33,930 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:47:33" (1/1) ... [2023-12-16 05:47:33,935 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:47:33" (1/1) ... [2023-12-16 05:47:33,953 INFO L138 Inliner]: procedures = 13, calls = 11, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 37 [2023-12-16 05:47:33,953 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-16 05:47:33,954 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-16 05:47:33,954 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-16 05:47:33,954 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-16 05:47:33,963 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:47:33" (1/1) ... [2023-12-16 05:47:33,963 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:47:33" (1/1) ... [2023-12-16 05:47:33,964 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:47:33" (1/1) ... [2023-12-16 05:47:33,981 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 05:47:33,982 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:47:33" (1/1) ... [2023-12-16 05:47:33,982 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:47:33" (1/1) ... [2023-12-16 05:47:33,984 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:47:33" (1/1) ... [2023-12-16 05:47:33,986 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:47:33" (1/1) ... [2023-12-16 05:47:33,987 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:47:33" (1/1) ... [2023-12-16 05:47:33,987 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:47:33" (1/1) ... [2023-12-16 05:47:33,988 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-16 05:47:33,989 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-16 05:47:33,989 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-16 05:47:33,989 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-16 05:47:33,990 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:47:33" (1/1) ... [2023-12-16 05:47:34,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-16 05:47:34,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 05:47:34,025 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 05:47:34,033 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 05:47:34,058 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-16 05:47:34,058 INFO L130 BoogieDeclarations]: Found specification of procedure mult [2023-12-16 05:47:34,059 INFO L138 BoogieDeclarations]: Found implementation of procedure mult [2023-12-16 05:47:34,059 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-16 05:47:34,059 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-16 05:47:34,059 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-16 05:47:34,123 INFO L241 CfgBuilder]: Building ICFG [2023-12-16 05:47:34,125 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-16 05:47:34,283 INFO L282 CfgBuilder]: Performing block encoding [2023-12-16 05:47:34,300 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-16 05:47:34,302 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-12-16 05:47:34,302 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 05:47:34 BoogieIcfgContainer [2023-12-16 05:47:34,302 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-16 05:47:34,305 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-16 05:47:34,305 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-16 05:47:34,308 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-16 05:47:34,308 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.12 05:47:33" (1/3) ... [2023-12-16 05:47:34,309 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66c4e7df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 05:47:34, skipping insertion in model container [2023-12-16 05:47:34,310 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:47:33" (2/3) ... [2023-12-16 05:47:34,310 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66c4e7df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 05:47:34, skipping insertion in model container [2023-12-16 05:47:34,310 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 05:47:34" (3/3) ... [2023-12-16 05:47:34,311 INFO L112 eAbstractionObserver]: Analyzing ICFG MultCommutative-2.c [2023-12-16 05:47:34,327 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-16 05:47:34,327 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-16 05:47:34,378 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-16 05:47:34,385 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;@254c6d84, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-16 05:47:34,386 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-16 05:47:34,391 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-16 05:47:34,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-12-16 05:47:34,400 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 05:47:34,401 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 05:47:34,402 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 05:47:34,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 05:47:34,409 INFO L85 PathProgramCache]: Analyzing trace with hash 647179642, now seen corresponding path program 1 times [2023-12-16 05:47:34,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 05:47:34,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125398023] [2023-12-16 05:47:34,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 05:47:34,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 05:47:34,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:47:34,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-16 05:47:34,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:47:34,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-12-16 05:47:34,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:47:34,935 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-16 05:47:34,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 05:47:34,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125398023] [2023-12-16 05:47:34,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125398023] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-16 05:47:34,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-16 05:47:34,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-16 05:47:34,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947776004] [2023-12-16 05:47:34,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-16 05:47:34,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-16 05:47:34,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 05:47:34,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-16 05:47:34,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-16 05:47:34,981 INFO L87 Difference]: Start difference. First operand has 21 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-16 05:47:35,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 05:47:35,109 INFO L93 Difference]: Finished difference Result 37 states and 50 transitions. [2023-12-16 05:47:35,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-16 05:47:35,112 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2023-12-16 05:47:35,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 05:47:35,117 INFO L225 Difference]: With dead ends: 37 [2023-12-16 05:47:35,117 INFO L226 Difference]: Without dead ends: 27 [2023-12-16 05:47:35,120 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-12-16 05:47:35,123 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 7 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-16 05:47:35,124 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 122 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-16 05:47:35,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-12-16 05:47:35,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 23. [2023-12-16 05:47:35,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 16 states have internal predecessors, (17), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2023-12-16 05:47:35,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 31 transitions. [2023-12-16 05:47:35,161 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 31 transitions. Word has length 19 [2023-12-16 05:47:35,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 05:47:35,161 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 31 transitions. [2023-12-16 05:47:35,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-16 05:47:35,162 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 31 transitions. [2023-12-16 05:47:35,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-12-16 05:47:35,163 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 05:47:35,164 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 05:47:35,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-16 05:47:35,164 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 05:47:35,165 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 05:47:35,165 INFO L85 PathProgramCache]: Analyzing trace with hash 1580415186, now seen corresponding path program 1 times [2023-12-16 05:47:35,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 05:47:35,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890157125] [2023-12-16 05:47:35,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 05:47:35,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 05:47:35,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:47:35,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-16 05:47:35,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:47:35,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-12-16 05:47:35,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:47:35,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-16 05:47:35,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:47:35,424 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-16 05:47:35,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 05:47:35,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890157125] [2023-12-16 05:47:35,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890157125] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-16 05:47:35,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184008807] [2023-12-16 05:47:35,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 05:47:35,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 05:47:35,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 05:47:35,436 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 05:47:35,463 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-16 05:47:35,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:47:35,520 INFO L262 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-16 05:47:35,524 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 05:47:35,618 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-16 05:47:35,618 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 05:47:35,747 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-16 05:47:35,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184008807] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-16 05:47:35,750 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-16 05:47:35,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5, 5] total 13 [2023-12-16 05:47:35,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590477623] [2023-12-16 05:47:35,751 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-16 05:47:35,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-12-16 05:47:35,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 05:47:35,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-12-16 05:47:35,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2023-12-16 05:47:35,756 INFO L87 Difference]: Start difference. First operand 23 states and 31 transitions. Second operand has 13 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 4 states have call successors, (5), 1 states have call predecessors, (5), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2023-12-16 05:47:35,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 05:47:35,977 INFO L93 Difference]: Finished difference Result 51 states and 82 transitions. [2023-12-16 05:47:35,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-16 05:47:35,977 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 4 states have call successors, (5), 1 states have call predecessors, (5), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Word has length 25 [2023-12-16 05:47:35,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 05:47:35,979 INFO L225 Difference]: With dead ends: 51 [2023-12-16 05:47:35,979 INFO L226 Difference]: Without dead ends: 26 [2023-12-16 05:47:35,980 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2023-12-16 05:47:35,981 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 12 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-16 05:47:35,981 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 111 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-16 05:47:35,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-12-16 05:47:35,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2023-12-16 05:47:35,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 16 states have (on average 1.125) internal successors, (18), 17 states have internal predecessors, (18), 4 states have call successors, (4), 1 states have call predecessors, (4), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-12-16 05:47:35,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2023-12-16 05:47:35,993 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 30 transitions. Word has length 25 [2023-12-16 05:47:35,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 05:47:35,993 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 30 transitions. [2023-12-16 05:47:35,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 4 states have call successors, (5), 1 states have call predecessors, (5), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2023-12-16 05:47:35,994 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 30 transitions. [2023-12-16 05:47:35,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-12-16 05:47:35,995 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 05:47:35,995 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 05:47:36,004 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 05:47:36,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 05:47:36,203 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 05:47:36,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 05:47:36,204 INFO L85 PathProgramCache]: Analyzing trace with hash -590605896, now seen corresponding path program 1 times [2023-12-16 05:47:36,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 05:47:36,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936237797] [2023-12-16 05:47:36,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 05:47:36,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 05:47:36,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:47:36,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-16 05:47:36,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:47:36,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-16 05:47:36,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:47:36,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-12-16 05:47:36,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:47:36,307 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-16 05:47:36,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 05:47:36,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936237797] [2023-12-16 05:47:36,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936237797] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-16 05:47:36,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-16 05:47:36,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-16 05:47:36,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091772415] [2023-12-16 05:47:36,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-16 05:47:36,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-16 05:47:36,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 05:47:36,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-16 05:47:36,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-16 05:47:36,334 INFO L87 Difference]: Start difference. First operand 24 states and 30 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-16 05:47:36,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 05:47:36,371 INFO L93 Difference]: Finished difference Result 30 states and 36 transitions. [2023-12-16 05:47:36,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-16 05:47:36,372 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 26 [2023-12-16 05:47:36,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 05:47:36,373 INFO L225 Difference]: With dead ends: 30 [2023-12-16 05:47:36,373 INFO L226 Difference]: Without dead ends: 26 [2023-12-16 05:47:36,374 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 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 05:47:36,375 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 8 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-16 05:47:36,375 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 38 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-16 05:47:36,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-12-16 05:47:36,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2023-12-16 05:47:36,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 19 states have internal predecessors, (19), 4 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-12-16 05:47:36,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2023-12-16 05:47:36,381 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 26 [2023-12-16 05:47:36,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 05:47:36,381 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2023-12-16 05:47:36,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-16 05:47:36,381 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2023-12-16 05:47:36,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-12-16 05:47:36,382 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 05:47:36,383 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 05:47:36,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-16 05:47:36,383 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 05:47:36,383 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 05:47:36,383 INFO L85 PathProgramCache]: Analyzing trace with hash 132154764, now seen corresponding path program 2 times [2023-12-16 05:47:36,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 05:47:36,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754499627] [2023-12-16 05:47:36,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 05:47:36,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 05:47:36,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:47:36,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-16 05:47:36,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:47:36,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-16 05:47:36,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:47:36,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-12-16 05:47:36,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:47:36,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-16 05:47:36,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:47:36,994 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-16 05:47:36,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 05:47:36,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754499627] [2023-12-16 05:47:36,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754499627] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-16 05:47:36,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012224835] [2023-12-16 05:47:36,996 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-16 05:47:36,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 05:47:36,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 05:47:36,997 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 05:47:37,008 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 05:47:37,075 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-16 05:47:37,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-16 05:47:37,077 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 45 conjunts are in the unsatisfiable core [2023-12-16 05:47:37,080 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 05:47:37,537 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 12 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-16 05:47:37,537 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 05:47:38,470 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-16 05:47:38,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012224835] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-16 05:47:38,473 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-16 05:47:38,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 17] total 40 [2023-12-16 05:47:38,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297633660] [2023-12-16 05:47:38,473 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-16 05:47:38,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-12-16 05:47:38,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 05:47:38,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-12-16 05:47:38,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1408, Unknown=0, NotChecked=0, Total=1560 [2023-12-16 05:47:38,480 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 40 states, 37 states have (on average 1.5135135135135136) internal successors, (56), 28 states have internal predecessors, (56), 8 states have call successors, (8), 1 states have call predecessors, (8), 10 states have return successors, (12), 12 states have call predecessors, (12), 8 states have call successors, (12) [2023-12-16 05:47:38,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 05:47:38,920 INFO L93 Difference]: Finished difference Result 39 states and 48 transitions. [2023-12-16 05:47:38,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-16 05:47:38,920 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 37 states have (on average 1.5135135135135136) internal successors, (56), 28 states have internal predecessors, (56), 8 states have call successors, (8), 1 states have call predecessors, (8), 10 states have return successors, (12), 12 states have call predecessors, (12), 8 states have call successors, (12) Word has length 33 [2023-12-16 05:47:38,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 05:47:38,924 INFO L225 Difference]: With dead ends: 39 [2023-12-16 05:47:38,924 INFO L226 Difference]: Without dead ends: 35 [2023-12-16 05:47:38,925 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=264, Invalid=1992, Unknown=0, NotChecked=0, Total=2256 [2023-12-16 05:47:38,927 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 32 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 365 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-16 05:47:38,928 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 133 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 365 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-16 05:47:38,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-12-16 05:47:38,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 31. [2023-12-16 05:47:38,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 20 states have (on average 1.1) internal successors, (22), 22 states have internal predecessors, (22), 5 states have call successors, (5), 1 states have call predecessors, (5), 5 states have return successors, (14), 7 states have call predecessors, (14), 5 states have call successors, (14) [2023-12-16 05:47:38,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 41 transitions. [2023-12-16 05:47:38,944 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 41 transitions. Word has length 33 [2023-12-16 05:47:38,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 05:47:38,944 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 41 transitions. [2023-12-16 05:47:38,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 37 states have (on average 1.5135135135135136) internal successors, (56), 28 states have internal predecessors, (56), 8 states have call successors, (8), 1 states have call predecessors, (8), 10 states have return successors, (12), 12 states have call predecessors, (12), 8 states have call successors, (12) [2023-12-16 05:47:38,946 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 41 transitions. [2023-12-16 05:47:38,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-12-16 05:47:38,952 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 05:47:38,952 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 05:47:38,958 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 05:47:39,157 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 05:47:39,158 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 05:47:39,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 05:47:39,158 INFO L85 PathProgramCache]: Analyzing trace with hash 735115528, now seen corresponding path program 3 times [2023-12-16 05:47:39,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 05:47:39,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906199948] [2023-12-16 05:47:39,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 05:47:39,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 05:47:39,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:47:39,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-16 05:47:39,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:47:39,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-16 05:47:39,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:47:39,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-12-16 05:47:39,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:47:39,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-16 05:47:39,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:47:39,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-16 05:47:39,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:47:39,715 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 5 proven. 31 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-12-16 05:47:39,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 05:47:39,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906199948] [2023-12-16 05:47:39,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906199948] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-16 05:47:39,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277200816] [2023-12-16 05:47:39,720 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-16 05:47:39,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 05:47:39,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 05:47:39,725 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 05:47:39,749 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 05:47:39,780 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-12-16 05:47:39,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-16 05:47:39,782 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 57 conjunts are in the unsatisfiable core [2023-12-16 05:47:39,784 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 05:47:40,223 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 17 proven. 26 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-12-16 05:47:40,223 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 05:47:41,374 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 8 proven. 38 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-16 05:47:41,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277200816] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-16 05:47:41,375 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-16 05:47:41,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19, 20] total 47 [2023-12-16 05:47:41,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262688332] [2023-12-16 05:47:41,375 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-16 05:47:41,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-12-16 05:47:41,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 05:47:41,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-12-16 05:47:41,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1990, Unknown=0, NotChecked=0, Total=2162 [2023-12-16 05:47:41,381 INFO L87 Difference]: Start difference. First operand 31 states and 41 transitions. Second operand has 47 states, 44 states have (on average 1.4772727272727273) internal successors, (65), 32 states have internal predecessors, (65), 9 states have call successors, (9), 1 states have call predecessors, (9), 13 states have return successors, (15), 15 states have call predecessors, (15), 9 states have call successors, (15) [2023-12-16 05:47:42,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 05:47:42,497 INFO L93 Difference]: Finished difference Result 67 states and 89 transitions. [2023-12-16 05:47:42,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-12-16 05:47:42,497 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 44 states have (on average 1.4772727272727273) internal successors, (65), 32 states have internal predecessors, (65), 9 states have call successors, (9), 1 states have call predecessors, (9), 13 states have return successors, (15), 15 states have call predecessors, (15), 9 states have call successors, (15) Word has length 40 [2023-12-16 05:47:42,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 05:47:42,499 INFO L225 Difference]: With dead ends: 67 [2023-12-16 05:47:42,499 INFO L226 Difference]: Without dead ends: 61 [2023-12-16 05:47:42,501 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 902 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=485, Invalid=3937, Unknown=0, NotChecked=0, Total=4422 [2023-12-16 05:47:42,502 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 85 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 1011 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 1084 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 1011 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-16 05:47:42,502 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 272 Invalid, 1084 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 1011 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-16 05:47:42,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-12-16 05:47:42,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 46. [2023-12-16 05:47:42,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 32 states have internal predecessors, (34), 7 states have call successors, (7), 2 states have call predecessors, (7), 8 states have return successors, (29), 11 states have call predecessors, (29), 7 states have call successors, (29) [2023-12-16 05:47:42,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 70 transitions. [2023-12-16 05:47:42,511 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 70 transitions. Word has length 40 [2023-12-16 05:47:42,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 05:47:42,512 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 70 transitions. [2023-12-16 05:47:42,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 44 states have (on average 1.4772727272727273) internal successors, (65), 32 states have internal predecessors, (65), 9 states have call successors, (9), 1 states have call predecessors, (9), 13 states have return successors, (15), 15 states have call predecessors, (15), 9 states have call successors, (15) [2023-12-16 05:47:42,512 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 70 transitions. [2023-12-16 05:47:42,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-12-16 05:47:42,513 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 05:47:42,513 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 05:47:42,524 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-16 05:47:42,719 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 05:47:42,720 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 05:47:42,720 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 05:47:42,721 INFO L85 PathProgramCache]: Analyzing trace with hash 2110838554, now seen corresponding path program 4 times [2023-12-16 05:47:42,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 05:47:42,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844755293] [2023-12-16 05:47:42,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 05:47:42,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 05:47:42,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:47:42,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-16 05:47:42,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:47:43,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-16 05:47:43,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:47:43,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-16 05:47:43,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:47:43,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-12-16 05:47:43,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:47:43,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-16 05:47:43,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:47:43,264 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-12-16 05:47:43,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 05:47:43,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844755293] [2023-12-16 05:47:43,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844755293] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-16 05:47:43,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155195873] [2023-12-16 05:47:43,265 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-16 05:47:43,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 05:47:43,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 05:47:43,267 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 05:47:43,281 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 05:47:43,318 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-16 05:47:43,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-16 05:47:43,320 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 57 conjunts are in the unsatisfiable core [2023-12-16 05:47:43,322 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 05:47:43,864 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-12-16 05:47:43,864 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 05:47:45,126 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-16 05:47:45,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155195873] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-16 05:47:45,127 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-16 05:47:45,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19, 20] total 46 [2023-12-16 05:47:45,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47528656] [2023-12-16 05:47:45,127 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-16 05:47:45,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-12-16 05:47:45,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 05:47:45,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-12-16 05:47:45,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1895, Unknown=0, NotChecked=0, Total=2070 [2023-12-16 05:47:45,130 INFO L87 Difference]: Start difference. First operand 46 states and 70 transitions. Second operand has 46 states, 43 states have (on average 1.4883720930232558) internal successors, (64), 31 states have internal predecessors, (64), 9 states have call successors, (9), 1 states have call predecessors, (9), 12 states have return successors, (15), 15 states have call predecessors, (15), 9 states have call successors, (15) [2023-12-16 05:47:46,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 05:47:46,078 INFO L93 Difference]: Finished difference Result 80 states and 124 transitions. [2023-12-16 05:47:46,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-12-16 05:47:46,079 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 43 states have (on average 1.4883720930232558) internal successors, (64), 31 states have internal predecessors, (64), 9 states have call successors, (9), 1 states have call predecessors, (9), 12 states have return successors, (15), 15 states have call predecessors, (15), 9 states have call successors, (15) Word has length 40 [2023-12-16 05:47:46,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 05:47:46,082 INFO L225 Difference]: With dead ends: 80 [2023-12-16 05:47:46,083 INFO L226 Difference]: Without dead ends: 70 [2023-12-16 05:47:46,084 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 979 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=494, Invalid=3928, Unknown=0, NotChecked=0, Total=4422 [2023-12-16 05:47:46,085 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 88 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 888 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 967 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 888 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-16 05:47:46,085 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 285 Invalid, 967 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 888 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-16 05:47:46,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2023-12-16 05:47:46,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 55. [2023-12-16 05:47:46,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 38 states have internal predecessors, (41), 9 states have call successors, (9), 3 states have call predecessors, (9), 9 states have return successors, (44), 13 states have call predecessors, (44), 9 states have call successors, (44) [2023-12-16 05:47:46,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 94 transitions. [2023-12-16 05:47:46,095 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 94 transitions. Word has length 40 [2023-12-16 05:47:46,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 05:47:46,096 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 94 transitions. [2023-12-16 05:47:46,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 43 states have (on average 1.4883720930232558) internal successors, (64), 31 states have internal predecessors, (64), 9 states have call successors, (9), 1 states have call predecessors, (9), 12 states have return successors, (15), 15 states have call predecessors, (15), 9 states have call successors, (15) [2023-12-16 05:47:46,096 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 94 transitions. [2023-12-16 05:47:46,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-12-16 05:47:46,097 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 05:47:46,097 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 05:47:46,106 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-16 05:47:46,298 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 05:47:46,298 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 05:47:46,299 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 05:47:46,299 INFO L85 PathProgramCache]: Analyzing trace with hash -577127850, now seen corresponding path program 1 times [2023-12-16 05:47:46,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 05:47:46,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520424368] [2023-12-16 05:47:46,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 05:47:46,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 05:47:46,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:47:46,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-16 05:47:46,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:47:46,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-16 05:47:46,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:47:46,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-12-16 05:47:46,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:47:46,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-16 05:47:46,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:47:46,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-16 05:47:46,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:47:46,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-16 05:47:46,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:47:46,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-16 05:47:46,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:47:46,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-16 05:47:46,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:47:46,439 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 36 proven. 11 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2023-12-16 05:47:46,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 05:47:46,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520424368] [2023-12-16 05:47:46,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520424368] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-16 05:47:46,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46226791] [2023-12-16 05:47:46,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 05:47:46,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 05:47:46,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 05:47:46,441 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 05:47:46,445 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 05:47:46,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:47:46,496 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-16 05:47:46,498 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 05:47:46,532 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 35 proven. 17 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2023-12-16 05:47:46,532 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 05:47:46,685 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 35 proven. 18 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2023-12-16 05:47:46,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46226791] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-16 05:47:46,685 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-16 05:47:46,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 12 [2023-12-16 05:47:46,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311073897] [2023-12-16 05:47:46,686 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-16 05:47:46,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-16 05:47:46,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 05:47:46,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-16 05:47:46,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-12-16 05:47:46,688 INFO L87 Difference]: Start difference. First operand 55 states and 94 transitions. Second operand has 12 states, 10 states have (on average 3.4) internal successors, (34), 12 states have internal predecessors, (34), 6 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (9), 5 states have call predecessors, (9), 6 states have call successors, (9) [2023-12-16 05:47:46,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 05:47:46,766 INFO L93 Difference]: Finished difference Result 78 states and 127 transitions. [2023-12-16 05:47:46,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-16 05:47:46,767 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 3.4) internal successors, (34), 12 states have internal predecessors, (34), 6 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (9), 5 states have call predecessors, (9), 6 states have call successors, (9) Word has length 60 [2023-12-16 05:47:46,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 05:47:46,770 INFO L225 Difference]: With dead ends: 78 [2023-12-16 05:47:46,770 INFO L226 Difference]: Without dead ends: 43 [2023-12-16 05:47:46,773 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 129 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2023-12-16 05:47:46,774 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 14 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-16 05:47:46,775 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 81 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-16 05:47:46,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-12-16 05:47:46,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2023-12-16 05:47:46,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 29 states have (on average 1.103448275862069) internal successors, (32), 30 states have internal predecessors, (32), 7 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (19), 9 states have call predecessors, (19), 7 states have call successors, (19) [2023-12-16 05:47:46,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 58 transitions. [2023-12-16 05:47:46,789 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 58 transitions. Word has length 60 [2023-12-16 05:47:46,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 05:47:46,789 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 58 transitions. [2023-12-16 05:47:46,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 3.4) internal successors, (34), 12 states have internal predecessors, (34), 6 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (9), 5 states have call predecessors, (9), 6 states have call successors, (9) [2023-12-16 05:47:46,789 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 58 transitions. [2023-12-16 05:47:46,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-12-16 05:47:46,791 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 05:47:46,792 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 05:47:46,801 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-12-16 05:47:47,001 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 05:47:47,002 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 05:47:47,002 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 05:47:47,002 INFO L85 PathProgramCache]: Analyzing trace with hash 396340908, now seen corresponding path program 5 times [2023-12-16 05:47:47,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 05:47:47,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604517981] [2023-12-16 05:47:47,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 05:47:47,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 05:47:47,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:47:47,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-16 05:47:47,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:47:47,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-16 05:47:47,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:47:47,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-16 05:47:47,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:47:47,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-16 05:47:47,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:47:47,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-12-16 05:47:47,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:47:47,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-16 05:47:47,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:47:47,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-16 05:47:47,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:47:47,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-16 05:47:47,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:47:47,733 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 18 proven. 82 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-12-16 05:47:47,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 05:47:47,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604517981] [2023-12-16 05:47:47,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604517981] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-16 05:47:47,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059956049] [2023-12-16 05:47:47,734 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-16 05:47:47,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 05:47:47,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 05:47:47,735 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 05:47:47,754 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 05:47:47,800 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2023-12-16 05:47:47,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-16 05:47:47,803 WARN L260 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 97 conjunts are in the unsatisfiable core [2023-12-16 05:47:47,806 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 05:47:48,192 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 3 proven. 81 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2023-12-16 05:47:48,192 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 05:47:49,509 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 14 proven. 112 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-12-16 05:47:49,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059956049] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-16 05:47:49,509 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-16 05:47:49,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 21] total 42 [2023-12-16 05:47:49,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915835698] [2023-12-16 05:47:49,510 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-16 05:47:49,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-12-16 05:47:49,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 05:47:49,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-12-16 05:47:49,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1570, Unknown=0, NotChecked=0, Total=1722 [2023-12-16 05:47:49,521 INFO L87 Difference]: Start difference. First operand 43 states and 58 transitions. Second operand has 42 states, 38 states have (on average 1.4473684210526316) internal successors, (55), 27 states have internal predecessors, (55), 10 states have call successors, (10), 1 states have call predecessors, (10), 9 states have return successors, (16), 15 states have call predecessors, (16), 10 states have call successors, (16) [2023-12-16 05:47:50,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 05:47:50,197 INFO L93 Difference]: Finished difference Result 62 states and 82 transitions. [2023-12-16 05:47:50,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-12-16 05:47:50,197 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 38 states have (on average 1.4473684210526316) internal successors, (55), 27 states have internal predecessors, (55), 10 states have call successors, (10), 1 states have call predecessors, (10), 9 states have return successors, (16), 15 states have call predecessors, (16), 10 states have call successors, (16) Word has length 61 [2023-12-16 05:47:50,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 05:47:50,198 INFO L225 Difference]: With dead ends: 62 [2023-12-16 05:47:50,198 INFO L226 Difference]: Without dead ends: 50 [2023-12-16 05:47:50,199 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 760 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=366, Invalid=3174, Unknown=0, NotChecked=0, Total=3540 [2023-12-16 05:47:50,200 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 40 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 729 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 743 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 729 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-16 05:47:50,201 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 256 Invalid, 743 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 729 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-16 05:47:50,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-12-16 05:47:50,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 46. [2023-12-16 05:47:50,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 31 states have (on average 1.096774193548387) internal successors, (34), 32 states have internal predecessors, (34), 7 states have call successors, (7), 3 states have call predecessors, (7), 7 states have return successors, (19), 10 states have call predecessors, (19), 7 states have call successors, (19) [2023-12-16 05:47:50,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 60 transitions. [2023-12-16 05:47:50,207 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 60 transitions. Word has length 61 [2023-12-16 05:47:50,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 05:47:50,207 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 60 transitions. [2023-12-16 05:47:50,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 38 states have (on average 1.4473684210526316) internal successors, (55), 27 states have internal predecessors, (55), 10 states have call successors, (10), 1 states have call predecessors, (10), 9 states have return successors, (16), 15 states have call predecessors, (16), 10 states have call successors, (16) [2023-12-16 05:47:50,208 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 60 transitions. [2023-12-16 05:47:50,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-12-16 05:47:50,211 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 05:47:50,211 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 05:47:50,220 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 05:47:50,418 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 05:47:50,418 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 05:47:50,419 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 05:47:50,419 INFO L85 PathProgramCache]: Analyzing trace with hash 834620298, now seen corresponding path program 6 times [2023-12-16 05:47:50,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 05:47:50,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473759657] [2023-12-16 05:47:50,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 05:47:50,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 05:47:50,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:47:50,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-16 05:47:50,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:47:50,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-16 05:47:50,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:47:51,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-16 05:47:51,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:47:51,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-12-16 05:47:51,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:47:51,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-16 05:47:51,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:47:51,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-16 05:47:51,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:47:51,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-16 05:47:51,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:47:51,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-16 05:47:51,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:47:51,638 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 20 proven. 91 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2023-12-16 05:47:51,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 05:47:51,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473759657] [2023-12-16 05:47:51,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473759657] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-16 05:47:51,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122336041] [2023-12-16 05:47:51,639 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-16 05:47:51,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 05:47:51,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 05:47:51,640 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 05:47:51,662 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 05:47:51,707 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2023-12-16 05:47:51,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-16 05:47:51,710 WARN L260 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 97 conjunts are in the unsatisfiable core [2023-12-16 05:47:51,712 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 05:47:52,222 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 4 proven. 83 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2023-12-16 05:47:52,222 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 05:47:54,009 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 23 proven. 115 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-12-16 05:47:54,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122336041] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-16 05:47:54,009 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-16 05:47:54,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 18, 27] total 56 [2023-12-16 05:47:54,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279307696] [2023-12-16 05:47:54,010 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-16 05:47:54,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2023-12-16 05:47:54,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 05:47:54,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2023-12-16 05:47:54,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=2876, Unknown=0, NotChecked=0, Total=3080 [2023-12-16 05:47:54,012 INFO L87 Difference]: Start difference. First operand 46 states and 60 transitions. Second operand has 56 states, 52 states have (on average 1.4230769230769231) internal successors, (74), 35 states have internal predecessors, (74), 12 states have call successors, (12), 1 states have call predecessors, (12), 15 states have return successors, (22), 21 states have call predecessors, (22), 12 states have call successors, (22) [2023-12-16 05:47:55,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 05:47:55,115 INFO L93 Difference]: Finished difference Result 65 states and 82 transitions. [2023-12-16 05:47:55,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-12-16 05:47:55,115 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 52 states have (on average 1.4230769230769231) internal successors, (74), 35 states have internal predecessors, (74), 12 states have call successors, (12), 1 states have call predecessors, (12), 15 states have return successors, (22), 21 states have call predecessors, (22), 12 states have call successors, (22) Word has length 61 [2023-12-16 05:47:55,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 05:47:55,116 INFO L225 Difference]: With dead ends: 65 [2023-12-16 05:47:55,116 INFO L226 Difference]: Without dead ends: 58 [2023-12-16 05:47:55,118 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1199 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=540, Invalid=5312, Unknown=0, NotChecked=0, Total=5852 [2023-12-16 05:47:55,119 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 75 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 1060 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 1091 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1060 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-16 05:47:55,119 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 310 Invalid, 1091 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1060 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-16 05:47:55,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-12-16 05:47:55,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 49. [2023-12-16 05:47:55,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 34 states have internal predecessors, (36), 7 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (22), 11 states have call predecessors, (22), 7 states have call successors, (22) [2023-12-16 05:47:55,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 65 transitions. [2023-12-16 05:47:55,126 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 65 transitions. Word has length 61 [2023-12-16 05:47:55,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 05:47:55,126 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 65 transitions. [2023-12-16 05:47:55,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 52 states have (on average 1.4230769230769231) internal successors, (74), 35 states have internal predecessors, (74), 12 states have call successors, (12), 1 states have call predecessors, (12), 15 states have return successors, (22), 21 states have call predecessors, (22), 12 states have call successors, (22) [2023-12-16 05:47:55,127 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 65 transitions. [2023-12-16 05:47:55,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-12-16 05:47:55,127 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 05:47:55,127 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 05:47:55,135 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-12-16 05:47:55,333 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 05:47:55,333 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 05:47:55,334 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 05:47:55,334 INFO L85 PathProgramCache]: Analyzing trace with hash -1250404822, now seen corresponding path program 7 times [2023-12-16 05:47:55,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 05:47:55,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014954879] [2023-12-16 05:47:55,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 05:47:55,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 05:47:55,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:47:55,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-16 05:47:55,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:47:55,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-16 05:47:55,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:47:55,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-16 05:47:55,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:47:56,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-16 05:47:56,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:47:56,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-16 05:47:56,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:47:56,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-12-16 05:47:56,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:47:56,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-16 05:47:56,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:47:56,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-16 05:47:56,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:47:56,635 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 18 proven. 93 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2023-12-16 05:47:56,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 05:47:56,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014954879] [2023-12-16 05:47:56,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014954879] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-16 05:47:56,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784721598] [2023-12-16 05:47:56,636 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-16 05:47:56,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 05:47:56,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 05:47:56,649 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 05:47:56,724 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 05:47:56,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:47:56,800 WARN L260 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 97 conjunts are in the unsatisfiable core [2023-12-16 05:47:56,805 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 05:47:57,505 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 2 proven. 85 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2023-12-16 05:47:57,505 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 05:47:59,014 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 8 proven. 118 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-12-16 05:47:59,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784721598] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-16 05:47:59,014 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-16 05:47:59,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 18, 21] total 51 [2023-12-16 05:47:59,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947317417] [2023-12-16 05:47:59,015 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-16 05:47:59,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-12-16 05:47:59,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 05:47:59,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-12-16 05:47:59,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=2369, Unknown=0, NotChecked=0, Total=2550 [2023-12-16 05:47:59,017 INFO L87 Difference]: Start difference. First operand 49 states and 65 transitions. Second operand has 51 states, 47 states have (on average 1.3829787234042554) internal successors, (65), 32 states have internal predecessors, (65), 10 states have call successors, (10), 1 states have call predecessors, (10), 14 states have return successors, (20), 19 states have call predecessors, (20), 10 states have call successors, (20) [2023-12-16 05:48:00,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 05:48:00,258 INFO L93 Difference]: Finished difference Result 70 states and 93 transitions. [2023-12-16 05:48:00,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-12-16 05:48:00,259 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 47 states have (on average 1.3829787234042554) internal successors, (65), 32 states have internal predecessors, (65), 10 states have call successors, (10), 1 states have call predecessors, (10), 14 states have return successors, (20), 19 states have call predecessors, (20), 10 states have call successors, (20) Word has length 61 [2023-12-16 05:48:00,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 05:48:00,261 INFO L225 Difference]: With dead ends: 70 [2023-12-16 05:48:00,261 INFO L226 Difference]: Without dead ends: 60 [2023-12-16 05:48:00,263 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1059 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=556, Invalid=4846, Unknown=0, NotChecked=0, Total=5402 [2023-12-16 05:48:00,263 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 73 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 1113 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 1148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-16 05:48:00,263 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 255 Invalid, 1148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1113 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-16 05:48:00,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-12-16 05:48:00,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 49. [2023-12-16 05:48:00,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 34 states have internal predecessors, (36), 7 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (21), 11 states have call predecessors, (21), 7 states have call successors, (21) [2023-12-16 05:48:00,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 64 transitions. [2023-12-16 05:48:00,270 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 64 transitions. Word has length 61 [2023-12-16 05:48:00,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 05:48:00,271 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 64 transitions. [2023-12-16 05:48:00,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 47 states have (on average 1.3829787234042554) internal successors, (65), 32 states have internal predecessors, (65), 10 states have call successors, (10), 1 states have call predecessors, (10), 14 states have return successors, (20), 19 states have call predecessors, (20), 10 states have call successors, (20) [2023-12-16 05:48:00,271 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 64 transitions. [2023-12-16 05:48:00,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-12-16 05:48:00,277 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 05:48:00,277 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 7, 7, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 05:48:00,287 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 05:48:00,483 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 05:48:00,484 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 05:48:00,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 05:48:00,484 INFO L85 PathProgramCache]: Analyzing trace with hash 1515345786, now seen corresponding path program 8 times [2023-12-16 05:48:00,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 05:48:00,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886902963] [2023-12-16 05:48:00,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 05:48:00,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 05:48:00,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:48:00,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-16 05:48:00,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:48:00,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-16 05:48:00,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:48:00,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-16 05:48:00,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:48:00,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-12-16 05:48:00,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:48:01,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-16 05:48:01,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:48:01,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-16 05:48:01,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:48:01,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-16 05:48:01,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:48:01,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-16 05:48:01,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:48:01,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-16 05:48:01,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:48:01,506 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 24 proven. 117 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-12-16 05:48:01,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 05:48:01,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886902963] [2023-12-16 05:48:01,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886902963] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-16 05:48:01,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246422531] [2023-12-16 05:48:01,507 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-16 05:48:01,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 05:48:01,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 05:48:01,508 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 05:48:01,532 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 05:48:01,578 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-16 05:48:01,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-16 05:48:01,580 WARN L260 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 109 conjunts are in the unsatisfiable core [2023-12-16 05:48:01,585 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 05:48:02,204 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 5 proven. 108 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2023-12-16 05:48:02,205 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 05:48:03,990 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 26 proven. 156 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-12-16 05:48:03,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246422531] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-16 05:48:03,990 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-16 05:48:03,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 20, 30] total 62 [2023-12-16 05:48:03,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906090751] [2023-12-16 05:48:03,991 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-16 05:48:03,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2023-12-16 05:48:03,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 05:48:03,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2023-12-16 05:48:03,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=3556, Unknown=0, NotChecked=0, Total=3782 [2023-12-16 05:48:03,993 INFO L87 Difference]: Start difference. First operand 49 states and 64 transitions. Second operand has 62 states, 58 states have (on average 1.4137931034482758) internal successors, (82), 38 states have internal predecessors, (82), 13 states have call successors, (13), 1 states have call predecessors, (13), 17 states have return successors, (25), 24 states have call predecessors, (25), 13 states have call successors, (25) [2023-12-16 05:48:05,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 05:48:05,291 INFO L93 Difference]: Finished difference Result 70 states and 95 transitions. [2023-12-16 05:48:05,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-12-16 05:48:05,292 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 58 states have (on average 1.4137931034482758) internal successors, (82), 38 states have internal predecessors, (82), 13 states have call successors, (13), 1 states have call predecessors, (13), 17 states have return successors, (25), 24 states have call predecessors, (25), 13 states have call successors, (25) Word has length 68 [2023-12-16 05:48:05,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 05:48:05,294 INFO L225 Difference]: With dead ends: 70 [2023-12-16 05:48:05,294 INFO L226 Difference]: Without dead ends: 63 [2023-12-16 05:48:05,296 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1427 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=616, Invalid=6356, Unknown=0, NotChecked=0, Total=6972 [2023-12-16 05:48:05,297 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 76 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 1363 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 1398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-16 05:48:05,297 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 386 Invalid, 1398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1363 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-12-16 05:48:05,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2023-12-16 05:48:05,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 52. [2023-12-16 05:48:05,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 36 states have internal predecessors, (38), 7 states have call successors, (7), 3 states have call predecessors, (7), 9 states have return successors, (24), 12 states have call predecessors, (24), 7 states have call successors, (24) [2023-12-16 05:48:05,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 69 transitions. [2023-12-16 05:48:05,307 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 69 transitions. Word has length 68 [2023-12-16 05:48:05,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 05:48:05,309 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 69 transitions. [2023-12-16 05:48:05,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 58 states have (on average 1.4137931034482758) internal successors, (82), 38 states have internal predecessors, (82), 13 states have call successors, (13), 1 states have call predecessors, (13), 17 states have return successors, (25), 24 states have call predecessors, (25), 13 states have call successors, (25) [2023-12-16 05:48:05,309 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 69 transitions. [2023-12-16 05:48:05,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-12-16 05:48:05,311 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 05:48:05,311 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 8, 8, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 05:48:05,316 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 05:48:05,520 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 05:48:05,520 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 05:48:05,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 05:48:05,521 INFO L85 PathProgramCache]: Analyzing trace with hash -335813798, now seen corresponding path program 9 times [2023-12-16 05:48:05,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 05:48:05,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996577619] [2023-12-16 05:48:05,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 05:48:05,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 05:48:05,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:48:05,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-16 05:48:05,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:48:05,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-16 05:48:05,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:48:05,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-16 05:48:05,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:48:05,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-12-16 05:48:05,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:48:06,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-16 05:48:06,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:48:06,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-16 05:48:06,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:48:06,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-16 05:48:06,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:48:06,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-16 05:48:06,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:48:06,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-16 05:48:06,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:48:06,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-16 05:48:06,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:48:06,700 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 28 proven. 146 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2023-12-16 05:48:06,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 05:48:06,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996577619] [2023-12-16 05:48:06,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996577619] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-16 05:48:06,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243099942] [2023-12-16 05:48:06,701 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-16 05:48:06,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 05:48:06,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 05:48:06,702 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-16 05:48:06,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-16 05:48:06,788 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2023-12-16 05:48:06,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-16 05:48:06,791 WARN L260 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 120 conjunts are in the unsatisfiable core [2023-12-16 05:48:06,793 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 05:48:07,631 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 18 proven. 142 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2023-12-16 05:48:07,631 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 05:48:10,297 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 30 proven. 206 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-12-16 05:48:10,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243099942] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-16 05:48:10,297 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-16 05:48:10,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 26, 37] total 73 [2023-12-16 05:48:10,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61019363] [2023-12-16 05:48:10,298 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-16 05:48:10,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2023-12-16 05:48:10,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 05:48:10,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2023-12-16 05:48:10,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=4971, Unknown=0, NotChecked=0, Total=5256 [2023-12-16 05:48:10,304 INFO L87 Difference]: Start difference. First operand 52 states and 69 transitions. Second operand has 73 states, 68 states have (on average 1.4264705882352942) internal successors, (97), 46 states have internal predecessors, (97), 14 states have call successors, (14), 1 states have call predecessors, (14), 20 states have return successors, (29), 27 states have call predecessors, (29), 14 states have call successors, (29) [2023-12-16 05:48:11,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 05:48:11,842 INFO L93 Difference]: Finished difference Result 73 states and 100 transitions. [2023-12-16 05:48:11,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-12-16 05:48:11,842 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 68 states have (on average 1.4264705882352942) internal successors, (97), 46 states have internal predecessors, (97), 14 states have call successors, (14), 1 states have call predecessors, (14), 20 states have return successors, (29), 27 states have call predecessors, (29), 14 states have call successors, (29) Word has length 75 [2023-12-16 05:48:11,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 05:48:11,843 INFO L225 Difference]: With dead ends: 73 [2023-12-16 05:48:11,843 INFO L226 Difference]: Without dead ends: 66 [2023-12-16 05:48:11,846 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 124 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1976 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=810, Invalid=8502, Unknown=0, NotChecked=0, Total=9312 [2023-12-16 05:48:11,846 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 140 mSDsluCounter, 499 mSDsCounter, 0 mSdLazyCounter, 1801 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 518 SdHoareTripleChecker+Invalid, 1858 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1801 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-12-16 05:48:11,847 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 518 Invalid, 1858 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1801 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-12-16 05:48:11,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2023-12-16 05:48:11,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 55. [2023-12-16 05:48:11,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 37 states have (on average 1.0810810810810811) internal successors, (40), 38 states have internal predecessors, (40), 7 states have call successors, (7), 3 states have call predecessors, (7), 10 states have return successors, (27), 13 states have call predecessors, (27), 7 states have call successors, (27) [2023-12-16 05:48:11,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 74 transitions. [2023-12-16 05:48:11,854 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 74 transitions. Word has length 75 [2023-12-16 05:48:11,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 05:48:11,855 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 74 transitions. [2023-12-16 05:48:11,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 68 states have (on average 1.4264705882352942) internal successors, (97), 46 states have internal predecessors, (97), 14 states have call successors, (14), 1 states have call predecessors, (14), 20 states have return successors, (29), 27 states have call predecessors, (29), 14 states have call successors, (29) [2023-12-16 05:48:11,855 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 74 transitions. [2023-12-16 05:48:11,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-12-16 05:48:11,856 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 05:48:11,856 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 9, 9, 9, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 05:48:11,866 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-12-16 05:48:12,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-12-16 05:48:12,062 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 05:48:12,062 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 05:48:12,062 INFO L85 PathProgramCache]: Analyzing trace with hash -1392852054, now seen corresponding path program 10 times [2023-12-16 05:48:12,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 05:48:12,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081855989] [2023-12-16 05:48:12,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 05:48:12,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 05:48:12,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:48:12,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-16 05:48:12,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:48:12,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-16 05:48:12,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:48:12,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-16 05:48:12,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:48:12,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-12-16 05:48:12,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:48:12,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-16 05:48:12,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:48:12,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-16 05:48:12,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:48:12,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-16 05:48:12,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:48:13,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-16 05:48:13,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:48:13,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-16 05:48:13,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:48:13,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-16 05:48:13,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:48:13,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-16 05:48:13,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:48:13,376 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 32 proven. 178 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2023-12-16 05:48:13,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 05:48:13,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081855989] [2023-12-16 05:48:13,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081855989] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-16 05:48:13,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082034377] [2023-12-16 05:48:13,377 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-16 05:48:13,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 05:48:13,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 05:48:13,378 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-16 05:48:13,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-16 05:48:13,463 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-16 05:48:13,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-16 05:48:13,466 WARN L260 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 133 conjunts are in the unsatisfiable core [2023-12-16 05:48:13,468 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 05:48:14,378 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 7 proven. 167 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2023-12-16 05:48:14,378 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 05:48:16,919 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 32 proven. 256 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2023-12-16 05:48:16,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082034377] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-16 05:48:16,919 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-16 05:48:16,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 24, 36] total 74 [2023-12-16 05:48:16,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341821898] [2023-12-16 05:48:16,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-16 05:48:16,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2023-12-16 05:48:16,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 05:48:16,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2023-12-16 05:48:16,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=5132, Unknown=0, NotChecked=0, Total=5402 [2023-12-16 05:48:16,922 INFO L87 Difference]: Start difference. First operand 55 states and 74 transitions. Second operand has 74 states, 70 states have (on average 1.4) internal successors, (98), 44 states have internal predecessors, (98), 15 states have call successors, (15), 1 states have call predecessors, (15), 21 states have return successors, (31), 30 states have call predecessors, (31), 15 states have call successors, (31) [2023-12-16 05:48:18,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 05:48:18,643 INFO L93 Difference]: Finished difference Result 76 states and 105 transitions. [2023-12-16 05:48:18,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-12-16 05:48:18,643 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 70 states have (on average 1.4) internal successors, (98), 44 states have internal predecessors, (98), 15 states have call successors, (15), 1 states have call predecessors, (15), 21 states have return successors, (31), 30 states have call predecessors, (31), 15 states have call successors, (31) Word has length 82 [2023-12-16 05:48:18,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 05:48:18,646 INFO L225 Difference]: With dead ends: 76 [2023-12-16 05:48:18,646 INFO L226 Difference]: Without dead ends: 69 [2023-12-16 05:48:18,647 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2047 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=788, Invalid=9112, Unknown=0, NotChecked=0, Total=9900 [2023-12-16 05:48:18,655 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 111 mSDsluCounter, 521 mSDsCounter, 0 mSdLazyCounter, 1939 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 540 SdHoareTripleChecker+Invalid, 1980 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1939 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-12-16 05:48:18,664 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 540 Invalid, 1980 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1939 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-12-16 05:48:18,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2023-12-16 05:48:18,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 58. [2023-12-16 05:48:18,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 40 states have internal predecessors, (42), 7 states have call successors, (7), 3 states have call predecessors, (7), 11 states have return successors, (30), 14 states have call predecessors, (30), 7 states have call successors, (30) [2023-12-16 05:48:18,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 79 transitions. [2023-12-16 05:48:18,706 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 79 transitions. Word has length 82 [2023-12-16 05:48:18,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 05:48:18,706 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 79 transitions. [2023-12-16 05:48:18,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 70 states have (on average 1.4) internal successors, (98), 44 states have internal predecessors, (98), 15 states have call successors, (15), 1 states have call predecessors, (15), 21 states have return successors, (31), 30 states have call predecessors, (31), 15 states have call successors, (31) [2023-12-16 05:48:18,707 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 79 transitions. [2023-12-16 05:48:18,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-12-16 05:48:18,707 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 05:48:18,708 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 10, 10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 05:48:18,714 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-12-16 05:48:18,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-12-16 05:48:18,908 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 05:48:18,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 05:48:18,909 INFO L85 PathProgramCache]: Analyzing trace with hash 1149449002, now seen corresponding path program 11 times [2023-12-16 05:48:18,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 05:48:18,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634648609] [2023-12-16 05:48:18,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 05:48:18,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 05:48:18,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:48:19,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-16 05:48:19,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:48:19,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-16 05:48:19,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:48:19,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-16 05:48:19,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:48:19,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-12-16 05:48:19,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:48:20,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-16 05:48:20,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:48:20,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-16 05:48:20,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:48:20,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-16 05:48:20,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:48:20,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-16 05:48:20,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:48:21,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-16 05:48:21,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:48:21,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-16 05:48:21,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:48:21,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-16 05:48:21,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:48:21,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-16 05:48:21,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:48:21,571 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 36 proven. 213 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2023-12-16 05:48:21,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 05:48:21,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634648609] [2023-12-16 05:48:21,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634648609] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-16 05:48:21,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683969486] [2023-12-16 05:48:21,571 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-16 05:48:21,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 05:48:21,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 05:48:21,573 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-16 05:48:21,578 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-16 05:48:21,690 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2023-12-16 05:48:21,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-16 05:48:21,693 WARN L260 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 145 conjunts are in the unsatisfiable core [2023-12-16 05:48:21,695 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 05:48:22,638 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 17 proven. 193 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2023-12-16 05:48:22,639 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 05:48:25,651 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 36 proven. 315 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2023-12-16 05:48:25,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683969486] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-16 05:48:25,651 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-16 05:48:25,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 26, 39] total 80 [2023-12-16 05:48:25,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860654696] [2023-12-16 05:48:25,651 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-16 05:48:25,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2023-12-16 05:48:25,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 05:48:25,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2023-12-16 05:48:25,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=292, Invalid=6028, Unknown=0, NotChecked=0, Total=6320 [2023-12-16 05:48:25,654 INFO L87 Difference]: Start difference. First operand 58 states and 79 transitions. Second operand has 80 states, 76 states have (on average 1.4342105263157894) internal successors, (109), 47 states have internal predecessors, (109), 16 states have call successors, (16), 1 states have call predecessors, (16), 23 states have return successors, (34), 33 states have call predecessors, (34), 16 states have call successors, (34) [2023-12-16 05:48:27,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 05:48:27,393 INFO L93 Difference]: Finished difference Result 79 states and 110 transitions. [2023-12-16 05:48:27,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-12-16 05:48:27,393 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 76 states have (on average 1.4342105263157894) internal successors, (109), 47 states have internal predecessors, (109), 16 states have call successors, (16), 1 states have call predecessors, (16), 23 states have return successors, (34), 33 states have call predecessors, (34), 16 states have call successors, (34) Word has length 89 [2023-12-16 05:48:27,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 05:48:27,394 INFO L225 Difference]: With dead ends: 79 [2023-12-16 05:48:27,395 INFO L226 Difference]: Without dead ends: 72 [2023-12-16 05:48:27,396 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2392 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=880, Invalid=10676, Unknown=0, NotChecked=0, Total=11556 [2023-12-16 05:48:27,397 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 51 mSDsluCounter, 586 mSDsCounter, 0 mSdLazyCounter, 2163 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 607 SdHoareTripleChecker+Invalid, 2181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 2163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-12-16 05:48:27,397 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 607 Invalid, 2181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 2163 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-12-16 05:48:27,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2023-12-16 05:48:27,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 61. [2023-12-16 05:48:27,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 41 states have (on average 1.0731707317073171) internal successors, (44), 42 states have internal predecessors, (44), 7 states have call successors, (7), 3 states have call predecessors, (7), 12 states have return successors, (33), 15 states have call predecessors, (33), 7 states have call successors, (33) [2023-12-16 05:48:27,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 84 transitions. [2023-12-16 05:48:27,413 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 84 transitions. Word has length 89 [2023-12-16 05:48:27,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 05:48:27,413 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 84 transitions. [2023-12-16 05:48:27,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 76 states have (on average 1.4342105263157894) internal successors, (109), 47 states have internal predecessors, (109), 16 states have call successors, (16), 1 states have call predecessors, (16), 23 states have return successors, (34), 33 states have call predecessors, (34), 16 states have call successors, (34) [2023-12-16 05:48:27,414 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 84 transitions. [2023-12-16 05:48:27,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2023-12-16 05:48:27,415 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 05:48:27,415 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 14, 14, 14, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 05:48:27,433 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-12-16 05:48:27,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-12-16 05:48:27,619 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 05:48:27,620 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 05:48:27,620 INFO L85 PathProgramCache]: Analyzing trace with hash -663953108, now seen corresponding path program 12 times [2023-12-16 05:48:27,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 05:48:27,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235686149] [2023-12-16 05:48:27,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 05:48:27,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 05:48:27,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:48:28,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-16 05:48:28,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:48:28,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-16 05:48:28,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:48:28,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-16 05:48:28,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:48:28,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-16 05:48:28,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:48:28,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-16 05:48:28,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:48:28,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-16 05:48:28,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:48:28,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2023-12-16 05:48:28,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:48:29,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-16 05:48:29,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:48:29,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-16 05:48:29,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:48:29,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-16 05:48:29,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:48:29,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-16 05:48:29,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:48:29,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-16 05:48:29,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:48:29,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-16 05:48:29,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:48:30,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-16 05:48:30,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:48:30,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-16 05:48:30,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:48:30,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-16 05:48:30,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:48:30,294 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 52 proven. 383 refuted. 0 times theorem prover too weak. 347 trivial. 0 not checked. [2023-12-16 05:48:30,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 05:48:30,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235686149] [2023-12-16 05:48:30,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235686149] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-16 05:48:30,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276631268] [2023-12-16 05:48:30,294 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-16 05:48:30,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 05:48:30,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 05:48:30,297 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-16 05:48:30,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-16 05:48:30,411 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2023-12-16 05:48:30,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-16 05:48:30,414 WARN L260 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 193 conjunts are in the unsatisfiable core [2023-12-16 05:48:30,416 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 05:48:31,648 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 9 proven. 361 refuted. 0 times theorem prover too weak. 412 trivial. 0 not checked. [2023-12-16 05:48:31,648 INFO L327 TraceCheckSpWp]: Computing backward predicates... Received shutdown request... [2023-12-16 05:48:31,763 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-16 05:48:31,780 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-12-16 05:48:31,797 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-16 05:48:31,800 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-16 05:48:31,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-12-16 05:48:31,964 WARN L619 AbstractCegarLoop]: Verification canceled: while NwaCegarLoop was analyzing trace of length 118 with TraceHistMax 16,while TraceCheckSpWp was constructing backward predicates,while TransFormulaUtils was doing sequential composition of 6 TransFormulas,while SimplifyDDA2 was simplifying a ∧-7-1 term,while SimplifyDDA2 was simplifying 7 xjuncts wrt. a ATOM-1 context. [2023-12-16 05:48:31,969 INFO L445 BasicCegarLoop]: Path program histogram: [12, 1, 1, 1] [2023-12-16 05:48:31,971 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-12-16 05:48:31,994 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.12 05:48:31 BoogieIcfgContainer [2023-12-16 05:48:31,994 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-16 05:48:31,995 INFO L158 Benchmark]: Toolchain (without parser) took 58268.74ms. Allocated memory was 312.5MB in the beginning and 541.1MB in the end (delta: 228.6MB). Free memory was 259.8MB in the beginning and 235.5MB in the end (delta: 24.4MB). Peak memory consumption was 254.0MB. Max. memory is 8.0GB. [2023-12-16 05:48:31,995 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 192.9MB. Free memory is still 141.3MB. There was no memory consumed. Max. memory is 8.0GB. [2023-12-16 05:48:31,998 INFO L158 Benchmark]: CACSL2BoogieTranslator took 194.78ms. Allocated memory is still 312.5MB. Free memory was 259.3MB in the beginning and 248.7MB in the end (delta: 10.6MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2023-12-16 05:48:31,998 INFO L158 Benchmark]: Boogie Procedure Inliner took 30.32ms. Allocated memory is still 312.5MB. Free memory was 248.7MB in the beginning and 247.2MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-12-16 05:48:31,998 INFO L158 Benchmark]: Boogie Preprocessor took 34.90ms. Allocated memory is still 312.5MB. Free memory was 247.2MB in the beginning and 245.7MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-16 05:48:31,998 INFO L158 Benchmark]: RCFGBuilder took 313.33ms. Allocated memory is still 312.5MB. Free memory was 245.7MB in the beginning and 234.1MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-12-16 05:48:31,999 INFO L158 Benchmark]: TraceAbstraction took 57689.96ms. Allocated memory was 312.5MB in the beginning and 541.1MB in the end (delta: 228.6MB). Free memory was 233.6MB in the beginning and 235.5MB in the end (delta: -1.9MB). Peak memory consumption was 227.8MB. Max. memory is 8.0GB. [2023-12-16 05:48:32,000 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 192.9MB. Free memory is still 141.3MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 194.78ms. Allocated memory is still 312.5MB. Free memory was 259.3MB in the beginning and 248.7MB in the end (delta: 10.6MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 30.32ms. Allocated memory is still 312.5MB. Free memory was 248.7MB in the beginning and 247.2MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 34.90ms. Allocated memory is still 312.5MB. Free memory was 247.2MB in the beginning and 245.7MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 313.33ms. Allocated memory is still 312.5MB. Free memory was 245.7MB in the beginning and 234.1MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * TraceAbstraction took 57689.96ms. Allocated memory was 312.5MB in the beginning and 541.1MB in the end (delta: 228.6MB). Free memory was 233.6MB in the beginning and 235.5MB in the end (delta: -1.9MB). Peak memory consumption was 227.8MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 39]: Timeout (TraceAbstraction) Unable to prove that a call to reach_error is unreachable (line 39). Cancelled while NwaCegarLoop was analyzing trace of length 118 with TraceHistMax 16,while TraceCheckSpWp was constructing backward predicates,while TransFormulaUtils was doing sequential composition of 6 TransFormulas,while SimplifyDDA2 was simplifying a ∧-7-1 term,while SimplifyDDA2 was simplifying 7 xjuncts wrt. a ATOM-1 context. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 21 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 57.6s, OverallIterations: 15, TraceHistogramMax: 16, PathProgramHistogramMax: 12, EmptinessCheckTime: 0.0s, AutomataDifference: 12.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 897 SdHoareTripleChecker+Valid, 6.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 812 mSDsluCounter, 3914 SdHoareTripleChecker+Invalid, 5.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 3676 mSDsCounter, 421 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 12786 IncrementalHoareTripleChecker+Invalid, 13207 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 421 mSolverCounterUnsat, 238 mSDtfsCounter, 12786 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2043 GetRequests, 1237 SyntacticMatches, 4 SemanticMatches, 802 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13238 ImplicationChecksByTransitivity, 19.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=61occurred in iteration=14, InterpolantAutomatonStates: 321, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 14 MinimizatonAttempts, 108 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 36.6s InterpolantComputationTime, 1435 NumberOfCodeBlocks, 1435 NumberOfCodeBlocksAsserted, 75 NumberOfCheckSat, 2092 ConstructedInterpolants, 0 QuantifiedInterpolants, 14257 SizeOfPredicates, 162 NumberOfNonLiveVariables, 2195 ConjunctsInSsa, 967 ConjunctsInUnsatCore, 38 InterpolantComputations, 2 PerfectInterpolantSequences, 2901/6290 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown