/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.use.bitabs.translation false -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/recursive-simple/fibo_5-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-21 10:28:48,922 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-21 10:28:48,993 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-12-21 10:28:48,997 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-21 10:28:48,998 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-21 10:28:49,019 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-21 10:28:49,019 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-21 10:28:49,019 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-21 10:28:49,020 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-21 10:28:49,023 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-21 10:28:49,023 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-21 10:28:49,023 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-21 10:28:49,024 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-21 10:28:49,025 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-21 10:28:49,025 INFO L153 SettingsManager]: * Use SBE=true [2023-12-21 10:28:49,025 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-21 10:28:49,025 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-21 10:28:49,026 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-21 10:28:49,026 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-21 10:28:49,026 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-21 10:28:49,026 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-21 10:28:49,026 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-21 10:28:49,026 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-21 10:28:49,027 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-21 10:28:49,027 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-21 10:28:49,027 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-21 10:28:49,027 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-21 10:28:49,027 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-21 10:28:49,028 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-21 10:28:49,028 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-21 10:28:49,028 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-21 10:28:49,028 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-21 10:28:49,029 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-21 10:28:49,029 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-21 10:28:49,029 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-21 10:28:49,029 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-21 10:28:49,029 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-21 10:28:49,029 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-21 10:28:49,029 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-21 10:28:49,029 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-21 10:28:49,029 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-21 10:28:49,030 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-21 10:28:49,030 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-21 10:28:49,030 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> false [2023-12-21 10:28:49,217 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-21 10:28:49,229 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-21 10:28:49,231 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-21 10:28:49,231 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-21 10:28:49,232 INFO L274 PluginConnector]: CDTParser initialized [2023-12-21 10:28:49,232 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_5-1.c [2023-12-21 10:28:50,255 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-21 10:28:50,385 INFO L384 CDTParser]: Found 1 translation units. [2023-12-21 10:28:50,386 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_5-1.c [2023-12-21 10:28:50,395 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bdd1773f7/643977b4d2944edab0f1896e9f829b37/FLAG5b5c14021 [2023-12-21 10:28:50,405 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bdd1773f7/643977b4d2944edab0f1896e9f829b37 [2023-12-21 10:28:50,407 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-21 10:28:50,408 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-21 10:28:50,409 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-21 10:28:50,409 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-21 10:28:50,418 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-21 10:28:50,419 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:28:50" (1/1) ... [2023-12-21 10:28:50,420 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70f463b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:28:50, skipping insertion in model container [2023-12-21 10:28:50,420 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:28:50" (1/1) ... [2023-12-21 10:28:50,434 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-21 10:28:50,541 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_5-1.c[740,753] [2023-12-21 10:28:50,544 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-21 10:28:50,557 INFO L202 MainTranslator]: Completed pre-run [2023-12-21 10:28:50,568 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_5-1.c[740,753] [2023-12-21 10:28:50,569 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-21 10:28:50,578 INFO L206 MainTranslator]: Completed translation [2023-12-21 10:28:50,579 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:28:50 WrapperNode [2023-12-21 10:28:50,579 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-21 10:28:50,580 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-21 10:28:50,580 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-21 10:28:50,580 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-21 10:28:50,585 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:28:50" (1/1) ... [2023-12-21 10:28:50,588 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:28:50" (1/1) ... [2023-12-21 10:28:50,604 INFO L138 Inliner]: procedures = 13, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 20 [2023-12-21 10:28:50,604 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-21 10:28:50,605 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-21 10:28:50,605 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-21 10:28:50,605 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-21 10:28:50,611 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:28:50" (1/1) ... [2023-12-21 10:28:50,611 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:28:50" (1/1) ... [2023-12-21 10:28:50,612 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:28:50" (1/1) ... [2023-12-21 10:28:50,618 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]. [2023-12-21 10:28:50,618 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:28:50" (1/1) ... [2023-12-21 10:28:50,619 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:28:50" (1/1) ... [2023-12-21 10:28:50,620 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:28:50" (1/1) ... [2023-12-21 10:28:50,621 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:28:50" (1/1) ... [2023-12-21 10:28:50,621 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:28:50" (1/1) ... [2023-12-21 10:28:50,622 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:28:50" (1/1) ... [2023-12-21 10:28:50,623 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-21 10:28:50,623 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-21 10:28:50,623 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-21 10:28:50,623 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-21 10:28:50,624 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:28:50" (1/1) ... [2023-12-21 10:28:50,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-21 10:28:50,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 10:28:50,646 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) [2023-12-21 10:28:50,666 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-21 10:28:50,666 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-21 10:28:50,666 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-21 10:28:50,666 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-21 10:28:50,666 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2023-12-21 10:28:50,666 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2023-12-21 10:28:50,663 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 [2023-12-21 10:28:50,704 INFO L241 CfgBuilder]: Building ICFG [2023-12-21 10:28:50,706 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-21 10:28:50,828 INFO L282 CfgBuilder]: Performing block encoding [2023-12-21 10:28:50,843 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-21 10:28:50,843 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-12-21 10:28:50,843 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:28:50 BoogieIcfgContainer [2023-12-21 10:28:50,843 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-21 10:28:50,845 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-21 10:28:50,845 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-21 10:28:50,847 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-21 10:28:50,847 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 10:28:50" (1/3) ... [2023-12-21 10:28:50,848 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d35eb8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:28:50, skipping insertion in model container [2023-12-21 10:28:50,848 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:28:50" (2/3) ... [2023-12-21 10:28:50,848 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d35eb8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:28:50, skipping insertion in model container [2023-12-21 10:28:50,848 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:28:50" (3/3) ... [2023-12-21 10:28:50,849 INFO L112 eAbstractionObserver]: Analyzing ICFG fibo_5-1.c [2023-12-21 10:28:50,860 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-21 10:28:50,860 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-21 10:28:50,889 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-21 10:28:50,895 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;@69dad373, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-21 10:28:50,895 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-21 10:28:50,899 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 12 states have internal predecessors, (15), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-21 10:28:50,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-12-21 10:28:50,904 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 10:28:50,905 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 10:28:50,905 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 10:28:50,911 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 10:28:50,911 INFO L85 PathProgramCache]: Analyzing trace with hash -798924922, now seen corresponding path program 1 times [2023-12-21 10:28:50,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 10:28:50,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223020012] [2023-12-21 10:28:50,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:28:50,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 10:28:50,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:51,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-21 10:28:51,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:51,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 10:28:51,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 10:28:51,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223020012] [2023-12-21 10:28:51,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223020012] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 10:28:51,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 10:28:51,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-21 10:28:51,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737893195] [2023-12-21 10:28:51,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 10:28:51,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-21 10:28:51,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 10:28:51,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-21 10:28:51,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-21 10:28:51,108 INFO L87 Difference]: Start difference. First operand has 17 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 12 states have internal predecessors, (15), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 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) [2023-12-21 10:28:51,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 10:28:51,177 INFO L93 Difference]: Finished difference Result 25 states and 31 transitions. [2023-12-21 10:28:51,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-21 10:28:51,179 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 [2023-12-21 10:28:51,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 10:28:51,184 INFO L225 Difference]: With dead ends: 25 [2023-12-21 10:28:51,184 INFO L226 Difference]: Without dead ends: 17 [2023-12-21 10:28:51,186 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 [2023-12-21 10:28:51,188 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 12 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 10:28:51,189 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 27 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 10:28:51,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-12-21 10:28:51,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2023-12-21 10:28:51,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 12 states have internal predecessors, (13), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-12-21 10:28:51,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2023-12-21 10:28:51,222 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 9 [2023-12-21 10:28:51,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 10:28:51,222 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2023-12-21 10:28:51,222 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) [2023-12-21 10:28:51,222 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2023-12-21 10:28:51,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-12-21 10:28:51,223 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 10:28:51,223 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 10:28:51,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-21 10:28:51,224 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 10:28:51,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 10:28:51,224 INFO L85 PathProgramCache]: Analyzing trace with hash 1717873930, now seen corresponding path program 1 times [2023-12-21 10:28:51,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 10:28:51,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935771304] [2023-12-21 10:28:51,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:28:51,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 10:28:51,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:51,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-21 10:28:51,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:51,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 10:28:51,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 10:28:51,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935771304] [2023-12-21 10:28:51,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935771304] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 10:28:51,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 10:28:51,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-21 10:28:51,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253798996] [2023-12-21 10:28:51,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 10:28:51,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-21 10:28:51,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 10:28:51,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-21 10:28:51,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-21 10:28:51,313 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-21 10:28:51,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 10:28:51,354 INFO L93 Difference]: Finished difference Result 23 states and 28 transitions. [2023-12-21 10:28:51,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-21 10:28:51,355 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2023-12-21 10:28:51,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 10:28:51,355 INFO L225 Difference]: With dead ends: 23 [2023-12-21 10:28:51,355 INFO L226 Difference]: Without dead ends: 19 [2023-12-21 10:28:51,356 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 [2023-12-21 10:28:51,357 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 10 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 10:28:51,357 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 24 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 10:28:51,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-12-21 10:28:51,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2023-12-21 10:28:51,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 12 states have internal predecessors, (13), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-12-21 10:28:51,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2023-12-21 10:28:51,361 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 10 [2023-12-21 10:28:51,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 10:28:51,361 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2023-12-21 10:28:51,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-21 10:28:51,361 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2023-12-21 10:28:51,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-12-21 10:28:51,362 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 10:28:51,362 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 10:28:51,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-21 10:28:51,362 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 10:28:51,363 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 10:28:51,363 INFO L85 PathProgramCache]: Analyzing trace with hash 913644549, now seen corresponding path program 1 times [2023-12-21 10:28:51,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 10:28:51,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873699023] [2023-12-21 10:28:51,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:28:51,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 10:28:51,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:51,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-21 10:28:51,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:51,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-21 10:28:51,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:51,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-21 10:28:51,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:51,528 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-21 10:28:51,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 10:28:51,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873699023] [2023-12-21 10:28:51,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873699023] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 10:28:51,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835099563] [2023-12-21 10:28:51,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:28:51,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:28:51,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 10:28:51,534 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) [2023-12-21 10:28:51,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-21 10:28:51,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:51,581 INFO L262 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-21 10:28:51,585 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 10:28:51,663 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-21 10:28:51,664 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 10:28:51,839 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-21 10:28:51,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835099563] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 10:28:51,843 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 10:28:51,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 12 [2023-12-21 10:28:51,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742608242] [2023-12-21 10:28:51,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 10:28:51,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-21 10:28:51,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 10:28:51,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-21 10:28:51,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-12-21 10:28:51,852 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 12 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 12 states have internal predecessors, (29), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 8 states have call successors, (8) [2023-12-21 10:28:51,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 10:28:51,934 INFO L93 Difference]: Finished difference Result 34 states and 45 transitions. [2023-12-21 10:28:51,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-21 10:28:51,935 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 12 states have internal predecessors, (29), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 8 states have call successors, (8) Word has length 22 [2023-12-21 10:28:51,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 10:28:51,937 INFO L225 Difference]: With dead ends: 34 [2023-12-21 10:28:51,937 INFO L226 Difference]: Without dead ends: 19 [2023-12-21 10:28:51,939 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2023-12-21 10:28:51,942 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 28 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 10:28:51,943 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 42 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 10:28:51,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-12-21 10:28:51,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2023-12-21 10:28:51,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 14 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-12-21 10:28:51,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2023-12-21 10:28:51,954 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 22 [2023-12-21 10:28:51,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 10:28:51,954 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2023-12-21 10:28:51,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 12 states have internal predecessors, (29), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 8 states have call successors, (8) [2023-12-21 10:28:51,955 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2023-12-21 10:28:51,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-12-21 10:28:51,957 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 10:28:51,957 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 10:28:51,967 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-21 10:28:52,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:28:52,167 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 10:28:52,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 10:28:52,169 INFO L85 PathProgramCache]: Analyzing trace with hash -252103063, now seen corresponding path program 1 times [2023-12-21 10:28:52,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 10:28:52,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107344819] [2023-12-21 10:28:52,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:28:52,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 10:28:52,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:52,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-21 10:28:52,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:52,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-21 10:28:52,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:52,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-12-21 10:28:52,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:52,273 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-21 10:28:52,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 10:28:52,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107344819] [2023-12-21 10:28:52,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107344819] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 10:28:52,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098697513] [2023-12-21 10:28:52,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:28:52,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:28:52,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 10:28:52,275 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) [2023-12-21 10:28:52,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:52,304 INFO L262 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-21 10:28:52,305 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 10:28:52,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-21 10:28:52,342 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-21 10:28:52,342 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 10:28:52,449 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-21 10:28:52,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098697513] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 10:28:52,450 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 10:28:52,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 11 [2023-12-21 10:28:52,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574433691] [2023-12-21 10:28:52,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 10:28:52,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-21 10:28:52,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 10:28:52,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-21 10:28:52,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2023-12-21 10:28:52,451 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 11 states, 9 states have (on average 3.0) internal successors, (27), 11 states have internal predecessors, (27), 7 states have call successors, (7), 1 states have call predecessors, (7), 3 states have return successors, (7), 3 states have call predecessors, (7), 7 states have call successors, (7) [2023-12-21 10:28:52,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 10:28:52,509 INFO L93 Difference]: Finished difference Result 37 states and 51 transitions. [2023-12-21 10:28:52,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-21 10:28:52,510 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 3.0) internal successors, (27), 11 states have internal predecessors, (27), 7 states have call successors, (7), 1 states have call predecessors, (7), 3 states have return successors, (7), 3 states have call predecessors, (7), 7 states have call successors, (7) Word has length 23 [2023-12-21 10:28:52,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 10:28:52,511 INFO L225 Difference]: With dead ends: 37 [2023-12-21 10:28:52,511 INFO L226 Difference]: Without dead ends: 33 [2023-12-21 10:28:52,511 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2023-12-21 10:28:52,512 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 21 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 10:28:52,512 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 49 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 10:28:52,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-12-21 10:28:52,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2023-12-21 10:28:52,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 23 states have internal predecessors, (25), 6 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (16), 7 states have call predecessors, (16), 6 states have call successors, (16) [2023-12-21 10:28:52,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 47 transitions. [2023-12-21 10:28:52,518 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 47 transitions. Word has length 23 [2023-12-21 10:28:52,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 10:28:52,518 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 47 transitions. [2023-12-21 10:28:52,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 3.0) internal successors, (27), 11 states have internal predecessors, (27), 7 states have call successors, (7), 1 states have call predecessors, (7), 3 states have return successors, (7), 3 states have call predecessors, (7), 7 states have call successors, (7) [2023-12-21 10:28:52,518 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 47 transitions. [2023-12-21 10:28:52,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-12-21 10:28:52,519 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 10:28:52,519 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 10:28:52,526 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-21 10:28:52,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-12-21 10:28:52,724 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 10:28:52,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 10:28:52,725 INFO L85 PathProgramCache]: Analyzing trace with hash 659330, now seen corresponding path program 2 times [2023-12-21 10:28:52,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 10:28:52,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727457368] [2023-12-21 10:28:52,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:28:52,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 10:28:52,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:52,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-21 10:28:52,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:52,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-21 10:28:52,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:52,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-21 10:28:52,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:52,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-12-21 10:28:52,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:52,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-12-21 10:28:52,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:52,835 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 23 proven. 7 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-12-21 10:28:52,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 10:28:52,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727457368] [2023-12-21 10:28:52,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727457368] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 10:28:52,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255723386] [2023-12-21 10:28:52,836 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-21 10:28:52,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:28:52,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 10:28:52,837 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) [2023-12-21 10:28:52,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-21 10:28:52,893 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-21 10:28:52,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 10:28:52,893 INFO L262 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-21 10:28:52,895 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 10:28:52,948 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-12-21 10:28:52,948 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 10:28:53,176 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-12-21 10:28:53,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255723386] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 10:28:53,177 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 10:28:53,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 9] total 17 [2023-12-21 10:28:53,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907651504] [2023-12-21 10:28:53,177 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 10:28:53,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-12-21 10:28:53,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 10:28:53,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-12-21 10:28:53,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2023-12-21 10:28:53,178 INFO L87 Difference]: Start difference. First operand 33 states and 47 transitions. Second operand has 17 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 17 states have internal predecessors, (43), 10 states have call successors, (12), 1 states have call predecessors, (12), 7 states have return successors, (13), 6 states have call predecessors, (13), 10 states have call successors, (13) [2023-12-21 10:28:53,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 10:28:53,297 INFO L93 Difference]: Finished difference Result 68 states and 105 transitions. [2023-12-21 10:28:53,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-12-21 10:28:53,297 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 17 states have internal predecessors, (43), 10 states have call successors, (12), 1 states have call predecessors, (12), 7 states have return successors, (13), 6 states have call predecessors, (13), 10 states have call successors, (13) Word has length 36 [2023-12-21 10:28:53,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 10:28:53,298 INFO L225 Difference]: With dead ends: 68 [2023-12-21 10:28:53,298 INFO L226 Difference]: Without dead ends: 37 [2023-12-21 10:28:53,299 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 73 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=368, Unknown=0, NotChecked=0, Total=506 [2023-12-21 10:28:53,299 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 30 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-21 10:28:53,300 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 71 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-21 10:28:53,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-12-21 10:28:53,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2023-12-21 10:28:53,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 25 states have internal predecessors, (29), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (11), 7 states have call predecessors, (11), 5 states have call successors, (11) [2023-12-21 10:28:53,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2023-12-21 10:28:53,304 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 36 [2023-12-21 10:28:53,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 10:28:53,304 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2023-12-21 10:28:53,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 17 states have internal predecessors, (43), 10 states have call successors, (12), 1 states have call predecessors, (12), 7 states have return successors, (13), 6 states have call predecessors, (13), 10 states have call successors, (13) [2023-12-21 10:28:53,304 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2023-12-21 10:28:53,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-12-21 10:28:53,306 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 10:28:53,306 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 11, 6, 6, 6, 6, 6, 6, 6, 5, 2, 1, 1, 1, 1, 1, 1] [2023-12-21 10:28:53,322 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-21 10:28:53,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:28:53,511 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 10:28:53,511 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 10:28:53,511 INFO L85 PathProgramCache]: Analyzing trace with hash -867130448, now seen corresponding path program 3 times [2023-12-21 10:28:53,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 10:28:53,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178906823] [2023-12-21 10:28:53,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:28:53,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 10:28:53,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:53,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-21 10:28:53,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:53,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-21 10:28:53,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:53,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-21 10:28:53,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:53,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-21 10:28:53,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:53,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-12-21 10:28:53,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:53,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-12-21 10:28:53,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:53,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-12-21 10:28:53,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:53,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-21 10:28:53,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:53,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-21 10:28:53,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:53,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-21 10:28:53,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:53,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-12-21 10:28:53,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:53,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-12-21 10:28:53,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:53,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-12-21 10:28:53,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:53,762 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 27 proven. 166 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2023-12-21 10:28:53,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 10:28:53,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178906823] [2023-12-21 10:28:53,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178906823] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 10:28:53,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195866419] [2023-12-21 10:28:53,763 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-21 10:28:53,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:28:53,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 10:28:53,770 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) [2023-12-21 10:28:53,820 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-21 10:28:53,837 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-12-21 10:28:53,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 10:28:53,838 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-21 10:28:53,843 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 10:28:53,891 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 174 proven. 17 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked. [2023-12-21 10:28:53,891 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 10:28:54,199 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 174 proven. 18 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2023-12-21 10:28:54,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195866419] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 10:28:54,199 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 10:28:54,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 9] total 19 [2023-12-21 10:28:54,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982068283] [2023-12-21 10:28:54,200 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 10:28:54,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-12-21 10:28:54,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 10:28:54,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-12-21 10:28:54,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2023-12-21 10:28:54,202 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand has 19 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 19 states have internal predecessors, (51), 9 states have call successors, (13), 1 states have call predecessors, (13), 8 states have return successors, (17), 12 states have call predecessors, (17), 9 states have call successors, (17) [2023-12-21 10:28:54,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 10:28:54,387 INFO L93 Difference]: Finished difference Result 88 states and 132 transitions. [2023-12-21 10:28:54,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-12-21 10:28:54,387 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 19 states have internal predecessors, (51), 9 states have call successors, (13), 1 states have call predecessors, (13), 8 states have return successors, (17), 12 states have call predecessors, (17), 9 states have call successors, (17) Word has length 92 [2023-12-21 10:28:54,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 10:28:54,389 INFO L225 Difference]: With dead ends: 88 [2023-12-21 10:28:54,389 INFO L226 Difference]: Without dead ends: 52 [2023-12-21 10:28:54,390 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 196 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=234, Invalid=636, Unknown=0, NotChecked=0, Total=870 [2023-12-21 10:28:54,390 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 46 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-21 10:28:54,390 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 83 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-21 10:28:54,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-12-21 10:28:54,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 49. [2023-12-21 10:28:54,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 33 states have internal predecessors, (38), 8 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (16), 9 states have call predecessors, (16), 8 states have call successors, (16) [2023-12-21 10:28:54,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 62 transitions. [2023-12-21 10:28:54,397 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 62 transitions. Word has length 92 [2023-12-21 10:28:54,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 10:28:54,398 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 62 transitions. [2023-12-21 10:28:54,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 19 states have internal predecessors, (51), 9 states have call successors, (13), 1 states have call predecessors, (13), 8 states have return successors, (17), 12 states have call predecessors, (17), 9 states have call successors, (17) [2023-12-21 10:28:54,398 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 62 transitions. [2023-12-21 10:28:54,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2023-12-21 10:28:54,416 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 10:28:54,417 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 15, 9, 9, 9, 9, 9, 9, 9, 6, 4, 1, 1, 1, 1, 1, 1] [2023-12-21 10:28:54,421 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-21 10:28:54,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:28:54,621 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 10:28:54,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 10:28:54,622 INFO L85 PathProgramCache]: Analyzing trace with hash 1193756999, now seen corresponding path program 4 times [2023-12-21 10:28:54,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 10:28:54,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52028105] [2023-12-21 10:28:54,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:28:54,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 10:28:54,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:54,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-21 10:28:54,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:54,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-21 10:28:54,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:54,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-21 10:28:54,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:54,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-21 10:28:54,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:54,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-21 10:28:54,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:54,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-12-21 10:28:54,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:54,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-12-21 10:28:54,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:54,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-12-21 10:28:54,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:54,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-21 10:28:54,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:54,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-12-21 10:28:54,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:54,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2023-12-21 10:28:54,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:54,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-21 10:28:54,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:54,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-21 10:28:54,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:55,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-21 10:28:55,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:55,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-12-21 10:28:55,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:55,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-12-21 10:28:55,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:55,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-12-21 10:28:55,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:55,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-21 10:28:55,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:55,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-12-21 10:28:55,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:55,039 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 198 proven. 308 refuted. 0 times theorem prover too weak. 427 trivial. 0 not checked. [2023-12-21 10:28:55,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 10:28:55,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52028105] [2023-12-21 10:28:55,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52028105] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 10:28:55,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69471539] [2023-12-21 10:28:55,040 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-21 10:28:55,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:28:55,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 10:28:55,041 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) [2023-12-21 10:28:55,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-21 10:28:55,113 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-21 10:28:55,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 10:28:55,115 INFO L262 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 18 conjunts are in the unsatisfiable core [2023-12-21 10:28:55,117 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 10:28:55,205 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 207 proven. 356 refuted. 0 times theorem prover too weak. 370 trivial. 0 not checked. [2023-12-21 10:28:55,205 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 10:28:56,206 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 207 proven. 383 refuted. 0 times theorem prover too weak. 343 trivial. 0 not checked. [2023-12-21 10:28:56,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69471539] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 10:28:56,206 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 10:28:56,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 13, 19] total 30 [2023-12-21 10:28:56,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143897983] [2023-12-21 10:28:56,206 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 10:28:56,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-12-21 10:28:56,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 10:28:56,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-12-21 10:28:56,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=658, Unknown=0, NotChecked=0, Total=870 [2023-12-21 10:28:56,208 INFO L87 Difference]: Start difference. First operand 49 states and 62 transitions. Second operand has 30 states, 29 states have (on average 2.7586206896551726) internal successors, (80), 30 states have internal predecessors, (80), 24 states have call successors, (27), 1 states have call predecessors, (27), 10 states have return successors, (36), 15 states have call predecessors, (36), 24 states have call successors, (36) [2023-12-21 10:28:56,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 10:28:56,411 INFO L93 Difference]: Finished difference Result 111 states and 164 transitions. [2023-12-21 10:28:56,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-12-21 10:28:56,411 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.7586206896551726) internal successors, (80), 30 states have internal predecessors, (80), 24 states have call successors, (27), 1 states have call predecessors, (27), 10 states have return successors, (36), 15 states have call predecessors, (36), 24 states have call successors, (36) Word has length 132 [2023-12-21 10:28:56,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 10:28:56,412 INFO L225 Difference]: With dead ends: 111 [2023-12-21 10:28:56,412 INFO L226 Difference]: Without dead ends: 68 [2023-12-21 10:28:56,413 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 281 SyntacticMatches, 9 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 586 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=455, Invalid=1267, Unknown=0, NotChecked=0, Total=1722 [2023-12-21 10:28:56,414 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 75 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-21 10:28:56,414 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 112 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-21 10:28:56,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2023-12-21 10:28:56,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 59. [2023-12-21 10:28:56,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 42 states have (on average 1.0476190476190477) internal successors, (44), 40 states have internal predecessors, (44), 10 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (20), 10 states have call predecessors, (20), 10 states have call successors, (20) [2023-12-21 10:28:56,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 74 transitions. [2023-12-21 10:28:56,420 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 74 transitions. Word has length 132 [2023-12-21 10:28:56,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 10:28:56,420 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 74 transitions. [2023-12-21 10:28:56,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.7586206896551726) internal successors, (80), 30 states have internal predecessors, (80), 24 states have call successors, (27), 1 states have call predecessors, (27), 10 states have return successors, (36), 15 states have call predecessors, (36), 24 states have call successors, (36) [2023-12-21 10:28:56,421 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 74 transitions. [2023-12-21 10:28:56,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2023-12-21 10:28:56,421 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 10:28:56,421 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 12, 7, 7, 7, 7, 7, 7, 7, 5, 3, 1, 1, 1, 1, 1, 1] [2023-12-21 10:28:56,428 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-12-21 10:28:56,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:28:56,626 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 10:28:56,627 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 10:28:56,627 INFO L85 PathProgramCache]: Analyzing trace with hash -1696376591, now seen corresponding path program 5 times [2023-12-21 10:28:56,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 10:28:56,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308820888] [2023-12-21 10:28:56,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:28:56,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 10:28:56,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:56,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-21 10:28:56,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:56,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-21 10:28:56,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:57,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-21 10:28:57,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:57,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-21 10:28:57,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:57,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-21 10:28:57,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:57,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-12-21 10:28:57,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:57,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-12-21 10:28:57,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:57,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-12-21 10:28:57,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:57,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-21 10:28:57,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:57,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-12-21 10:28:57,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:57,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2023-12-21 10:28:57,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:57,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-21 10:28:57,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:57,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-21 10:28:57,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:57,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-12-21 10:28:57,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:57,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-12-21 10:28:57,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:57,206 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 185 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2023-12-21 10:28:57,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 10:28:57,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308820888] [2023-12-21 10:28:57,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308820888] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 10:28:57,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359191517] [2023-12-21 10:28:57,207 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-21 10:28:57,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:28:57,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 10:28:57,208 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) [2023-12-21 10:28:57,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-21 10:28:57,303 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2023-12-21 10:28:57,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 10:28:57,305 INFO L262 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 63 conjunts are in the unsatisfiable core [2023-12-21 10:28:57,307 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 10:28:57,447 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 185 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2023-12-21 10:28:57,448 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 10:28:57,708 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 185 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2023-12-21 10:28:57,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359191517] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 10:28:57,708 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 10:28:57,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 20 [2023-12-21 10:28:57,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805211206] [2023-12-21 10:28:57,709 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 10:28:57,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-12-21 10:28:57,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 10:28:57,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-12-21 10:28:57,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2023-12-21 10:28:57,711 INFO L87 Difference]: Start difference. First operand 59 states and 74 transitions. Second operand has 20 states, 20 states have (on average 1.25) internal successors, (25), 11 states have internal predecessors, (25), 4 states have call successors, (5), 1 states have call predecessors, (5), 5 states have return successors, (12), 12 states have call predecessors, (12), 4 states have call successors, (12) [2023-12-21 10:28:57,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 10:28:57,802 INFO L93 Difference]: Finished difference Result 72 states and 93 transitions. [2023-12-21 10:28:57,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-12-21 10:28:57,802 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.25) internal successors, (25), 11 states have internal predecessors, (25), 4 states have call successors, (5), 1 states have call predecessors, (5), 5 states have return successors, (12), 12 states have call predecessors, (12), 4 states have call successors, (12) Word has length 105 [2023-12-21 10:28:57,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 10:28:57,806 INFO L225 Difference]: With dead ends: 72 [2023-12-21 10:28:57,806 INFO L226 Difference]: Without dead ends: 68 [2023-12-21 10:28:57,807 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 253 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2023-12-21 10:28:57,808 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 0 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-21 10:28:57,808 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 403 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-21 10:28:57,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2023-12-21 10:28:57,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2023-12-21 10:28:57,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 47 states have (on average 1.0425531914893618) internal successors, (49), 45 states have internal predecessors, (49), 11 states have call successors, (11), 8 states have call predecessors, (11), 8 states have return successors, (27), 13 states have call predecessors, (27), 11 states have call successors, (27) [2023-12-21 10:28:57,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 87 transitions. [2023-12-21 10:28:57,827 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 87 transitions. Word has length 105 [2023-12-21 10:28:57,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 10:28:57,828 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 87 transitions. [2023-12-21 10:28:57,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.25) internal successors, (25), 11 states have internal predecessors, (25), 4 states have call successors, (5), 1 states have call predecessors, (5), 5 states have return successors, (12), 12 states have call predecessors, (12), 4 states have call successors, (12) [2023-12-21 10:28:57,828 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 87 transitions. [2023-12-21 10:28:57,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2023-12-21 10:28:57,829 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 10:28:57,829 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 15, 9, 9, 9, 9, 9, 9, 9, 6, 4, 1, 1, 1, 1, 1, 1] [2023-12-21 10:28:57,838 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-12-21 10:28:58,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:28:58,030 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 10:28:58,030 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 10:28:58,030 INFO L85 PathProgramCache]: Analyzing trace with hash 725563789, now seen corresponding path program 6 times [2023-12-21 10:28:58,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 10:28:58,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742414317] [2023-12-21 10:28:58,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:28:58,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 10:28:58,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:58,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-21 10:28:58,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:58,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-21 10:28:58,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:58,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-21 10:28:58,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:58,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-21 10:28:58,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:58,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-21 10:28:58,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:58,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-21 10:28:58,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:58,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-12-21 10:28:58,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:58,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-12-21 10:28:58,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:58,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-12-21 10:28:58,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:58,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-21 10:28:58,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:58,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-12-21 10:28:58,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:58,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2023-12-21 10:28:58,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:58,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-21 10:28:58,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:58,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-12-21 10:28:58,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:58,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2023-12-21 10:28:58,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:58,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-21 10:28:58,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:58,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-21 10:28:58,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:58,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-12-21 10:28:58,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:58,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-12-21 10:28:58,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:58,303 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 230 proven. 170 refuted. 0 times theorem prover too weak. 533 trivial. 0 not checked. [2023-12-21 10:28:58,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 10:28:58,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742414317] [2023-12-21 10:28:58,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742414317] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 10:28:58,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73089900] [2023-12-21 10:28:58,304 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-21 10:28:58,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:28:58,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 10:28:58,305 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) [2023-12-21 10:28:58,328 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-21 10:28:58,376 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2023-12-21 10:28:58,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 10:28:58,378 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-21 10:28:58,379 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 10:28:58,464 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 131 proven. 302 refuted. 0 times theorem prover too weak. 500 trivial. 0 not checked. [2023-12-21 10:28:58,464 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 10:28:59,413 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 131 proven. 337 refuted. 0 times theorem prover too weak. 465 trivial. 0 not checked. [2023-12-21 10:28:59,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73089900] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 10:28:59,414 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 10:28:59,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 15] total 23 [2023-12-21 10:28:59,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192048385] [2023-12-21 10:28:59,414 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 10:28:59,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-12-21 10:28:59,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 10:28:59,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-12-21 10:28:59,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=384, Unknown=0, NotChecked=0, Total=506 [2023-12-21 10:28:59,415 INFO L87 Difference]: Start difference. First operand 67 states and 87 transitions. Second operand has 23 states, 22 states have (on average 3.0) internal successors, (66), 23 states have internal predecessors, (66), 18 states have call successors, (21), 1 states have call predecessors, (21), 10 states have return successors, (29), 12 states have call predecessors, (29), 18 states have call successors, (29) [2023-12-21 10:28:59,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 10:28:59,580 INFO L93 Difference]: Finished difference Result 127 states and 185 transitions. [2023-12-21 10:28:59,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-12-21 10:28:59,581 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 3.0) internal successors, (66), 23 states have internal predecessors, (66), 18 states have call successors, (21), 1 states have call predecessors, (21), 10 states have return successors, (29), 12 states have call predecessors, (29), 18 states have call successors, (29) Word has length 132 [2023-12-21 10:28:59,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 10:28:59,581 INFO L225 Difference]: With dead ends: 127 [2023-12-21 10:28:59,581 INFO L226 Difference]: Without dead ends: 0 [2023-12-21 10:28:59,582 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 284 SyntacticMatches, 7 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=241, Invalid=629, Unknown=0, NotChecked=0, Total=870 [2023-12-21 10:28:59,582 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 35 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-21 10:28:59,582 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 105 Invalid, 342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-21 10:28:59,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-12-21 10:28:59,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-12-21 10:28:59,583 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) [2023-12-21 10:28:59,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-12-21 10:28:59,583 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 132 [2023-12-21 10:28:59,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 10:28:59,583 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-12-21 10:28:59,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 3.0) internal successors, (66), 23 states have internal predecessors, (66), 18 states have call successors, (21), 1 states have call predecessors, (21), 10 states have return successors, (29), 12 states have call predecessors, (29), 18 states have call successors, (29) [2023-12-21 10:28:59,584 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-12-21 10:28:59,584 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-12-21 10:28:59,586 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-21 10:28:59,607 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-12-21 10:28:59,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:28:59,808 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2023-12-21 10:29:00,009 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2023-12-21 10:29:00,009 INFO L899 garLoopResultBuilder]: For program point L29(line 29) no Hoare annotation was computed. [2023-12-21 10:29:00,009 INFO L899 garLoopResultBuilder]: For program point L28(lines 28 30) no Hoare annotation was computed. [2023-12-21 10:29:00,009 INFO L895 garLoopResultBuilder]: At program point L27(line 27) the Hoare annotation is: (= 5 |ULTIMATE.start_main_~x~0#1|) [2023-12-21 10:29:00,010 INFO L899 garLoopResultBuilder]: For program point L27-1(line 27) no Hoare annotation was computed. [2023-12-21 10:29:00,010 INFO L899 garLoopResultBuilder]: For program point L28-2(lines 28 30) no Hoare annotation was computed. [2023-12-21 10:29:00,010 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 29) no Hoare annotation was computed. [2023-12-21 10:29:00,010 INFO L899 garLoopResultBuilder]: For program point $Ultimate##0(line -1) no Hoare annotation was computed. [2023-12-21 10:29:00,010 INFO L899 garLoopResultBuilder]: For program point fiboEXIT(lines 7 15) no Hoare annotation was computed. [2023-12-21 10:29:00,010 INFO L899 garLoopResultBuilder]: For program point fiboFINAL(lines 7 15) no Hoare annotation was computed. [2023-12-21 10:29:00,010 INFO L895 garLoopResultBuilder]: At program point L13(line 13) the Hoare annotation is: (and (= fibo_~n |fibo_#in~n|) (or (= fibo_~n 2) (< 2 |fibo_#in~n|))) [2023-12-21 10:29:00,010 INFO L899 garLoopResultBuilder]: For program point L13-1(line 13) no Hoare annotation was computed. [2023-12-21 10:29:00,010 INFO L895 garLoopResultBuilder]: At program point L13-2(line 13) the Hoare annotation is: (let ((.cse1 (= fibo_~n |fibo_#in~n|)) (.cse0 (= |fibo_#t~ret4| 1))) (or (and (= 2 |fibo_#in~n|) (= fibo_~n 2) .cse0) (and .cse1 (<= 5 |fibo_#in~n|) (= |fibo_#t~ret4| 3)) (and .cse1 (<= 6 |fibo_#in~n|)) (and (= fibo_~n 4) (= |fibo_#t~ret4| 2) (= 4 |fibo_#in~n|)) (and (= 3 |fibo_#in~n|) .cse0 (= fibo_~n 3)))) [2023-12-21 10:29:00,010 INFO L899 garLoopResultBuilder]: For program point L10(lines 10 14) no Hoare annotation was computed. [2023-12-21 10:29:00,011 INFO L899 garLoopResultBuilder]: For program point L13-3(line 13) no Hoare annotation was computed. [2023-12-21 10:29:00,011 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 7 15) the Hoare annotation is: true [2023-12-21 10:29:00,011 INFO L899 garLoopResultBuilder]: For program point L8(lines 8 14) no Hoare annotation was computed. [2023-12-21 10:29:00,014 INFO L445 BasicCegarLoop]: Path program histogram: [6, 1, 1, 1] [2023-12-21 10:29:00,016 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-12-21 10:29:00,019 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.12 10:29:00 BoogieIcfgContainer [2023-12-21 10:29:00,019 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-21 10:29:00,019 INFO L158 Benchmark]: Toolchain (without parser) took 9611.27ms. Allocated memory was 164.6MB in the beginning and 329.3MB in the end (delta: 164.6MB). Free memory was 103.4MB in the beginning and 232.2MB in the end (delta: -128.8MB). Peak memory consumption was 36.8MB. Max. memory is 8.0GB. [2023-12-21 10:29:00,020 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 164.6MB. Free memory was 115.0MB in the beginning and 114.8MB in the end (delta: 140.1kB). There was no memory consumed. Max. memory is 8.0GB. [2023-12-21 10:29:00,020 INFO L158 Benchmark]: CACSL2BoogieTranslator took 170.53ms. Allocated memory is still 164.6MB. Free memory was 103.4MB in the beginning and 92.9MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2023-12-21 10:29:00,020 INFO L158 Benchmark]: Boogie Procedure Inliner took 24.11ms. Allocated memory is still 164.6MB. Free memory was 92.9MB in the beginning and 91.5MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-12-21 10:29:00,020 INFO L158 Benchmark]: Boogie Preprocessor took 17.92ms. Allocated memory is still 164.6MB. Free memory was 91.5MB in the beginning and 90.2MB in the end (delta: 1.2MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-12-21 10:29:00,020 INFO L158 Benchmark]: RCFGBuilder took 220.40ms. Allocated memory is still 164.6MB. Free memory was 89.8MB in the beginning and 79.9MB in the end (delta: 9.9MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2023-12-21 10:29:00,021 INFO L158 Benchmark]: TraceAbstraction took 9174.17ms. Allocated memory was 164.6MB in the beginning and 329.3MB in the end (delta: 164.6MB). Free memory was 79.3MB in the beginning and 232.2MB in the end (delta: -152.9MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2023-12-21 10:29:00,022 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 164.6MB. Free memory was 115.0MB in the beginning and 114.8MB in the end (delta: 140.1kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 170.53ms. Allocated memory is still 164.6MB. Free memory was 103.4MB in the beginning and 92.9MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 24.11ms. Allocated memory is still 164.6MB. Free memory was 92.9MB in the beginning and 91.5MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 17.92ms. Allocated memory is still 164.6MB. Free memory was 91.5MB in the beginning and 90.2MB in the end (delta: 1.2MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 220.40ms. Allocated memory is still 164.6MB. Free memory was 89.8MB in the beginning and 79.9MB in the end (delta: 9.9MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * TraceAbstraction took 9174.17ms. Allocated memory was 164.6MB in the beginning and 329.3MB in the end (delta: 164.6MB). Free memory was 79.3MB in the beginning and 232.2MB in the end (delta: -152.9MB). Peak memory consumption was 12.6MB. 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: 29]: 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, 17 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 9.1s, OverallIterations: 9, TraceHistogramMax: 19, PathProgramHistogramMax: 6, EmptinessCheckTime: 0.0s, AutomataDifference: 1.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 283 SdHoareTripleChecker+Valid, 0.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 257 mSDsluCounter, 916 SdHoareTripleChecker+Invalid, 0.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 761 mSDsCounter, 226 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1400 IncrementalHoareTripleChecker+Invalid, 1626 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 226 mSolverCounterUnsat, 155 mSDtfsCounter, 1400 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1375 GetRequests, 1181 SyntacticMatches, 27 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1223 ImplicationChecksByTransitivity, 1.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=67occurred in iteration=8, InterpolantAutomatonStates: 114, 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, 9 MinimizatonAttempts, 15 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 4 LocationsWithAnnotation, 118 PreInvPairs, 156 NumberOfFragments, 63 HoareAnnotationTreeSize, 118 FormulaSimplifications, 630 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 4 FormulaSimplificationsInter, 689 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 5.6s InterpolantComputationTime, 1103 NumberOfCodeBlocks, 1049 NumberOfCodeBlocksAsserted, 51 NumberOfCheckSat, 1622 ConstructedInterpolants, 0 QuantifiedInterpolants, 3350 SizeOfPredicates, 24 NumberOfNonLiveVariables, 1195 ConjunctsInSsa, 123 ConjunctsInUnsatCore, 23 InterpolantComputations, 2 PerfectInterpolantSequences, 6101/8805 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! [2023-12-21 10:29:00,044 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...