/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.use.bitabs.translation true -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/loop-invgen/sendmail-close-angle.i -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-19 17:56:16,271 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-19 17:56:16,311 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-12-19 17:56:16,314 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-19 17:56:16,314 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-19 17:56:16,343 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-19 17:56:16,344 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-19 17:56:16,344 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-19 17:56:16,344 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-19 17:56:16,345 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-19 17:56:16,345 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-19 17:56:16,345 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-19 17:56:16,345 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-19 17:56:16,346 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-19 17:56:16,346 INFO L153 SettingsManager]: * Use SBE=true [2023-12-19 17:56:16,346 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-19 17:56:16,346 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-19 17:56:16,347 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-19 17:56:16,347 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-19 17:56:16,347 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-19 17:56:16,347 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-19 17:56:16,348 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-19 17:56:16,348 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-19 17:56:16,348 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-19 17:56:16,348 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-19 17:56:16,349 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-19 17:56:16,349 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-19 17:56:16,349 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-19 17:56:16,349 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-19 17:56:16,350 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-19 17:56:16,350 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-19 17:56:16,350 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-19 17:56:16,350 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-19 17:56:16,350 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-19 17:56:16,351 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-19 17:56:16,351 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-19 17:56:16,351 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-19 17:56:16,351 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-19 17:56:16,351 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-19 17:56:16,351 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-19 17:56:16,352 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-19 17:56:16,353 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-19 17:56:16,353 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-19 17:56:16,353 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> true [2023-12-19 17:56:16,543 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-19 17:56:16,561 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-19 17:56:16,563 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-19 17:56:16,564 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-19 17:56:16,564 INFO L274 PluginConnector]: CDTParser initialized [2023-12-19 17:56:16,565 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/sendmail-close-angle.i [2023-12-19 17:56:17,531 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-19 17:56:17,681 INFO L384 CDTParser]: Found 1 translation units. [2023-12-19 17:56:17,682 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/sendmail-close-angle.i [2023-12-19 17:56:17,688 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/467a1c51e/e4ee7c9506ba4d61a9a9e5658d27a913/FLAG3d795f243 [2023-12-19 17:56:17,702 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/467a1c51e/e4ee7c9506ba4d61a9a9e5658d27a913 [2023-12-19 17:56:17,704 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-19 17:56:17,705 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-19 17:56:17,706 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-19 17:56:17,706 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-19 17:56:17,709 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-19 17:56:17,710 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.12 05:56:17" (1/1) ... [2023-12-19 17:56:17,711 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25e45d94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 05:56:17, skipping insertion in model container [2023-12-19 17:56:17,711 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.12 05:56:17" (1/1) ... [2023-12-19 17:56:17,726 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-19 17:56:17,814 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/sendmail-close-angle.i[893,906] [2023-12-19 17:56:17,822 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-19 17:56:17,828 INFO L202 MainTranslator]: Completed pre-run [2023-12-19 17:56:17,835 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/sendmail-close-angle.i[893,906] [2023-12-19 17:56:17,839 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-19 17:56:17,848 INFO L206 MainTranslator]: Completed translation [2023-12-19 17:56:17,848 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 05:56:17 WrapperNode [2023-12-19 17:56:17,849 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-19 17:56:17,849 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-19 17:56:17,849 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-19 17:56:17,849 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-19 17:56:17,854 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 05:56:17" (1/1) ... [2023-12-19 17:56:17,858 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 05:56:17" (1/1) ... [2023-12-19 17:56:17,869 INFO L138 Inliner]: procedures = 16, calls = 14, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 61 [2023-12-19 17:56:17,869 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-19 17:56:17,869 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-19 17:56:17,869 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-19 17:56:17,869 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-19 17:56:17,876 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 05:56:17" (1/1) ... [2023-12-19 17:56:17,876 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 05:56:17" (1/1) ... [2023-12-19 17:56:17,876 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 05:56:17" (1/1) ... [2023-12-19 17:56:17,884 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2023-12-19 17:56:17,884 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 05:56:17" (1/1) ... [2023-12-19 17:56:17,884 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 05:56:17" (1/1) ... [2023-12-19 17:56:17,886 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 05:56:17" (1/1) ... [2023-12-19 17:56:17,888 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 05:56:17" (1/1) ... [2023-12-19 17:56:17,888 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 05:56:17" (1/1) ... [2023-12-19 17:56:17,889 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 05:56:17" (1/1) ... [2023-12-19 17:56:17,890 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-19 17:56:17,890 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-19 17:56:17,890 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-19 17:56:17,890 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-19 17:56:17,891 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 05:56:17" (1/1) ... [2023-12-19 17:56:17,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-19 17:56:17,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 17:56:17,924 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-12-19 17:56:17,932 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-12-19 17:56:17,948 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-19 17:56:17,948 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-19 17:56:17,948 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-19 17:56:17,948 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-19 17:56:17,948 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-12-19 17:56:17,948 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-12-19 17:56:17,994 INFO L241 CfgBuilder]: Building ICFG [2023-12-19 17:56:17,996 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-19 17:56:18,111 INFO L282 CfgBuilder]: Performing block encoding [2023-12-19 17:56:18,130 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-19 17:56:18,130 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-12-19 17:56:18,130 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.12 05:56:18 BoogieIcfgContainer [2023-12-19 17:56:18,130 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-19 17:56:18,132 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-19 17:56:18,132 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-19 17:56:18,134 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-19 17:56:18,134 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.12 05:56:17" (1/3) ... [2023-12-19 17:56:18,134 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50dd5129 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.12 05:56:18, skipping insertion in model container [2023-12-19 17:56:18,135 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 05:56:17" (2/3) ... [2023-12-19 17:56:18,135 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50dd5129 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.12 05:56:18, skipping insertion in model container [2023-12-19 17:56:18,135 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.12 05:56:18" (3/3) ... [2023-12-19 17:56:18,136 INFO L112 eAbstractionObserver]: Analyzing ICFG sendmail-close-angle.i [2023-12-19 17:56:18,147 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-19 17:56:18,147 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-19 17:56:18,193 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-19 17:56:18,198 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;@10927bac, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-19 17:56:18,199 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-19 17:56:18,202 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 17 states have internal predecessors, (23), 8 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-12-19 17:56:18,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-12-19 17:56:18,207 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 17:56:18,207 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 17:56:18,208 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 17:56:18,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 17:56:18,211 INFO L85 PathProgramCache]: Analyzing trace with hash 1062398335, now seen corresponding path program 1 times [2023-12-19 17:56:18,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 17:56:18,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599585711] [2023-12-19 17:56:18,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 17:56:18,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 17:56:18,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:56:18,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 17:56:18,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 17:56:18,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599585711] [2023-12-19 17:56:18,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599585711] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 17:56:18,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 17:56:18,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-19 17:56:18,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506232342] [2023-12-19 17:56:18,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 17:56:18,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-19 17:56:18,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 17:56:18,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-19 17:56:18,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-19 17:56:18,382 INFO L87 Difference]: Start difference. First operand has 26 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 17 states have internal predecessors, (23), 8 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:56:18,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 17:56:18,422 INFO L93 Difference]: Finished difference Result 48 states and 79 transitions. [2023-12-19 17:56:18,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-19 17:56:18,425 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-12-19 17:56:18,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 17:56:18,430 INFO L225 Difference]: With dead ends: 48 [2023-12-19 17:56:18,430 INFO L226 Difference]: Without dead ends: 23 [2023-12-19 17:56:18,432 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-19 17:56:18,437 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-19 17:56:18,438 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 33 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 17:56:18,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-12-19 17:56:18,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2023-12-19 17:56:18,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 15 states have internal predecessors, (16), 8 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-12-19 17:56:18,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 31 transitions. [2023-12-19 17:56:18,470 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 31 transitions. Word has length 9 [2023-12-19 17:56:18,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 17:56:18,470 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 31 transitions. [2023-12-19 17:56:18,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:56:18,470 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 31 transitions. [2023-12-19 17:56:18,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-12-19 17:56:18,472 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 17:56:18,472 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 17:56:18,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-19 17:56:18,473 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 17:56:18,474 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 17:56:18,474 INFO L85 PathProgramCache]: Analyzing trace with hash -2013109713, now seen corresponding path program 1 times [2023-12-19 17:56:18,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 17:56:18,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154627499] [2023-12-19 17:56:18,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 17:56:18,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 17:56:18,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:56:18,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 17:56:18,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 17:56:18,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154627499] [2023-12-19 17:56:18,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154627499] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 17:56:18,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 17:56:18,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-19 17:56:18,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103692310] [2023-12-19 17:56:18,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 17:56:18,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-19 17:56:18,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 17:56:18,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-19 17:56:18,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-19 17:56:18,618 INFO L87 Difference]: Start difference. First operand 23 states and 31 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:56:18,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 17:56:18,667 INFO L93 Difference]: Finished difference Result 29 states and 36 transitions. [2023-12-19 17:56:18,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-19 17:56:18,667 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-12-19 17:56:18,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 17:56:18,668 INFO L225 Difference]: With dead ends: 29 [2023-12-19 17:56:18,668 INFO L226 Difference]: Without dead ends: 27 [2023-12-19 17:56:18,668 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-12-19 17:56:18,669 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 9 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-19 17:56:18,669 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 64 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 17:56:18,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-12-19 17:56:18,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2023-12-19 17:56:18,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 16 states have (on average 1.1875) internal successors, (19), 18 states have internal predecessors, (19), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-12-19 17:56:18,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2023-12-19 17:56:18,675 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 10 [2023-12-19 17:56:18,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 17:56:18,675 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2023-12-19 17:56:18,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:56:18,676 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2023-12-19 17:56:18,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-12-19 17:56:18,676 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 17:56:18,676 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 17:56:18,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-19 17:56:18,677 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 17:56:18,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 17:56:18,677 INFO L85 PathProgramCache]: Analyzing trace with hash -908723572, now seen corresponding path program 1 times [2023-12-19 17:56:18,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 17:56:18,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386058499] [2023-12-19 17:56:18,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 17:56:18,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 17:56:18,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:56:18,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-12-19 17:56:18,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:56:18,774 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 17:56:18,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 17:56:18,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386058499] [2023-12-19 17:56:18,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386058499] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 17:56:18,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 17:56:18,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-19 17:56:18,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780239151] [2023-12-19 17:56:18,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 17:56:18,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-19 17:56:18,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 17:56:18,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-19 17:56:18,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-19 17:56:18,776 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-19 17:56:18,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 17:56:18,867 INFO L93 Difference]: Finished difference Result 42 states and 54 transitions. [2023-12-19 17:56:18,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-19 17:56:18,868 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2023-12-19 17:56:18,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 17:56:18,871 INFO L225 Difference]: With dead ends: 42 [2023-12-19 17:56:18,871 INFO L226 Difference]: Without dead ends: 40 [2023-12-19 17:56:18,872 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-12-19 17:56:18,874 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 22 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-19 17:56:18,875 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 89 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-19 17:56:18,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-12-19 17:56:18,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2023-12-19 17:56:18,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 25 states have internal predecessors, (27), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 9 states have call predecessors, (11), 11 states have call successors, (11) [2023-12-19 17:56:18,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 50 transitions. [2023-12-19 17:56:18,882 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 50 transitions. Word has length 15 [2023-12-19 17:56:18,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 17:56:18,882 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 50 transitions. [2023-12-19 17:56:18,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-19 17:56:18,883 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 50 transitions. [2023-12-19 17:56:18,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-12-19 17:56:18,883 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 17:56:18,883 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 17:56:18,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-19 17:56:18,883 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 17:56:18,887 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 17:56:18,887 INFO L85 PathProgramCache]: Analyzing trace with hash 2036104194, now seen corresponding path program 1 times [2023-12-19 17:56:18,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 17:56:18,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408752229] [2023-12-19 17:56:18,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 17:56:18,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 17:56:18,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:56:18,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-19 17:56:18,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:56:18,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-12-19 17:56:18,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:56:18,983 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-19 17:56:18,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 17:56:18,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408752229] [2023-12-19 17:56:18,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408752229] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 17:56:18,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 17:56:18,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-19 17:56:18,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148574289] [2023-12-19 17:56:18,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 17:56:18,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-19 17:56:18,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 17:56:18,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-19 17:56:18,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-19 17:56:18,985 INFO L87 Difference]: Start difference. First operand 38 states and 50 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-19 17:56:19,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 17:56:19,066 INFO L93 Difference]: Finished difference Result 48 states and 60 transitions. [2023-12-19 17:56:19,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-19 17:56:19,066 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2023-12-19 17:56:19,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 17:56:19,067 INFO L225 Difference]: With dead ends: 48 [2023-12-19 17:56:19,067 INFO L226 Difference]: Without dead ends: 46 [2023-12-19 17:56:19,067 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-12-19 17:56:19,068 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 13 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-19 17:56:19,068 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 170 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-19 17:56:19,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2023-12-19 17:56:19,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2023-12-19 17:56:19,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 25 states have (on average 1.2) internal successors, (30), 28 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (11), 9 states have call predecessors, (11), 11 states have call successors, (11) [2023-12-19 17:56:19,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 53 transitions. [2023-12-19 17:56:19,075 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 53 transitions. Word has length 22 [2023-12-19 17:56:19,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 17:56:19,076 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 53 transitions. [2023-12-19 17:56:19,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-19 17:56:19,079 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 53 transitions. [2023-12-19 17:56:19,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-12-19 17:56:19,080 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 17:56:19,081 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 17:56:19,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-19 17:56:19,081 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 17:56:19,081 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 17:56:19,081 INFO L85 PathProgramCache]: Analyzing trace with hash -2030546205, now seen corresponding path program 1 times [2023-12-19 17:56:19,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 17:56:19,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086691783] [2023-12-19 17:56:19,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 17:56:19,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 17:56:19,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:56:19,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-12-19 17:56:19,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:56:19,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-12-19 17:56:19,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:56:19,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-12-19 17:56:19,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:56:19,217 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-19 17:56:19,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 17:56:19,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086691783] [2023-12-19 17:56:19,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086691783] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 17:56:19,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 17:56:19,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-19 17:56:19,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368613927] [2023-12-19 17:56:19,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 17:56:19,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-19 17:56:19,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 17:56:19,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-19 17:56:19,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-12-19 17:56:19,221 INFO L87 Difference]: Start difference. First operand 42 states and 53 transitions. Second operand has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-19 17:56:19,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 17:56:19,324 INFO L93 Difference]: Finished difference Result 67 states and 85 transitions. [2023-12-19 17:56:19,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-19 17:56:19,325 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2023-12-19 17:56:19,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 17:56:19,328 INFO L225 Difference]: With dead ends: 67 [2023-12-19 17:56:19,328 INFO L226 Difference]: Without dead ends: 60 [2023-12-19 17:56:19,329 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-12-19 17:56:19,334 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 33 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-19 17:56:19,335 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 77 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-19 17:56:19,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-12-19 17:56:19,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 58. [2023-12-19 17:56:19,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 35 states have (on average 1.1428571428571428) internal successors, (40), 38 states have internal predecessors, (40), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (15), 13 states have call predecessors, (15), 15 states have call successors, (15) [2023-12-19 17:56:19,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 71 transitions. [2023-12-19 17:56:19,349 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 71 transitions. Word has length 26 [2023-12-19 17:56:19,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 17:56:19,350 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 71 transitions. [2023-12-19 17:56:19,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-19 17:56:19,350 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 71 transitions. [2023-12-19 17:56:19,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-12-19 17:56:19,350 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 17:56:19,355 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 17:56:19,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-19 17:56:19,356 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 17:56:19,356 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 17:56:19,356 INFO L85 PathProgramCache]: Analyzing trace with hash -1313350375, now seen corresponding path program 1 times [2023-12-19 17:56:19,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 17:56:19,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985833464] [2023-12-19 17:56:19,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 17:56:19,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 17:56:19,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:56:19,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-19 17:56:19,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:56:19,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-12-19 17:56:19,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:56:19,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-12-19 17:56:19,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:56:19,440 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-19 17:56:19,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 17:56:19,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985833464] [2023-12-19 17:56:19,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985833464] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 17:56:19,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 17:56:19,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-19 17:56:19,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757539989] [2023-12-19 17:56:19,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 17:56:19,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-19 17:56:19,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 17:56:19,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-19 17:56:19,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-19 17:56:19,441 INFO L87 Difference]: Start difference. First operand 58 states and 71 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-19 17:56:19,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 17:56:19,511 INFO L93 Difference]: Finished difference Result 68 states and 81 transitions. [2023-12-19 17:56:19,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-19 17:56:19,512 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2023-12-19 17:56:19,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 17:56:19,513 INFO L225 Difference]: With dead ends: 68 [2023-12-19 17:56:19,513 INFO L226 Difference]: Without dead ends: 66 [2023-12-19 17:56:19,513 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2023-12-19 17:56:19,514 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 29 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-19 17:56:19,514 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 132 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 17:56:19,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2023-12-19 17:56:19,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 62. [2023-12-19 17:56:19,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 38 states have (on average 1.131578947368421) internal successors, (43), 41 states have internal predecessors, (43), 16 states have call successors, (16), 7 states have call predecessors, (16), 7 states have return successors, (15), 13 states have call predecessors, (15), 15 states have call successors, (15) [2023-12-19 17:56:19,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 74 transitions. [2023-12-19 17:56:19,521 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 74 transitions. Word has length 27 [2023-12-19 17:56:19,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 17:56:19,522 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 74 transitions. [2023-12-19 17:56:19,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-19 17:56:19,522 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 74 transitions. [2023-12-19 17:56:19,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-12-19 17:56:19,523 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 17:56:19,523 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 17:56:19,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-12-19 17:56:19,523 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 17:56:19,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 17:56:19,523 INFO L85 PathProgramCache]: Analyzing trace with hash 1160009689, now seen corresponding path program 1 times [2023-12-19 17:56:19,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 17:56:19,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891793662] [2023-12-19 17:56:19,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 17:56:19,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 17:56:19,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:56:19,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-19 17:56:19,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:56:19,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-12-19 17:56:19,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:56:19,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-12-19 17:56:19,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:56:19,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-12-19 17:56:19,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:56:19,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-12-19 17:56:19,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:56:19,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-12-19 17:56:19,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:56:19,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2023-12-19 17:56:19,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:56:19,660 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2023-12-19 17:56:19,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 17:56:19,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891793662] [2023-12-19 17:56:19,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891793662] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 17:56:19,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540438758] [2023-12-19 17:56:19,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 17:56:19,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 17:56:19,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 17:56:19,670 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 17:56:19,688 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-19 17:56:19,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:56:19,732 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 19 conjunts are in the unsatisfiable core [2023-12-19 17:56:19,737 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 17:56:19,933 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 13 proven. 21 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-12-19 17:56:19,933 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 17:56:20,070 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 13 proven. 21 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-12-19 17:56:20,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540438758] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 17:56:20,070 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 17:56:20,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 19 [2023-12-19 17:56:20,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110183075] [2023-12-19 17:56:20,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 17:56:20,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-12-19 17:56:20,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 17:56:20,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-12-19 17:56:20,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2023-12-19 17:56:20,072 INFO L87 Difference]: Start difference. First operand 62 states and 74 transitions. Second operand has 19 states, 16 states have (on average 2.3125) internal successors, (37), 17 states have internal predecessors, (37), 7 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (15), 6 states have call predecessors, (15), 7 states have call successors, (15) [2023-12-19 17:56:20,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 17:56:20,331 INFO L93 Difference]: Finished difference Result 102 states and 137 transitions. [2023-12-19 17:56:20,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-12-19 17:56:20,332 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 16 states have (on average 2.3125) internal successors, (37), 17 states have internal predecessors, (37), 7 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (15), 6 states have call predecessors, (15), 7 states have call successors, (15) Word has length 50 [2023-12-19 17:56:20,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 17:56:20,334 INFO L225 Difference]: With dead ends: 102 [2023-12-19 17:56:20,334 INFO L226 Difference]: Without dead ends: 87 [2023-12-19 17:56:20,334 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 99 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=176, Invalid=636, Unknown=0, NotChecked=0, Total=812 [2023-12-19 17:56:20,335 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 57 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-19 17:56:20,335 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 150 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-19 17:56:20,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2023-12-19 17:56:20,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 82. [2023-12-19 17:56:20,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 49 states have (on average 1.1020408163265305) internal successors, (54), 52 states have internal predecessors, (54), 24 states have call successors, (24), 8 states have call predecessors, (24), 8 states have return successors, (23), 21 states have call predecessors, (23), 23 states have call successors, (23) [2023-12-19 17:56:20,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 101 transitions. [2023-12-19 17:56:20,345 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 101 transitions. Word has length 50 [2023-12-19 17:56:20,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 17:56:20,345 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 101 transitions. [2023-12-19 17:56:20,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 16 states have (on average 2.3125) internal successors, (37), 17 states have internal predecessors, (37), 7 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (15), 6 states have call predecessors, (15), 7 states have call successors, (15) [2023-12-19 17:56:20,345 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 101 transitions. [2023-12-19 17:56:20,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-12-19 17:56:20,346 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 17:56:20,346 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 17:56:20,354 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-19 17:56:20,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 17:56:20,551 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 17:56:20,552 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 17:56:20,552 INFO L85 PathProgramCache]: Analyzing trace with hash -1190365469, now seen corresponding path program 1 times [2023-12-19 17:56:20,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 17:56:20,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381145857] [2023-12-19 17:56:20,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 17:56:20,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 17:56:20,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:56:20,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-19 17:56:20,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:56:20,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-12-19 17:56:20,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:56:20,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-12-19 17:56:20,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:56:20,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-12-19 17:56:20,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:56:20,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-12-19 17:56:20,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:56:20,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-12-19 17:56:20,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:56:20,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-12-19 17:56:20,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:56:20,657 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 14 proven. 8 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2023-12-19 17:56:20,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 17:56:20,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381145857] [2023-12-19 17:56:20,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381145857] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 17:56:20,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480331166] [2023-12-19 17:56:20,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 17:56:20,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 17:56:20,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 17:56:20,670 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 17:56:20,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-19 17:56:20,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:56:20,713 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 13 conjunts are in the unsatisfiable core [2023-12-19 17:56:20,716 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 17:56:20,836 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 14 proven. 8 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2023-12-19 17:56:20,837 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 17:56:20,888 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 14 proven. 8 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2023-12-19 17:56:20,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480331166] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 17:56:20,888 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 17:56:20,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2023-12-19 17:56:20,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230592642] [2023-12-19 17:56:20,888 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 17:56:20,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-19 17:56:20,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 17:56:20,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-19 17:56:20,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2023-12-19 17:56:20,889 INFO L87 Difference]: Start difference. First operand 82 states and 101 transitions. Second operand has 14 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 7 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2023-12-19 17:56:20,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 17:56:20,967 INFO L93 Difference]: Finished difference Result 88 states and 106 transitions. [2023-12-19 17:56:20,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-19 17:56:20,967 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 7 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) Word has length 51 [2023-12-19 17:56:20,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 17:56:20,968 INFO L225 Difference]: With dead ends: 88 [2023-12-19 17:56:20,968 INFO L226 Difference]: Without dead ends: 86 [2023-12-19 17:56:20,968 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 106 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2023-12-19 17:56:20,969 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 32 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-19 17:56:20,969 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 193 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 17:56:20,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2023-12-19 17:56:20,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2023-12-19 17:56:20,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 52 states have (on average 1.0961538461538463) internal successors, (57), 55 states have internal predecessors, (57), 24 states have call successors, (24), 9 states have call predecessors, (24), 9 states have return successors, (23), 21 states have call predecessors, (23), 23 states have call successors, (23) [2023-12-19 17:56:20,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 104 transitions. [2023-12-19 17:56:20,977 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 104 transitions. Word has length 51 [2023-12-19 17:56:20,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 17:56:20,977 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 104 transitions. [2023-12-19 17:56:20,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 7 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2023-12-19 17:56:20,977 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 104 transitions. [2023-12-19 17:56:20,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-12-19 17:56:20,978 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 17:56:20,979 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2023-12-19 17:56:20,997 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-19 17:56:21,183 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,SelfDestructingSolverStorable7 [2023-12-19 17:56:21,184 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 17:56:21,184 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 17:56:21,184 INFO L85 PathProgramCache]: Analyzing trace with hash 813879981, now seen corresponding path program 2 times [2023-12-19 17:56:21,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 17:56:21,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146839994] [2023-12-19 17:56:21,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 17:56:21,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 17:56:21,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:56:21,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-19 17:56:21,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:56:21,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-12-19 17:56:21,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:56:21,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-12-19 17:56:21,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:56:21,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-12-19 17:56:21,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:56:21,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-12-19 17:56:21,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:56:21,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-12-19 17:56:21,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:56:21,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-12-19 17:56:21,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:56:21,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2023-12-19 17:56:21,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:56:21,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2023-12-19 17:56:21,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:56:21,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2023-12-19 17:56:21,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:56:21,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2023-12-19 17:56:21,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:56:21,369 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 48 proven. 28 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2023-12-19 17:56:21,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 17:56:21,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146839994] [2023-12-19 17:56:21,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146839994] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 17:56:21,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764576419] [2023-12-19 17:56:21,369 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-19 17:56:21,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 17:56:21,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 17:56:21,370 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 17:56:21,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-19 17:56:21,427 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-19 17:56:21,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 17:56:21,428 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 25 conjunts are in the unsatisfiable core [2023-12-19 17:56:21,430 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 17:56:21,646 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 21 proven. 55 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2023-12-19 17:56:21,647 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 17:56:21,822 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 21 proven. 55 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2023-12-19 17:56:21,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764576419] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 17:56:21,822 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 17:56:21,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 12] total 24 [2023-12-19 17:56:21,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774784641] [2023-12-19 17:56:21,823 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 17:56:21,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-12-19 17:56:21,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 17:56:21,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-12-19 17:56:21,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2023-12-19 17:56:21,824 INFO L87 Difference]: Start difference. First operand 86 states and 104 transitions. Second operand has 24 states, 20 states have (on average 2.8) internal successors, (56), 21 states have internal predecessors, (56), 13 states have call successors, (34), 3 states have call predecessors, (34), 2 states have return successors, (32), 11 states have call predecessors, (32), 13 states have call successors, (32) [2023-12-19 17:56:22,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 17:56:22,195 INFO L93 Difference]: Finished difference Result 102 states and 124 transitions. [2023-12-19 17:56:22,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-12-19 17:56:22,195 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 20 states have (on average 2.8) internal successors, (56), 21 states have internal predecessors, (56), 13 states have call successors, (34), 3 states have call predecessors, (34), 2 states have return successors, (32), 11 states have call predecessors, (32), 13 states have call successors, (32) Word has length 75 [2023-12-19 17:56:22,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 17:56:22,196 INFO L225 Difference]: With dead ends: 102 [2023-12-19 17:56:22,196 INFO L226 Difference]: Without dead ends: 100 [2023-12-19 17:56:22,197 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 155 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=261, Invalid=1145, Unknown=0, NotChecked=0, Total=1406 [2023-12-19 17:56:22,197 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 68 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-19 17:56:22,198 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 233 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-19 17:56:22,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2023-12-19 17:56:22,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 90. [2023-12-19 17:56:22,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 55 states have (on average 1.0909090909090908) internal successors, (60), 58 states have internal predecessors, (60), 24 states have call successors, (24), 10 states have call predecessors, (24), 10 states have return successors, (23), 21 states have call predecessors, (23), 23 states have call successors, (23) [2023-12-19 17:56:22,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 107 transitions. [2023-12-19 17:56:22,210 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 107 transitions. Word has length 75 [2023-12-19 17:56:22,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 17:56:22,210 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 107 transitions. [2023-12-19 17:56:22,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 20 states have (on average 2.8) internal successors, (56), 21 states have internal predecessors, (56), 13 states have call successors, (34), 3 states have call predecessors, (34), 2 states have return successors, (32), 11 states have call predecessors, (32), 13 states have call successors, (32) [2023-12-19 17:56:22,210 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 107 transitions. [2023-12-19 17:56:22,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2023-12-19 17:56:22,211 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 17:56:22,211 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 17:56:22,218 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-19 17:56:22,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 17:56:22,416 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 17:56:22,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 17:56:22,417 INFO L85 PathProgramCache]: Analyzing trace with hash -239313979, now seen corresponding path program 2 times [2023-12-19 17:56:22,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 17:56:22,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310633979] [2023-12-19 17:56:22,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 17:56:22,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 17:56:22,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:56:22,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-19 17:56:22,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:56:22,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-12-19 17:56:22,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:56:22,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-12-19 17:56:22,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:56:22,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-12-19 17:56:22,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:56:22,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-12-19 17:56:22,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:56:22,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-12-19 17:56:22,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:56:22,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-12-19 17:56:22,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:56:22,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2023-12-19 17:56:22,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:56:22,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2023-12-19 17:56:22,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:56:22,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2023-12-19 17:56:22,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:56:22,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2023-12-19 17:56:22,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:56:22,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2023-12-19 17:56:22,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:56:22,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2023-12-19 17:56:22,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:56:22,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2023-12-19 17:56:22,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:56:22,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2023-12-19 17:56:22,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:56:22,705 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 56 proven. 46 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2023-12-19 17:56:22,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 17:56:22,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310633979] [2023-12-19 17:56:22,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310633979] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 17:56:22,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867940977] [2023-12-19 17:56:22,705 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-19 17:56:22,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 17:56:22,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 17:56:22,720 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 17:56:22,760 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-19 17:56:22,808 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-19 17:56:22,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 17:56:22,809 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 23 conjunts are in the unsatisfiable core [2023-12-19 17:56:22,817 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 17:56:22,910 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 64 proven. 67 refuted. 0 times theorem prover too weak. 349 trivial. 0 not checked. [2023-12-19 17:56:22,910 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 17:56:23,031 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 71 proven. 60 refuted. 0 times theorem prover too weak. 349 trivial. 0 not checked. [2023-12-19 17:56:23,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867940977] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 17:56:23,032 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 17:56:23,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 11] total 20 [2023-12-19 17:56:23,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52984880] [2023-12-19 17:56:23,032 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 17:56:23,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-12-19 17:56:23,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 17:56:23,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-12-19 17:56:23,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2023-12-19 17:56:23,034 INFO L87 Difference]: Start difference. First operand 90 states and 107 transitions. Second operand has 20 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 11 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (25), 10 states have call predecessors, (25), 11 states have call successors, (25) [2023-12-19 17:56:23,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 17:56:23,238 INFO L93 Difference]: Finished difference Result 90 states and 107 transitions. [2023-12-19 17:56:23,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-19 17:56:23,238 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 11 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (25), 10 states have call predecessors, (25), 11 states have call successors, (25) Word has length 98 [2023-12-19 17:56:23,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 17:56:23,240 INFO L225 Difference]: With dead ends: 90 [2023-12-19 17:56:23,240 INFO L226 Difference]: Without dead ends: 0 [2023-12-19 17:56:23,242 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 216 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=152, Invalid=660, Unknown=0, NotChecked=0, Total=812 [2023-12-19 17:56:23,243 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 26 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-19 17:56:23,243 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 247 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-19 17:56:23,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-12-19 17:56:23,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-12-19 17:56:23,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:56:23,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-12-19 17:56:23,244 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 98 [2023-12-19 17:56:23,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 17:56:23,244 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-12-19 17:56:23,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 11 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (25), 10 states have call predecessors, (25), 11 states have call successors, (25) [2023-12-19 17:56:23,244 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-12-19 17:56:23,244 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-12-19 17:56:23,246 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-19 17:56:23,264 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-19 17:56:23,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 17:56:23,454 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2023-12-19 17:56:23,964 INFO L899 garLoopResultBuilder]: For program point L31(line 31) no Hoare annotation was computed. [2023-12-19 17:56:23,964 INFO L899 garLoopResultBuilder]: For program point L31-1(lines 25 56) no Hoare annotation was computed. [2023-12-19 17:56:23,965 INFO L895 garLoopResultBuilder]: At program point L52(line 52) the Hoare annotation is: (and (<= 2 |ULTIMATE.start_main_~bufferlen~0#1|) (let ((.cse0 (<= 0 |ULTIMATE.start_main_~buf~0#1|))) (or (and (<= 1 |ULTIMATE.start_main_~in~0#1|) .cse0) (and .cse0 (= |ULTIMATE.start_main_~in~0#1| 0)))) (<= (+ |ULTIMATE.start_main_~buf~0#1| 1) |ULTIMATE.start_main_~bufferlen~0#1|)) [2023-12-19 17:56:23,965 INFO L895 garLoopResultBuilder]: At program point L52-1(line 52) the Hoare annotation is: (and (<= 2 |ULTIMATE.start_main_~bufferlen~0#1|) (let ((.cse0 (<= 0 |ULTIMATE.start_main_~buf~0#1|))) (or (and (<= 1 |ULTIMATE.start_main_~in~0#1|) .cse0) (and .cse0 (= |ULTIMATE.start_main_~in~0#1| 0)))) (<= (+ |ULTIMATE.start_main_~buf~0#1| 1) |ULTIMATE.start_main_~bufferlen~0#1|)) [2023-12-19 17:56:23,965 INFO L899 garLoopResultBuilder]: For program point L32(lines 25 56) no Hoare annotation was computed. [2023-12-19 17:56:23,965 INFO L899 garLoopResultBuilder]: For program point L53(line 53) no Hoare annotation was computed. [2023-12-19 17:56:23,965 INFO L895 garLoopResultBuilder]: At program point L49(line 49) the Hoare annotation is: (let ((.cse0 (<= 1 |ULTIMATE.start_main_~in~0#1|)) (.cse1 (<= 0 |ULTIMATE.start_main_~buf~0#1|))) (or (and .cse0 (<= (+ |ULTIMATE.start_main_~buf~0#1| 2) |ULTIMATE.start_main_~bufferlen~0#1|) (<= |ULTIMATE.start_main_~buf~0#1| 2) .cse1 (<= 3 |ULTIMATE.start_main_~bufferlen~0#1|)) (and (<= (+ |ULTIMATE.start_main_~bufferlen~0#1| |ULTIMATE.start_main_~in~0#1| 1) (+ |ULTIMATE.start_main_~buf~0#1| |ULTIMATE.start_main_~inlen~0#1|)) (= |ULTIMATE.start_main_~bufferlen~0#1| (+ 2 |ULTIMATE.start_main_~buflim~0#1|)) .cse0 (<= |ULTIMATE.start_main_~buf~0#1| |ULTIMATE.start_main_~buflim~0#1|) .cse1) (and (<= 2 |ULTIMATE.start_main_~bufferlen~0#1|) (= |ULTIMATE.start_main_~buf~0#1| 0) (= |ULTIMATE.start_main_~in~0#1| 0)))) [2023-12-19 17:56:23,965 INFO L895 garLoopResultBuilder]: At program point L41(line 41) the Hoare annotation is: (let ((.cse0 (= |ULTIMATE.start_main_~bufferlen~0#1| (+ 2 |ULTIMATE.start_main_~buflim~0#1|)))) (or (and (= |ULTIMATE.start_main_~buf~0#1| 0) .cse0 (<= (+ 3 |ULTIMATE.start_main_~buflim~0#1|) |ULTIMATE.start_main_~inlen~0#1|) (= |ULTIMATE.start_main_~in~0#1| 0) (<= 3 |ULTIMATE.start_main_~bufferlen~0#1|)) (and (<= (+ |ULTIMATE.start_main_~bufferlen~0#1| |ULTIMATE.start_main_~in~0#1| 1) (+ |ULTIMATE.start_main_~buf~0#1| |ULTIMATE.start_main_~inlen~0#1|)) .cse0 (<= 1 |ULTIMATE.start_main_~in~0#1|) (<= |ULTIMATE.start_main_~buf~0#1| |ULTIMATE.start_main_~buflim~0#1|) (<= 0 |ULTIMATE.start_main_~buf~0#1|) (not (= |ULTIMATE.start_main_~buf~0#1| |ULTIMATE.start_main_~buflim~0#1|))))) [2023-12-19 17:56:23,966 INFO L895 garLoopResultBuilder]: At program point L41-1(line 41) the Hoare annotation is: (let ((.cse0 (= |ULTIMATE.start_main_~bufferlen~0#1| (+ 2 |ULTIMATE.start_main_~buflim~0#1|)))) (or (and (= |ULTIMATE.start_main_~buf~0#1| 0) .cse0 (<= (+ 3 |ULTIMATE.start_main_~buflim~0#1|) |ULTIMATE.start_main_~inlen~0#1|) (= |ULTIMATE.start_main_~in~0#1| 0) (<= 3 |ULTIMATE.start_main_~bufferlen~0#1|)) (and (<= (+ |ULTIMATE.start_main_~bufferlen~0#1| |ULTIMATE.start_main_~in~0#1| 1) (+ |ULTIMATE.start_main_~buf~0#1| |ULTIMATE.start_main_~inlen~0#1|)) .cse0 (<= 1 |ULTIMATE.start_main_~in~0#1|) (<= |ULTIMATE.start_main_~buf~0#1| |ULTIMATE.start_main_~buflim~0#1|) (<= 0 |ULTIMATE.start_main_~buf~0#1|) (not (= |ULTIMATE.start_main_~buf~0#1| |ULTIMATE.start_main_~buflim~0#1|))))) [2023-12-19 17:56:23,966 INFO L899 garLoopResultBuilder]: For program point L37-1(lines 37 48) no Hoare annotation was computed. [2023-12-19 17:56:23,966 INFO L895 garLoopResultBuilder]: At program point L37-3(lines 37 48) the Hoare annotation is: (let ((.cse0 (<= 1 |ULTIMATE.start_main_~in~0#1|)) (.cse1 (<= 0 |ULTIMATE.start_main_~buf~0#1|))) (or (and .cse0 (<= (+ |ULTIMATE.start_main_~buf~0#1| 2) |ULTIMATE.start_main_~bufferlen~0#1|) (<= |ULTIMATE.start_main_~buf~0#1| 2) .cse1 (<= 3 |ULTIMATE.start_main_~bufferlen~0#1|)) (and (<= (+ |ULTIMATE.start_main_~bufferlen~0#1| |ULTIMATE.start_main_~in~0#1| 1) (+ |ULTIMATE.start_main_~buf~0#1| |ULTIMATE.start_main_~inlen~0#1|)) (= |ULTIMATE.start_main_~bufferlen~0#1| (+ 2 |ULTIMATE.start_main_~buflim~0#1|)) .cse0 (<= |ULTIMATE.start_main_~buf~0#1| |ULTIMATE.start_main_~buflim~0#1|) .cse1) (and (<= 2 |ULTIMATE.start_main_~bufferlen~0#1|) (= |ULTIMATE.start_main_~buf~0#1| 0) (= |ULTIMATE.start_main_~in~0#1| 0)))) [2023-12-19 17:56:23,966 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2023-12-19 17:56:23,966 INFO L899 garLoopResultBuilder]: For program point L50(line 50) no Hoare annotation was computed. [2023-12-19 17:56:23,966 INFO L895 garLoopResultBuilder]: At program point L46(line 46) the Hoare annotation is: (and (<= (+ |ULTIMATE.start_main_~bufferlen~0#1| |ULTIMATE.start_main_~in~0#1| 1) (+ |ULTIMATE.start_main_~buf~0#1| |ULTIMATE.start_main_~inlen~0#1|)) (= |ULTIMATE.start_main_~bufferlen~0#1| (+ 2 |ULTIMATE.start_main_~buflim~0#1|)) (<= 1 |ULTIMATE.start_main_~in~0#1|) (<= |ULTIMATE.start_main_~buf~0#1| |ULTIMATE.start_main_~buflim~0#1|) (<= 0 |ULTIMATE.start_main_~buf~0#1|)) [2023-12-19 17:56:23,966 INFO L895 garLoopResultBuilder]: At program point L46-1(line 46) the Hoare annotation is: (and (<= (+ |ULTIMATE.start_main_~bufferlen~0#1| |ULTIMATE.start_main_~in~0#1| 1) (+ |ULTIMATE.start_main_~buf~0#1| |ULTIMATE.start_main_~inlen~0#1|)) (= |ULTIMATE.start_main_~bufferlen~0#1| (+ 2 |ULTIMATE.start_main_~buflim~0#1|)) (<= 1 |ULTIMATE.start_main_~in~0#1|) (<= |ULTIMATE.start_main_~buf~0#1| |ULTIMATE.start_main_~buflim~0#1|) (<= 0 |ULTIMATE.start_main_~buf~0#1|)) [2023-12-19 17:56:23,966 INFO L899 garLoopResultBuilder]: For program point L42(line 42) no Hoare annotation was computed. [2023-12-19 17:56:23,966 INFO L899 garLoopResultBuilder]: For program point $Ultimate##0(line -1) no Hoare annotation was computed. [2023-12-19 17:56:23,966 INFO L899 garLoopResultBuilder]: For program point L55(lines 25 56) no Hoare annotation was computed. [2023-12-19 17:56:23,966 INFO L895 garLoopResultBuilder]: At program point L47(lines 37 48) the Hoare annotation is: (let ((.cse0 (= |ULTIMATE.start_main_~bufferlen~0#1| (+ 2 |ULTIMATE.start_main_~buflim~0#1|)))) (or (and (= |ULTIMATE.start_main_~buf~0#1| 0) .cse0 (<= 0 |ULTIMATE.start_main_~buflim~0#1|) (<= (+ 3 |ULTIMATE.start_main_~buflim~0#1|) |ULTIMATE.start_main_~inlen~0#1|) (= |ULTIMATE.start_main_~in~0#1| 0)) (and (<= (+ |ULTIMATE.start_main_~bufferlen~0#1| |ULTIMATE.start_main_~in~0#1| 1) (+ |ULTIMATE.start_main_~buf~0#1| |ULTIMATE.start_main_~inlen~0#1|)) .cse0 (<= 1 |ULTIMATE.start_main_~in~0#1|) (<= |ULTIMATE.start_main_~buf~0#1| |ULTIMATE.start_main_~buflim~0#1|) (<= 0 |ULTIMATE.start_main_~buf~0#1|)))) [2023-12-19 17:56:23,966 INFO L899 garLoopResultBuilder]: For program point L39(lines 39 40) no Hoare annotation was computed. [2023-12-19 17:56:23,967 INFO L899 garLoopResultBuilder]: For program point L18-2(lines 17 22) no Hoare annotation was computed. [2023-12-19 17:56:23,967 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 17 22) no Hoare annotation was computed. [2023-12-19 17:56:23,967 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 17 22) the Hoare annotation is: true [2023-12-19 17:56:23,967 INFO L899 garLoopResultBuilder]: For program point L19(line 19) no Hoare annotation was computed. [2023-12-19 17:56:23,967 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 19) no Hoare annotation was computed. [2023-12-19 17:56:23,967 INFO L899 garLoopResultBuilder]: For program point L18(lines 18 20) no Hoare annotation was computed. [2023-12-19 17:56:23,969 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1, 1, 1] [2023-12-19 17:56:23,970 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-12-19 17:56:23,977 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.12 05:56:23 BoogieIcfgContainer [2023-12-19 17:56:23,977 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-19 17:56:23,977 INFO L158 Benchmark]: Toolchain (without parser) took 6272.00ms. Allocated memory was 292.6MB in the beginning and 367.0MB in the end (delta: 74.4MB). Free memory was 237.3MB in the beginning and 249.5MB in the end (delta: -12.2MB). Peak memory consumption was 195.9MB. Max. memory is 8.0GB. [2023-12-19 17:56:23,977 INFO L158 Benchmark]: CDTParser took 0.44ms. Allocated memory is still 204.5MB. Free memory is still 155.6MB. There was no memory consumed. Max. memory is 8.0GB. [2023-12-19 17:56:23,977 INFO L158 Benchmark]: CACSL2BoogieTranslator took 142.56ms. Allocated memory is still 292.6MB. Free memory was 237.0MB in the beginning and 226.1MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2023-12-19 17:56:23,978 INFO L158 Benchmark]: Boogie Procedure Inliner took 19.70ms. Allocated memory is still 292.6MB. Free memory was 226.1MB in the beginning and 224.4MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-19 17:56:23,978 INFO L158 Benchmark]: Boogie Preprocessor took 20.32ms. Allocated memory is still 292.6MB. Free memory was 224.4MB in the beginning and 223.0MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-12-19 17:56:23,978 INFO L158 Benchmark]: RCFGBuilder took 240.25ms. Allocated memory is still 292.6MB. Free memory was 223.0MB in the beginning and 211.4MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-12-19 17:56:23,978 INFO L158 Benchmark]: TraceAbstraction took 5845.06ms. Allocated memory was 292.6MB in the beginning and 367.0MB in the end (delta: 74.4MB). Free memory was 210.7MB in the beginning and 249.5MB in the end (delta: -38.8MB). Peak memory consumption was 168.7MB. Max. memory is 8.0GB. [2023-12-19 17:56:23,979 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.44ms. Allocated memory is still 204.5MB. Free memory is still 155.6MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 142.56ms. Allocated memory is still 292.6MB. Free memory was 237.0MB in the beginning and 226.1MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 19.70ms. Allocated memory is still 292.6MB. Free memory was 226.1MB in the beginning and 224.4MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 20.32ms. Allocated memory is still 292.6MB. Free memory was 224.4MB in the beginning and 223.0MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 240.25ms. Allocated memory is still 292.6MB. Free memory was 223.0MB in the beginning and 211.4MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * TraceAbstraction took 5845.06ms. Allocated memory was 292.6MB in the beginning and 367.0MB in the end (delta: 74.4MB). Free memory was 210.7MB in the beginning and 249.5MB in the end (delta: -38.8MB). Peak memory consumption was 168.7MB. 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: 19]: 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, 26 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 5.8s, OverallIterations: 10, TraceHistogramMax: 16, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 1.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.5s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 343 SdHoareTripleChecker+Valid, 0.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 289 mSDsluCounter, 1388 SdHoareTripleChecker+Invalid, 0.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1132 mSDsCounter, 272 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1018 IncrementalHoareTripleChecker+Invalid, 1290 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 272 mSolverCounterUnsat, 256 mSDtfsCounter, 1018 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 757 GetRequests, 606 SyntacticMatches, 15 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 774 ImplicationChecksByTransitivity, 1.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=90occurred in iteration=9, InterpolantAutomatonStates: 97, 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, 10 MinimizatonAttempts, 27 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 10 LocationsWithAnnotation, 55 PreInvPairs, 98 NumberOfFragments, 339 HoareAnnotationTreeSize, 55 FormulaSimplifications, 946 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 10 FormulaSimplificationsInter, 1434 FormulaSimplificationTreeSizeReductionInter, 0.4s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.3s InterpolantComputationTime, 657 NumberOfCodeBlocks, 657 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 913 ConstructedInterpolants, 0 QuantifiedInterpolants, 2965 SizeOfPredicates, 23 NumberOfNonLiveVariables, 618 ConjunctsInSsa, 80 ConjunctsInUnsatCore, 18 InterpolantComputations, 6 PerfectInterpolantSequences, 2523/2902 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 - InvariantResult [Line: 37]: Loop Invariant Derived loop invariant: ((((((buf == 0) && (bufferlen == (2 + buflim))) && (0 <= buflim)) && ((3 + buflim) <= inlen)) && (in == 0)) || (((((((bufferlen + in) + 1) <= (buf + inlen)) && (bufferlen == (2 + buflim))) && (1 <= in)) && (buf <= buflim)) && (0 <= buf))) RESULT: Ultimate proved your program to be correct! [2023-12-19 17:56:24,008 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...