/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 true -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/recursive-simple/id_i10_o10-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-19 23:56:23,738 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-19 23:56:23,811 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-12-19 23:56:23,814 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-19 23:56:23,815 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-19 23:56:23,838 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-19 23:56:23,839 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-19 23:56:23,840 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-19 23:56:23,840 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-19 23:56:23,844 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-19 23:56:23,844 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-19 23:56:23,844 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-19 23:56:23,845 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-19 23:56:23,846 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-19 23:56:23,846 INFO L153 SettingsManager]: * Use SBE=true [2023-12-19 23:56:23,846 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-19 23:56:23,847 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-19 23:56:23,847 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-19 23:56:23,847 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-19 23:56:23,847 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-19 23:56:23,848 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-19 23:56:23,848 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-19 23:56:23,848 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-19 23:56:23,848 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-19 23:56:23,848 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-19 23:56:23,849 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-19 23:56:23,849 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-19 23:56:23,849 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-19 23:56:23,849 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-19 23:56:23,849 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-19 23:56:23,850 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-19 23:56:23,850 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-19 23:56:23,850 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-19 23:56:23,851 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-19 23:56:23,851 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-19 23:56:23,851 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-19 23:56:23,851 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-19 23:56:23,851 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-19 23:56:23,851 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-19 23:56:23,851 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-19 23:56:23,851 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-19 23:56:23,852 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-19 23:56:23,852 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-19 23:56:23,852 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> true [2023-12-19 23:56:24,036 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-19 23:56:24,055 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-19 23:56:24,057 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-19 23:56:24,058 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-19 23:56:24,058 INFO L274 PluginConnector]: CDTParser initialized [2023-12-19 23:56:24,059 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_i10_o10-2.c [2023-12-19 23:56:25,160 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-19 23:56:25,304 INFO L384 CDTParser]: Found 1 translation units. [2023-12-19 23:56:25,305 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id_i10_o10-2.c [2023-12-19 23:56:25,310 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cd8c1e316/25ee7d2ce5384b9fa4bbd13a5d0fd9aa/FLAGbc4af86e5 [2023-12-19 23:56:25,320 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cd8c1e316/25ee7d2ce5384b9fa4bbd13a5d0fd9aa [2023-12-19 23:56:25,322 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-19 23:56:25,323 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-19 23:56:25,323 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-19 23:56:25,324 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-19 23:56:25,327 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-19 23:56:25,327 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.12 11:56:25" (1/1) ... [2023-12-19 23:56:25,328 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@753dc1f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 11:56:25, skipping insertion in model container [2023-12-19 23:56:25,328 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.12 11:56:25" (1/1) ... [2023-12-19 23:56:25,340 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-19 23:56:25,442 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id_i10_o10-2.c[454,467] [2023-12-19 23:56:25,450 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-19 23:56:25,460 INFO L202 MainTranslator]: Completed pre-run [2023-12-19 23:56:25,469 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id_i10_o10-2.c[454,467] [2023-12-19 23:56:25,469 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-19 23:56:25,479 INFO L206 MainTranslator]: Completed translation [2023-12-19 23:56:25,479 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 11:56:25 WrapperNode [2023-12-19 23:56:25,479 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-19 23:56:25,480 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-19 23:56:25,480 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-19 23:56:25,480 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-19 23:56:25,485 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 11:56:25" (1/1) ... [2023-12-19 23:56:25,489 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 11:56:25" (1/1) ... [2023-12-19 23:56:25,498 INFO L138 Inliner]: procedures = 13, calls = 9, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 18 [2023-12-19 23:56:25,499 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-19 23:56:25,499 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-19 23:56:25,499 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-19 23:56:25,499 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-19 23:56:25,506 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 11:56:25" (1/1) ... [2023-12-19 23:56:25,506 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 11:56:25" (1/1) ... [2023-12-19 23:56:25,506 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 11:56:25" (1/1) ... [2023-12-19 23:56:25,513 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]. [2023-12-19 23:56:25,513 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 11:56:25" (1/1) ... [2023-12-19 23:56:25,514 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 11:56:25" (1/1) ... [2023-12-19 23:56:25,515 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 11:56:25" (1/1) ... [2023-12-19 23:56:25,516 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 11:56:25" (1/1) ... [2023-12-19 23:56:25,516 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 11:56:25" (1/1) ... [2023-12-19 23:56:25,516 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 11:56:25" (1/1) ... [2023-12-19 23:56:25,517 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-19 23:56:25,518 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-19 23:56:25,518 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-19 23:56:25,518 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-19 23:56:25,518 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 11:56:25" (1/1) ... [2023-12-19 23:56:25,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-19 23:56:25,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 23:56:25,538 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) [2023-12-19 23:56:25,551 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 [2023-12-19 23:56:25,565 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-19 23:56:25,565 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-19 23:56:25,565 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-19 23:56:25,565 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-19 23:56:25,565 INFO L130 BoogieDeclarations]: Found specification of procedure id [2023-12-19 23:56:25,565 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2023-12-19 23:56:25,603 INFO L241 CfgBuilder]: Building ICFG [2023-12-19 23:56:25,605 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-19 23:56:25,686 INFO L282 CfgBuilder]: Performing block encoding [2023-12-19 23:56:25,705 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-19 23:56:25,706 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-12-19 23:56:25,706 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.12 11:56:25 BoogieIcfgContainer [2023-12-19 23:56:25,706 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-19 23:56:25,708 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-19 23:56:25,708 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-19 23:56:25,710 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-19 23:56:25,710 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.12 11:56:25" (1/3) ... [2023-12-19 23:56:25,710 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38aafb4c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.12 11:56:25, skipping insertion in model container [2023-12-19 23:56:25,711 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 11:56:25" (2/3) ... [2023-12-19 23:56:25,711 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38aafb4c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.12 11:56:25, skipping insertion in model container [2023-12-19 23:56:25,711 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.12 11:56:25" (3/3) ... [2023-12-19 23:56:25,712 INFO L112 eAbstractionObserver]: Analyzing ICFG id_i10_o10-2.c [2023-12-19 23:56:25,723 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-19 23:56:25,723 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-19 23:56:25,752 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-19 23:56:25,757 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;@3384748, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-19 23:56:25,757 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-19 23:56:25,760 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 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) [2023-12-19 23:56:25,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-12-19 23:56:25,764 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 23:56:25,765 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 23:56:25,765 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 23:56:25,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 23:56:25,769 INFO L85 PathProgramCache]: Analyzing trace with hash 1493244868, now seen corresponding path program 1 times [2023-12-19 23:56:25,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 23:56:25,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254518518] [2023-12-19 23:56:25,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 23:56:25,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 23:56:25,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:25,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-19 23:56:25,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:26,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 23:56:26,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 23:56:26,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254518518] [2023-12-19 23:56:26,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254518518] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 23:56:26,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 23:56:26,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-19 23:56:26,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706935517] [2023-12-19 23:56:26,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 23:56:26,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-19 23:56:26,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 23:56:26,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-19 23:56:26,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-19 23:56:26,094 INFO L87 Difference]: Start difference. First operand has 14 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 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) Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-19 23:56:26,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 23:56:26,163 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2023-12-19 23:56:26,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-19 23:56:26,166 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2023-12-19 23:56:26,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 23:56:26,170 INFO L225 Difference]: With dead ends: 22 [2023-12-19 23:56:26,171 INFO L226 Difference]: Without dead ends: 14 [2023-12-19 23:56:26,173 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-12-19 23:56:26,176 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 9 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-19 23:56:26,177 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 23 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 23:56:26,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2023-12-19 23:56:26,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2023-12-19 23:56:26,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 10 states have internal predecessors, (10), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-19 23:56:26,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2023-12-19 23:56:26,206 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 9 [2023-12-19 23:56:26,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 23:56:26,207 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2023-12-19 23:56:26,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-19 23:56:26,207 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2023-12-19 23:56:26,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-12-19 23:56:26,208 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 23:56:26,208 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 23:56:26,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-19 23:56:26,209 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 23:56:26,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 23:56:26,210 INFO L85 PathProgramCache]: Analyzing trace with hash -642736818, now seen corresponding path program 1 times [2023-12-19 23:56:26,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 23:56:26,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642543193] [2023-12-19 23:56:26,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 23:56:26,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 23:56:26,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:26,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-19 23:56:26,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:26,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:26,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:26,341 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-19 23:56:26,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 23:56:26,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642543193] [2023-12-19 23:56:26,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642543193] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 23:56:26,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064729991] [2023-12-19 23:56:26,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 23:56:26,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 23:56:26,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 23:56:26,345 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) [2023-12-19 23:56:26,358 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-19 23:56:26,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:26,391 INFO L262 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-19 23:56:26,395 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 23:56:26,459 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-19 23:56:26,459 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 23:56:26,582 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-19 23:56:26,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064729991] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 23:56:26,582 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 23:56:26,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 12 [2023-12-19 23:56:26,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104432522] [2023-12-19 23:56:26,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 23:56:26,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-19 23:56:26,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 23:56:26,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-19 23:56:26,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-12-19 23:56:26,585 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 12 states, 10 states have (on average 2.0) internal successors, (20), 11 states have internal predecessors, (20), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) [2023-12-19 23:56:26,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 23:56:26,619 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2023-12-19 23:56:26,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-19 23:56:26,620 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.0) internal successors, (20), 11 states have internal predecessors, (20), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) Word has length 15 [2023-12-19 23:56:26,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 23:56:26,621 INFO L225 Difference]: With dead ends: 21 [2023-12-19 23:56:26,621 INFO L226 Difference]: Without dead ends: 17 [2023-12-19 23:56:26,622 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2023-12-19 23:56:26,624 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 13 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-19 23:56:26,624 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 32 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 23:56:26,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-12-19 23:56:26,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2023-12-19 23:56:26,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 12 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-19 23:56:26,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2023-12-19 23:56:26,631 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 15 [2023-12-19 23:56:26,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 23:56:26,632 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2023-12-19 23:56:26,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.0) internal successors, (20), 11 states have internal predecessors, (20), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) [2023-12-19 23:56:26,632 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2023-12-19 23:56:26,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-12-19 23:56:26,633 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 23:56:26,633 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 23:56:26,658 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-12-19 23:56:26,838 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 [2023-12-19 23:56:26,839 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 23:56:26,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 23:56:26,840 INFO L85 PathProgramCache]: Analyzing trace with hash -2123675004, now seen corresponding path program 2 times [2023-12-19 23:56:26,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 23:56:26,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153132305] [2023-12-19 23:56:26,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 23:56:26,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 23:56:26,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:26,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-19 23:56:26,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:26,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:26,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:26,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:26,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:26,992 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-19 23:56:26,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 23:56:26,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153132305] [2023-12-19 23:56:26,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153132305] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 23:56:26,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066756944] [2023-12-19 23:56:26,993 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-19 23:56:26,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 23:56:26,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 23:56:27,010 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) [2023-12-19 23:56:27,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-19 23:56:27,045 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-19 23:56:27,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 23:56:27,046 INFO L262 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-19 23:56:27,047 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 23:56:27,093 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-19 23:56:27,093 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 23:56:27,376 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-19 23:56:27,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066756944] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 23:56:27,376 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 23:56:27,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 9] total 14 [2023-12-19 23:56:27,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806296343] [2023-12-19 23:56:27,377 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 23:56:27,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-19 23:56:27,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 23:56:27,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-19 23:56:27,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-12-19 23:56:27,379 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 14 states, 12 states have (on average 2.0) internal successors, (24), 13 states have internal predecessors, (24), 6 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (8), 3 states have call predecessors, (8), 6 states have call successors, (8) [2023-12-19 23:56:27,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 23:56:27,436 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2023-12-19 23:56:27,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-19 23:56:27,437 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.0) internal successors, (24), 13 states have internal predecessors, (24), 6 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (8), 3 states have call predecessors, (8), 6 states have call successors, (8) Word has length 21 [2023-12-19 23:56:27,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 23:56:27,437 INFO L225 Difference]: With dead ends: 24 [2023-12-19 23:56:27,437 INFO L226 Difference]: Without dead ends: 20 [2023-12-19 23:56:27,438 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2023-12-19 23:56:27,440 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 13 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-19 23:56:27,441 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 36 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 23:56:27,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-12-19 23:56:27,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2023-12-19 23:56:27,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 13 states have (on average 1.0769230769230769) internal successors, (14), 14 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-19 23:56:27,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2023-12-19 23:56:27,448 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 21 [2023-12-19 23:56:27,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 23:56:27,448 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2023-12-19 23:56:27,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.0) internal successors, (24), 13 states have internal predecessors, (24), 6 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (8), 3 states have call predecessors, (8), 6 states have call successors, (8) [2023-12-19 23:56:27,448 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2023-12-19 23:56:27,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-12-19 23:56:27,450 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 23:56:27,450 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 23:56:27,465 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-19 23:56:27,655 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,SelfDestructingSolverStorable2 [2023-12-19 23:56:27,656 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 23:56:27,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 23:56:27,656 INFO L85 PathProgramCache]: Analyzing trace with hash 54189198, now seen corresponding path program 3 times [2023-12-19 23:56:27,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 23:56:27,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723839725] [2023-12-19 23:56:27,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 23:56:27,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 23:56:27,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:27,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-19 23:56:27,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:27,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:27,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:27,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:27,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:27,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:27,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:27,863 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-19 23:56:27,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 23:56:27,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723839725] [2023-12-19 23:56:27,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723839725] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 23:56:27,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679106796] [2023-12-19 23:56:27,864 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-19 23:56:27,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 23:56:27,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 23:56:27,865 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) [2023-12-19 23:56:27,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-19 23:56:27,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-12-19 23:56:27,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 23:56:27,900 INFO L262 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-19 23:56:27,901 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 23:56:27,963 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-19 23:56:27,963 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 23:56:28,332 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-19 23:56:28,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1679106796] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 23:56:28,333 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 23:56:28,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 11] total 16 [2023-12-19 23:56:28,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468636595] [2023-12-19 23:56:28,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 23:56:28,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-12-19 23:56:28,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 23:56:28,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-12-19 23:56:28,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2023-12-19 23:56:28,335 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 16 states, 14 states have (on average 2.0) internal successors, (28), 15 states have internal predecessors, (28), 7 states have call successors, (7), 1 states have call predecessors, (7), 5 states have return successors, (11), 4 states have call predecessors, (11), 7 states have call successors, (11) [2023-12-19 23:56:28,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 23:56:28,380 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2023-12-19 23:56:28,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-19 23:56:28,381 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.0) internal successors, (28), 15 states have internal predecessors, (28), 7 states have call successors, (7), 1 states have call predecessors, (7), 5 states have return successors, (11), 4 states have call predecessors, (11), 7 states have call successors, (11) Word has length 27 [2023-12-19 23:56:28,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 23:56:28,381 INFO L225 Difference]: With dead ends: 27 [2023-12-19 23:56:28,381 INFO L226 Difference]: Without dead ends: 23 [2023-12-19 23:56:28,382 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 48 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2023-12-19 23:56:28,382 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 29 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-19 23:56:28,383 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 41 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 23:56:28,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-12-19 23:56:28,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2023-12-19 23:56:28,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 16 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (6), 5 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-19 23:56:28,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2023-12-19 23:56:28,386 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 27 [2023-12-19 23:56:28,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 23:56:28,386 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2023-12-19 23:56:28,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.0) internal successors, (28), 15 states have internal predecessors, (28), 7 states have call successors, (7), 1 states have call predecessors, (7), 5 states have return successors, (11), 4 states have call predecessors, (11), 7 states have call successors, (11) [2023-12-19 23:56:28,386 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2023-12-19 23:56:28,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-12-19 23:56:28,387 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 23:56:28,387 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 23:56:28,391 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-19 23:56:28,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 23:56:28,591 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 23:56:28,592 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 23:56:28,592 INFO L85 PathProgramCache]: Analyzing trace with hash -1269749436, now seen corresponding path program 4 times [2023-12-19 23:56:28,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 23:56:28,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897291661] [2023-12-19 23:56:28,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 23:56:28,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 23:56:28,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:28,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-19 23:56:28,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:28,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:28,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:28,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:28,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:28,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:28,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:28,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:28,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:28,804 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-19 23:56:28,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 23:56:28,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897291661] [2023-12-19 23:56:28,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897291661] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 23:56:28,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728317375] [2023-12-19 23:56:28,805 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-19 23:56:28,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 23:56:28,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 23:56:28,821 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) [2023-12-19 23:56:28,822 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-19 23:56:28,868 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-19 23:56:28,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 23:56:28,869 INFO L262 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-19 23:56:28,870 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 23:56:28,905 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-12-19 23:56:28,905 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 23:56:29,447 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-19 23:56:29,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728317375] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 23:56:29,448 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 23:56:29,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 13] total 18 [2023-12-19 23:56:29,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767493510] [2023-12-19 23:56:29,448 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 23:56:29,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-12-19 23:56:29,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 23:56:29,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-12-19 23:56:29,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2023-12-19 23:56:29,450 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand has 18 states, 16 states have (on average 2.0) internal successors, (32), 17 states have internal predecessors, (32), 8 states have call successors, (8), 1 states have call predecessors, (8), 6 states have return successors, (14), 5 states have call predecessors, (14), 8 states have call successors, (14) [2023-12-19 23:56:29,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 23:56:29,512 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2023-12-19 23:56:29,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-19 23:56:29,513 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.0) internal successors, (32), 17 states have internal predecessors, (32), 8 states have call successors, (8), 1 states have call predecessors, (8), 6 states have return successors, (14), 5 states have call predecessors, (14), 8 states have call successors, (14) Word has length 33 [2023-12-19 23:56:29,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 23:56:29,513 INFO L225 Difference]: With dead ends: 30 [2023-12-19 23:56:29,513 INFO L226 Difference]: Without dead ends: 26 [2023-12-19 23:56:29,514 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 60 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=163, Invalid=343, Unknown=0, NotChecked=0, Total=506 [2023-12-19 23:56:29,515 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 45 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-19 23:56:29,515 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 46 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 23:56:29,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-12-19 23:56:29,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2023-12-19 23:56:29,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 17 states have (on average 1.0588235294117647) internal successors, (18), 18 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 6 states have return successors, (7), 6 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-19 23:56:29,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2023-12-19 23:56:29,525 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 33 [2023-12-19 23:56:29,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 23:56:29,525 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2023-12-19 23:56:29,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.0) internal successors, (32), 17 states have internal predecessors, (32), 8 states have call successors, (8), 1 states have call predecessors, (8), 6 states have return successors, (14), 5 states have call predecessors, (14), 8 states have call successors, (14) [2023-12-19 23:56:29,526 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2023-12-19 23:56:29,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-12-19 23:56:29,527 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 23:56:29,527 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 23:56:29,534 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-19 23:56:29,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 23:56:29,735 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 23:56:29,736 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 23:56:29,736 INFO L85 PathProgramCache]: Analyzing trace with hash -4035634, now seen corresponding path program 5 times [2023-12-19 23:56:29,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 23:56:29,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621538198] [2023-12-19 23:56:29,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 23:56:29,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 23:56:29,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:29,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-19 23:56:29,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:29,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:29,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:29,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:29,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:29,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:29,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:29,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:29,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:29,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:29,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:29,937 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2023-12-19 23:56:29,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 23:56:29,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621538198] [2023-12-19 23:56:29,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621538198] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 23:56:29,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465927915] [2023-12-19 23:56:29,938 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-19 23:56:29,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 23:56:29,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 23:56:29,939 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) [2023-12-19 23:56:29,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-19 23:56:29,981 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-12-19 23:56:29,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 23:56:29,981 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-19 23:56:29,982 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 23:56:30,030 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-12-19 23:56:30,030 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 23:56:30,886 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-19 23:56:30,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465927915] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 23:56:30,887 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 23:56:30,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 15] total 20 [2023-12-19 23:56:30,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577562103] [2023-12-19 23:56:30,887 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 23:56:30,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-12-19 23:56:30,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 23:56:30,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-12-19 23:56:30,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2023-12-19 23:56:30,890 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand has 20 states, 18 states have (on average 2.0) internal successors, (36), 19 states have internal predecessors, (36), 9 states have call successors, (9), 1 states have call predecessors, (9), 7 states have return successors, (17), 6 states have call predecessors, (17), 9 states have call successors, (17) [2023-12-19 23:56:30,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 23:56:30,955 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2023-12-19 23:56:30,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-19 23:56:30,956 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 2.0) internal successors, (36), 19 states have internal predecessors, (36), 9 states have call successors, (9), 1 states have call predecessors, (9), 7 states have return successors, (17), 6 states have call predecessors, (17), 9 states have call successors, (17) Word has length 39 [2023-12-19 23:56:30,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 23:56:30,958 INFO L225 Difference]: With dead ends: 33 [2023-12-19 23:56:30,958 INFO L226 Difference]: Without dead ends: 29 [2023-12-19 23:56:30,958 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 72 SyntacticMatches, 6 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=440, Unknown=0, NotChecked=0, Total=650 [2023-12-19 23:56:30,961 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 35 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-19 23:56:30,961 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 49 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 23:56:30,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-12-19 23:56:30,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2023-12-19 23:56:30,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.0526315789473684) internal successors, (20), 20 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 7 states have return successors, (8), 7 states have call predecessors, (8), 2 states have call successors, (8) [2023-12-19 23:56:30,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2023-12-19 23:56:30,971 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 39 [2023-12-19 23:56:30,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 23:56:30,973 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2023-12-19 23:56:30,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 2.0) internal successors, (36), 19 states have internal predecessors, (36), 9 states have call successors, (9), 1 states have call predecessors, (9), 7 states have return successors, (17), 6 states have call predecessors, (17), 9 states have call successors, (17) [2023-12-19 23:56:30,973 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2023-12-19 23:56:30,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-12-19 23:56:30,974 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 23:56:30,975 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 23:56:30,984 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-12-19 23:56:31,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 23:56:31,176 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 23:56:31,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 23:56:31,177 INFO L85 PathProgramCache]: Analyzing trace with hash -1047611388, now seen corresponding path program 6 times [2023-12-19 23:56:31,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 23:56:31,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135204857] [2023-12-19 23:56:31,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 23:56:31,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 23:56:31,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:31,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-19 23:56:31,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:31,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:31,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:31,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:31,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:31,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:31,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:31,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:31,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:31,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:31,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:31,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:31,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:31,474 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-12-19 23:56:31,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 23:56:31,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135204857] [2023-12-19 23:56:31,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135204857] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 23:56:31,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038339419] [2023-12-19 23:56:31,474 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-19 23:56:31,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 23:56:31,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 23:56:31,492 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) [2023-12-19 23:56:31,498 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-19 23:56:31,554 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-12-19 23:56:31,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 23:56:31,555 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-19 23:56:31,556 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 23:56:31,607 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-12-19 23:56:31,608 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 23:56:32,744 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-19 23:56:32,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038339419] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 23:56:32,745 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 23:56:32,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 17] total 22 [2023-12-19 23:56:32,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207203792] [2023-12-19 23:56:32,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 23:56:32,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-12-19 23:56:32,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 23:56:32,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-12-19 23:56:32,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=333, Unknown=0, NotChecked=0, Total=462 [2023-12-19 23:56:32,746 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 22 states, 20 states have (on average 2.0) internal successors, (40), 21 states have internal predecessors, (40), 10 states have call successors, (10), 1 states have call predecessors, (10), 8 states have return successors, (20), 7 states have call predecessors, (20), 10 states have call successors, (20) [2023-12-19 23:56:32,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 23:56:32,814 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2023-12-19 23:56:32,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-19 23:56:32,815 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 2.0) internal successors, (40), 21 states have internal predecessors, (40), 10 states have call successors, (10), 1 states have call predecessors, (10), 8 states have return successors, (20), 7 states have call predecessors, (20), 10 states have call successors, (20) Word has length 45 [2023-12-19 23:56:32,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 23:56:32,816 INFO L225 Difference]: With dead ends: 36 [2023-12-19 23:56:32,816 INFO L226 Difference]: Without dead ends: 32 [2023-12-19 23:56:32,816 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 84 SyntacticMatches, 7 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=263, Invalid=549, Unknown=0, NotChecked=0, Total=812 [2023-12-19 23:56:32,817 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 53 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-19 23:56:32,817 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 54 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 23:56:32,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-12-19 23:56:32,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2023-12-19 23:56:32,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 21 states have (on average 1.0476190476190477) internal successors, (22), 22 states have internal predecessors, (22), 2 states have call successors, (2), 1 states have call predecessors, (2), 8 states have return successors, (9), 8 states have call predecessors, (9), 2 states have call successors, (9) [2023-12-19 23:56:32,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2023-12-19 23:56:32,819 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 45 [2023-12-19 23:56:32,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 23:56:32,820 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2023-12-19 23:56:32,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 2.0) internal successors, (40), 21 states have internal predecessors, (40), 10 states have call successors, (10), 1 states have call predecessors, (10), 8 states have return successors, (20), 7 states have call predecessors, (20), 10 states have call successors, (20) [2023-12-19 23:56:32,820 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2023-12-19 23:56:32,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-12-19 23:56:32,820 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 23:56:32,820 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 23:56:32,827 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-12-19 23:56:33,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 23:56:33,025 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 23:56:33,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 23:56:33,026 INFO L85 PathProgramCache]: Analyzing trace with hash 1466649358, now seen corresponding path program 7 times [2023-12-19 23:56:33,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 23:56:33,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001567813] [2023-12-19 23:56:33,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 23:56:33,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 23:56:33,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:33,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-19 23:56:33,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:33,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:33,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:33,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:33,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:33,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:33,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:33,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:33,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:33,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:33,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:33,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:33,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:33,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:33,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:33,274 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-12-19 23:56:33,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 23:56:33,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001567813] [2023-12-19 23:56:33,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001567813] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 23:56:33,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106156323] [2023-12-19 23:56:33,274 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-19 23:56:33,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 23:56:33,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 23:56:33,276 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) [2023-12-19 23:56:33,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-19 23:56:33,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:33,347 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 18 conjunts are in the unsatisfiable core [2023-12-19 23:56:33,349 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 23:56:33,403 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2023-12-19 23:56:33,403 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 23:56:35,074 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-12-19 23:56:35,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106156323] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 23:56:35,074 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 23:56:35,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 19] total 24 [2023-12-19 23:56:35,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203769890] [2023-12-19 23:56:35,074 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 23:56:35,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-12-19 23:56:35,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 23:56:35,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-12-19 23:56:35,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=399, Unknown=0, NotChecked=0, Total=552 [2023-12-19 23:56:35,076 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand has 24 states, 22 states have (on average 2.0) internal successors, (44), 23 states have internal predecessors, (44), 11 states have call successors, (11), 1 states have call predecessors, (11), 9 states have return successors, (23), 8 states have call predecessors, (23), 11 states have call successors, (23) [2023-12-19 23:56:35,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 23:56:35,153 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2023-12-19 23:56:35,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-19 23:56:35,154 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 2.0) internal successors, (44), 23 states have internal predecessors, (44), 11 states have call successors, (11), 1 states have call predecessors, (11), 9 states have return successors, (23), 8 states have call predecessors, (23), 11 states have call successors, (23) Word has length 51 [2023-12-19 23:56:35,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 23:56:35,155 INFO L225 Difference]: With dead ends: 39 [2023-12-19 23:56:35,155 INFO L226 Difference]: Without dead ends: 35 [2023-12-19 23:56:35,155 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 96 SyntacticMatches, 8 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=322, Invalid=670, Unknown=0, NotChecked=0, Total=992 [2023-12-19 23:56:35,156 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 70 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-19 23:56:35,156 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 52 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 23:56:35,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-12-19 23:56:35,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2023-12-19 23:56:35,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 24 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 9 states have return successors, (10), 9 states have call predecessors, (10), 2 states have call successors, (10) [2023-12-19 23:56:35,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2023-12-19 23:56:35,159 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 51 [2023-12-19 23:56:35,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 23:56:35,159 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2023-12-19 23:56:35,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 2.0) internal successors, (44), 23 states have internal predecessors, (44), 11 states have call successors, (11), 1 states have call predecessors, (11), 9 states have return successors, (23), 8 states have call predecessors, (23), 11 states have call successors, (23) [2023-12-19 23:56:35,159 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2023-12-19 23:56:35,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-12-19 23:56:35,160 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 23:56:35,160 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 23:56:35,178 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-12-19 23:56:35,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 23:56:35,367 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 23:56:35,368 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 23:56:35,368 INFO L85 PathProgramCache]: Analyzing trace with hash 335541956, now seen corresponding path program 8 times [2023-12-19 23:56:35,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 23:56:35,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597168698] [2023-12-19 23:56:35,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 23:56:35,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 23:56:35,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:35,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-19 23:56:35,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:35,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:35,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:35,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:35,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:35,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:35,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:35,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:35,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:35,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:35,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:35,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:35,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:35,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:35,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:35,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:35,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:35,666 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2023-12-19 23:56:35,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 23:56:35,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597168698] [2023-12-19 23:56:35,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597168698] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 23:56:35,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648357365] [2023-12-19 23:56:35,667 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-19 23:56:35,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 23:56:35,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 23:56:35,668 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) [2023-12-19 23:56:35,670 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-19 23:56:35,768 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-19 23:56:35,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 23:56:35,769 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 20 conjunts are in the unsatisfiable core [2023-12-19 23:56:35,770 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 23:56:35,822 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2023-12-19 23:56:35,822 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 23:56:37,955 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-12-19 23:56:37,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648357365] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 23:56:37,956 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 23:56:37,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 21] total 26 [2023-12-19 23:56:37,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264483721] [2023-12-19 23:56:37,958 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 23:56:37,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-12-19 23:56:37,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 23:56:37,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-12-19 23:56:37,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=471, Unknown=0, NotChecked=0, Total=650 [2023-12-19 23:56:37,962 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand has 26 states, 24 states have (on average 2.0) internal successors, (48), 25 states have internal predecessors, (48), 12 states have call successors, (12), 1 states have call predecessors, (12), 10 states have return successors, (26), 9 states have call predecessors, (26), 12 states have call successors, (26) [2023-12-19 23:56:38,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 23:56:38,063 INFO L93 Difference]: Finished difference Result 42 states and 43 transitions. [2023-12-19 23:56:38,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-19 23:56:38,063 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 2.0) internal successors, (48), 25 states have internal predecessors, (48), 12 states have call successors, (12), 1 states have call predecessors, (12), 10 states have return successors, (26), 9 states have call predecessors, (26), 12 states have call successors, (26) Word has length 57 [2023-12-19 23:56:38,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 23:56:38,065 INFO L225 Difference]: With dead ends: 42 [2023-12-19 23:56:38,066 INFO L226 Difference]: Without dead ends: 38 [2023-12-19 23:56:38,066 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 108 SyntacticMatches, 9 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=387, Invalid=803, Unknown=0, NotChecked=0, Total=1190 [2023-12-19 23:56:38,068 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 61 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-19 23:56:38,068 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 67 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-19 23:56:38,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-12-19 23:56:38,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2023-12-19 23:56:38,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 25 states have (on average 1.04) internal successors, (26), 26 states have internal predecessors, (26), 2 states have call successors, (2), 1 states have call predecessors, (2), 10 states have return successors, (11), 10 states have call predecessors, (11), 2 states have call successors, (11) [2023-12-19 23:56:38,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2023-12-19 23:56:38,077 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 57 [2023-12-19 23:56:38,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 23:56:38,077 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2023-12-19 23:56:38,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 2.0) internal successors, (48), 25 states have internal predecessors, (48), 12 states have call successors, (12), 1 states have call predecessors, (12), 10 states have return successors, (26), 9 states have call predecessors, (26), 12 states have call successors, (26) [2023-12-19 23:56:38,078 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2023-12-19 23:56:38,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-12-19 23:56:38,081 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 23:56:38,081 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 23:56:38,089 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-12-19 23:56:38,287 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,SelfDestructingSolverStorable8 [2023-12-19 23:56:38,287 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 23:56:38,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 23:56:38,288 INFO L85 PathProgramCache]: Analyzing trace with hash -682001842, now seen corresponding path program 9 times [2023-12-19 23:56:38,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 23:56:38,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495141895] [2023-12-19 23:56:38,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 23:56:38,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 23:56:38,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:38,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-19 23:56:38,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:38,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:38,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:38,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:38,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:38,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:38,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:38,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:38,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:38,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:38,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:38,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:38,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:38,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:38,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:38,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:38,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:38,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:38,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:38,620 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2023-12-19 23:56:38,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 23:56:38,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495141895] [2023-12-19 23:56:38,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495141895] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 23:56:38,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77450839] [2023-12-19 23:56:38,621 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-19 23:56:38,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 23:56:38,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 23:56:38,622 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) [2023-12-19 23:56:38,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-19 23:56:38,800 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2023-12-19 23:56:38,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 23:56:38,801 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 22 conjunts are in the unsatisfiable core [2023-12-19 23:56:38,802 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 23:56:38,861 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2023-12-19 23:56:38,861 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 23:56:41,941 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 207 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-12-19 23:56:41,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77450839] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 23:56:41,942 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 23:56:41,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 23] total 27 [2023-12-19 23:56:41,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314989938] [2023-12-19 23:56:41,942 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 23:56:41,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-12-19 23:56:41,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 23:56:41,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-12-19 23:56:41,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=498, Unknown=0, NotChecked=0, Total=702 [2023-12-19 23:56:41,943 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand has 27 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 26 states have internal predecessors, (51), 12 states have call successors, (12), 1 states have call predecessors, (12), 11 states have return successors, (28), 10 states have call predecessors, (28), 12 states have call successors, (28) [2023-12-19 23:56:42,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 23:56:42,027 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2023-12-19 23:56:42,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-19 23:56:42,035 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 26 states have internal predecessors, (51), 12 states have call successors, (12), 1 states have call predecessors, (12), 11 states have return successors, (28), 10 states have call predecessors, (28), 12 states have call successors, (28) Word has length 63 [2023-12-19 23:56:42,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 23:56:42,037 INFO L225 Difference]: With dead ends: 45 [2023-12-19 23:56:42,038 INFO L226 Difference]: Without dead ends: 41 [2023-12-19 23:56:42,038 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 120 SyntacticMatches, 11 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=455, Invalid=877, Unknown=0, NotChecked=0, Total=1332 [2023-12-19 23:56:42,039 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 127 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-19 23:56:42,039 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 65 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 23:56:42,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-12-19 23:56:42,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2023-12-19 23:56:42,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 27 states have (on average 1.037037037037037) internal successors, (28), 28 states have internal predecessors, (28), 2 states have call successors, (2), 1 states have call predecessors, (2), 11 states have return successors, (12), 11 states have call predecessors, (12), 2 states have call successors, (12) [2023-12-19 23:56:42,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2023-12-19 23:56:42,042 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 63 [2023-12-19 23:56:42,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 23:56:42,042 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2023-12-19 23:56:42,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 26 states have internal predecessors, (51), 12 states have call successors, (12), 1 states have call predecessors, (12), 11 states have return successors, (28), 10 states have call predecessors, (28), 12 states have call successors, (28) [2023-12-19 23:56:42,042 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2023-12-19 23:56:42,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-12-19 23:56:42,043 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 23:56:42,043 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 23:56:42,051 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-12-19 23:56:42,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-12-19 23:56:42,251 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 23:56:42,251 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 23:56:42,251 INFO L85 PathProgramCache]: Analyzing trace with hash 1904272772, now seen corresponding path program 10 times [2023-12-19 23:56:42,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 23:56:42,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161854874] [2023-12-19 23:56:42,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 23:56:42,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 23:56:42,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:42,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-19 23:56:42,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:42,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:42,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:42,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:42,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:42,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:42,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:42,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:42,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:42,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:42,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:42,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:42,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:42,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:42,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:42,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:42,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:42,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:42,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:42,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:42,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:42,806 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 10 proven. 155 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2023-12-19 23:56:42,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 23:56:42,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161854874] [2023-12-19 23:56:42,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161854874] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 23:56:42,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793149521] [2023-12-19 23:56:42,807 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-19 23:56:42,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 23:56:42,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 23:56:42,820 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) [2023-12-19 23:56:42,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-19 23:56:43,034 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-19 23:56:43,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 23:56:43,035 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 47 conjunts are in the unsatisfiable core [2023-12-19 23:56:43,037 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 23:56:43,095 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2023-12-19 23:56:43,095 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 23:56:43,437 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2023-12-19 23:56:43,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793149521] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 23:56:43,437 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 23:56:43,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 27 [2023-12-19 23:56:43,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880750409] [2023-12-19 23:56:43,437 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 23:56:43,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-12-19 23:56:43,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 23:56:43,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-12-19 23:56:43,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=650, Unknown=0, NotChecked=0, Total=702 [2023-12-19 23:56:43,439 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand has 27 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 16 states have internal predecessors, (31), 1 states have call successors, (2), 1 states have call predecessors, (2), 12 states have return successors, (12), 11 states have call predecessors, (12), 1 states have call successors, (12) [2023-12-19 23:56:43,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 23:56:43,880 INFO L93 Difference]: Finished difference Result 48 states and 49 transitions. [2023-12-19 23:56:43,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-12-19 23:56:43,880 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 16 states have internal predecessors, (31), 1 states have call successors, (2), 1 states have call predecessors, (2), 12 states have return successors, (12), 11 states have call predecessors, (12), 1 states have call successors, (12) Word has length 69 [2023-12-19 23:56:43,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 23:56:43,881 INFO L225 Difference]: With dead ends: 48 [2023-12-19 23:56:43,881 INFO L226 Difference]: Without dead ends: 44 [2023-12-19 23:56:43,882 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=137, Invalid=2119, Unknown=0, NotChecked=0, Total=2256 [2023-12-19 23:56:43,882 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 25 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 660 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 363 SdHoareTripleChecker+Invalid, 660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-19 23:56:43,882 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 363 Invalid, 660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 660 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-19 23:56:43,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-12-19 23:56:43,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2023-12-19 23:56:43,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 29 states have (on average 1.0344827586206897) internal successors, (30), 30 states have internal predecessors, (30), 2 states have call successors, (2), 1 states have call predecessors, (2), 12 states have return successors, (13), 12 states have call predecessors, (13), 2 states have call successors, (13) [2023-12-19 23:56:43,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2023-12-19 23:56:43,885 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 69 [2023-12-19 23:56:43,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 23:56:43,885 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2023-12-19 23:56:43,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 16 states have internal predecessors, (31), 1 states have call successors, (2), 1 states have call predecessors, (2), 12 states have return successors, (12), 11 states have call predecessors, (12), 1 states have call successors, (12) [2023-12-19 23:56:43,886 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2023-12-19 23:56:43,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-12-19 23:56:43,886 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 23:56:43,886 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 23:56:43,894 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-12-19 23:56:44,092 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,SelfDestructingSolverStorable10 [2023-12-19 23:56:44,092 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 23:56:44,092 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 23:56:44,093 INFO L85 PathProgramCache]: Analyzing trace with hash -776930930, now seen corresponding path program 11 times [2023-12-19 23:56:44,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 23:56:44,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838618232] [2023-12-19 23:56:44,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 23:56:44,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 23:56:44,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:44,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-19 23:56:44,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:44,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:44,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:44,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:44,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:44,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:44,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:44,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:44,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:44,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:44,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:44,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:44,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:44,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:44,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:44,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:44,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:44,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:44,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:44,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:44,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:44,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:44,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:44,585 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 165 proven. 33 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2023-12-19 23:56:44,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 23:56:44,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838618232] [2023-12-19 23:56:44,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838618232] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 23:56:44,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799407626] [2023-12-19 23:56:44,586 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-19 23:56:44,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 23:56:44,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 23:56:44,587 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) [2023-12-19 23:56:44,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-19 23:56:44,801 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2023-12-19 23:56:44,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 23:56:44,802 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 26 conjunts are in the unsatisfiable core [2023-12-19 23:56:44,806 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 23:56:44,885 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 187 proven. 0 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2023-12-19 23:56:44,885 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 23:56:44,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799407626] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 23:56:44,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-19 23:56:44,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [17] total 19 [2023-12-19 23:56:44,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736343666] [2023-12-19 23:56:44,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 23:56:44,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-12-19 23:56:44,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 23:56:44,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-12-19 23:56:44,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2023-12-19 23:56:44,887 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 2 states have call successors, (2), 1 states have call predecessors, (2), 12 states have return successors, (12), 12 states have call predecessors, (12), 2 states have call successors, (12) [2023-12-19 23:56:45,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 23:56:45,045 INFO L93 Difference]: Finished difference Result 44 states and 45 transitions. [2023-12-19 23:56:45,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-12-19 23:56:45,046 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 2 states have call successors, (2), 1 states have call predecessors, (2), 12 states have return successors, (12), 12 states have call predecessors, (12), 2 states have call successors, (12) Word has length 75 [2023-12-19 23:56:45,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 23:56:45,047 INFO L225 Difference]: With dead ends: 44 [2023-12-19 23:56:45,047 INFO L226 Difference]: Without dead ends: 0 [2023-12-19 23:56:45,047 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=285, Invalid=645, Unknown=0, NotChecked=0, Total=930 [2023-12-19 23:56:45,048 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 3 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-19 23:56:45,048 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 102 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 23:56:45,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-12-19 23:56:45,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-12-19 23:56:45,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 23:56:45,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-12-19 23:56:45,049 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 75 [2023-12-19 23:56:45,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 23:56:45,049 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-12-19 23:56:45,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 2 states have call successors, (2), 1 states have call predecessors, (2), 12 states have return successors, (12), 12 states have call predecessors, (12), 2 states have call successors, (12) [2023-12-19 23:56:45,049 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-12-19 23:56:45,049 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-12-19 23:56:45,051 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-19 23:56:45,060 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-12-19 23:56:45,258 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,SelfDestructingSolverStorable11 [2023-12-19 23:56:45,260 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2023-12-19 23:56:45,269 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2023-12-19 23:56:45,269 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 15) no Hoare annotation was computed. [2023-12-19 23:56:45,269 INFO L899 garLoopResultBuilder]: For program point L15(line 15) no Hoare annotation was computed. [2023-12-19 23:56:45,269 INFO L899 garLoopResultBuilder]: For program point L14(lines 14 16) no Hoare annotation was computed. [2023-12-19 23:56:45,270 INFO L895 garLoopResultBuilder]: At program point L13(line 13) the Hoare annotation is: (= |ULTIMATE.start_main_~input~0#1| 10) [2023-12-19 23:56:45,270 INFO L899 garLoopResultBuilder]: For program point L13-1(line 13) no Hoare annotation was computed. [2023-12-19 23:56:45,270 INFO L899 garLoopResultBuilder]: For program point L11(lines 11 17) no Hoare annotation was computed. [2023-12-19 23:56:45,270 INFO L899 garLoopResultBuilder]: For program point $Ultimate##0(line -1) no Hoare annotation was computed. [2023-12-19 23:56:45,270 INFO L899 garLoopResultBuilder]: For program point idFINAL(lines 6 9) no Hoare annotation was computed. [2023-12-19 23:56:45,270 INFO L899 garLoopResultBuilder]: For program point idEXIT(lines 6 9) no Hoare annotation was computed. [2023-12-19 23:56:45,270 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 6 9) the Hoare annotation is: true [2023-12-19 23:56:45,270 INFO L895 garLoopResultBuilder]: At program point L8(line 8) the Hoare annotation is: (= |id_#in~x| id_~x) [2023-12-19 23:56:45,270 INFO L899 garLoopResultBuilder]: For program point L7(line 7) no Hoare annotation was computed. [2023-12-19 23:56:45,270 INFO L899 garLoopResultBuilder]: For program point L8-1(line 8) no Hoare annotation was computed. [2023-12-19 23:56:45,272 INFO L445 BasicCegarLoop]: Path program histogram: [11, 1] [2023-12-19 23:56:45,273 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-12-19 23:56:45,276 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.12 11:56:45 BoogieIcfgContainer [2023-12-19 23:56:45,276 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-19 23:56:45,276 INFO L158 Benchmark]: Toolchain (without parser) took 19953.37ms. Allocated memory was 395.3MB in the beginning and 570.4MB in the end (delta: 175.1MB). Free memory was 342.9MB in the beginning and 449.6MB in the end (delta: -106.7MB). Peak memory consumption was 69.9MB. Max. memory is 8.0GB. [2023-12-19 23:56:45,276 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 244.3MB. Free memory is still 193.9MB. There was no memory consumed. Max. memory is 8.0GB. [2023-12-19 23:56:45,276 INFO L158 Benchmark]: CACSL2BoogieTranslator took 156.16ms. Allocated memory is still 395.3MB. Free memory was 342.7MB in the beginning and 332.4MB in the end (delta: 10.2MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2023-12-19 23:56:45,276 INFO L158 Benchmark]: Boogie Procedure Inliner took 18.46ms. Allocated memory is still 395.3MB. Free memory was 332.4MB in the beginning and 330.9MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-12-19 23:56:45,277 INFO L158 Benchmark]: Boogie Preprocessor took 18.09ms. Allocated memory is still 395.3MB. Free memory was 330.9MB in the beginning and 329.5MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-19 23:56:45,277 INFO L158 Benchmark]: RCFGBuilder took 188.48ms. Allocated memory is still 395.3MB. Free memory was 329.5MB in the beginning and 320.1MB in the end (delta: 9.4MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2023-12-19 23:56:45,277 INFO L158 Benchmark]: TraceAbstraction took 19567.88ms. Allocated memory was 395.3MB in the beginning and 570.4MB in the end (delta: 175.1MB). Free memory was 319.6MB in the beginning and 449.6MB in the end (delta: -130.0MB). Peak memory consumption was 46.9MB. Max. memory is 8.0GB. [2023-12-19 23:56:45,278 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 244.3MB. Free memory is still 193.9MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 156.16ms. Allocated memory is still 395.3MB. Free memory was 342.7MB in the beginning and 332.4MB in the end (delta: 10.2MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 18.46ms. Allocated memory is still 395.3MB. Free memory was 332.4MB in the beginning and 330.9MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 18.09ms. Allocated memory is still 395.3MB. Free memory was 330.9MB in the beginning and 329.5MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 188.48ms. Allocated memory is still 395.3MB. Free memory was 329.5MB in the beginning and 320.1MB in the end (delta: 9.4MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * TraceAbstraction took 19567.88ms. Allocated memory was 395.3MB in the beginning and 570.4MB in the end (delta: 175.1MB). Free memory was 319.6MB in the beginning and 449.6MB in the end (delta: -130.0MB). Peak memory consumption was 46.9MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 15]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 14 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 19.5s, OverallIterations: 12, TraceHistogramMax: 12, PathProgramHistogramMax: 11, EmptinessCheckTime: 0.0s, AutomataDifference: 1.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 571 SdHoareTripleChecker+Valid, 0.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 483 mSDsluCounter, 930 SdHoareTripleChecker+Invalid, 0.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 807 mSDsCounter, 168 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1226 IncrementalHoareTripleChecker+Invalid, 1394 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 168 mSolverCounterUnsat, 123 mSDtfsCounter, 1226 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1252 GetRequests, 903 SyntacticMatches, 55 SemanticMatches, 294 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2276 ImplicationChecksByTransitivity, 1.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=44occurred in iteration=11, InterpolantAutomatonStates: 137, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 12 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 5 PreInvPairs, 5 NumberOfFragments, 7 HoareAnnotationTreeSize, 5 FormulaSimplifications, 12 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FormulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 14.4s InterpolantComputationTime, 999 NumberOfCodeBlocks, 999 NumberOfCodeBlocksAsserted, 61 NumberOfCheckSat, 1386 ConstructedInterpolants, 0 QuantifiedInterpolants, 3846 SizeOfPredicates, 66 NumberOfNonLiveVariables, 1386 ConjunctsInSsa, 199 ConjunctsInUnsatCore, 33 InterpolantComputations, 2 PerfectInterpolantSequences, 2200/4378 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-12-19 23:56:45,293 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request...