/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.use.bitabs.translation true -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/recursive-simple/id_i25_o25-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-19 23:56:33,950 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-19 23:56:33,989 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-12-19 23:56:33,992 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-19 23:56:33,992 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-19 23:56:34,006 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-19 23:56:34,007 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-19 23:56:34,007 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-19 23:56:34,007 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-19 23:56:34,008 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-19 23:56:34,008 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-19 23:56:34,008 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-19 23:56:34,008 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-19 23:56:34,009 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-19 23:56:34,009 INFO L153 SettingsManager]: * Use SBE=true [2023-12-19 23:56:34,009 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-19 23:56:34,009 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-19 23:56:34,009 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-19 23:56:34,010 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-19 23:56:34,010 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-19 23:56:34,010 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-19 23:56:34,010 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-19 23:56:34,011 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-19 23:56:34,011 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-19 23:56:34,011 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-19 23:56:34,011 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-19 23:56:34,011 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-19 23:56:34,011 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-19 23:56:34,012 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-19 23:56:34,012 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-19 23:56:34,012 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-19 23:56:34,012 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-19 23:56:34,012 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-19 23:56:34,013 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-19 23:56:34,013 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-19 23:56:34,013 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-19 23:56:34,013 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-19 23:56:34,013 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-19 23:56:34,013 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-19 23:56:34,013 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-19 23:56:34,013 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-19 23:56:34,016 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-19 23:56:34,016 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-19 23:56:34,016 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> true [2023-12-19 23:56:34,190 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-19 23:56:34,205 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-19 23:56:34,206 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-19 23:56:34,207 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-19 23:56:34,207 INFO L274 PluginConnector]: CDTParser initialized [2023-12-19 23:56:34,208 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_i25_o25-1.c [2023-12-19 23:56:35,278 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-19 23:56:35,442 INFO L384 CDTParser]: Found 1 translation units. [2023-12-19 23:56:35,443 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id_i25_o25-1.c [2023-12-19 23:56:35,448 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a1ff89405/cd09c508002a4e6ab2fa2972ac183361/FLAG399322ff2 [2023-12-19 23:56:35,465 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a1ff89405/cd09c508002a4e6ab2fa2972ac183361 [2023-12-19 23:56:35,468 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-19 23:56:35,470 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-19 23:56:35,472 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-19 23:56:35,472 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-19 23:56:35,475 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-19 23:56:35,476 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.12 11:56:35" (1/1) ... [2023-12-19 23:56:35,476 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5fdf4155 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 11:56:35, skipping insertion in model container [2023-12-19 23:56:35,476 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.12 11:56:35" (1/1) ... [2023-12-19 23:56:35,491 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-19 23:56:35,598 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id_i25_o25-1.c[454,467] [2023-12-19 23:56:35,601 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-19 23:56:35,608 INFO L202 MainTranslator]: Completed pre-run [2023-12-19 23:56:35,617 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id_i25_o25-1.c[454,467] [2023-12-19 23:56:35,617 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-19 23:56:35,626 INFO L206 MainTranslator]: Completed translation [2023-12-19 23:56:35,626 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 11:56:35 WrapperNode [2023-12-19 23:56:35,626 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-19 23:56:35,627 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-19 23:56:35,627 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-19 23:56:35,627 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-19 23:56:35,632 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 11:56:35" (1/1) ... [2023-12-19 23:56:35,636 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 11:56:35" (1/1) ... [2023-12-19 23:56:35,646 INFO L138 Inliner]: procedures = 13, calls = 9, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 18 [2023-12-19 23:56:35,646 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-19 23:56:35,647 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-19 23:56:35,647 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-19 23:56:35,647 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-19 23:56:35,654 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 11:56:35" (1/1) ... [2023-12-19 23:56:35,654 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 11:56:35" (1/1) ... [2023-12-19 23:56:35,655 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 11:56:35" (1/1) ... [2023-12-19 23:56:35,661 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2023-12-19 23:56:35,661 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 11:56:35" (1/1) ... [2023-12-19 23:56:35,662 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 11:56:35" (1/1) ... [2023-12-19 23:56:35,663 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 11:56:35" (1/1) ... [2023-12-19 23:56:35,664 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 11:56:35" (1/1) ... [2023-12-19 23:56:35,665 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 11:56:35" (1/1) ... [2023-12-19 23:56:35,666 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 11:56:35" (1/1) ... [2023-12-19 23:56:35,671 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-19 23:56:35,673 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-19 23:56:35,673 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-19 23:56:35,673 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-19 23:56:35,673 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 11:56:35" (1/1) ... [2023-12-19 23:56:35,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-19 23:56:35,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 23:56:35,705 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-12-19 23:56:35,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-12-19 23:56:35,728 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-19 23:56:35,728 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-19 23:56:35,729 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-19 23:56:35,729 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-19 23:56:35,729 INFO L130 BoogieDeclarations]: Found specification of procedure id [2023-12-19 23:56:35,729 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2023-12-19 23:56:35,767 INFO L241 CfgBuilder]: Building ICFG [2023-12-19 23:56:35,769 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-19 23:56:35,866 INFO L282 CfgBuilder]: Performing block encoding [2023-12-19 23:56:35,879 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-19 23:56:35,879 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-12-19 23:56:35,879 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.12 11:56:35 BoogieIcfgContainer [2023-12-19 23:56:35,879 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-19 23:56:35,881 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-19 23:56:35,881 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-19 23:56:35,883 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-19 23:56:35,883 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.12 11:56:35" (1/3) ... [2023-12-19 23:56:35,883 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c416164 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.12 11:56:35, skipping insertion in model container [2023-12-19 23:56:35,884 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 11:56:35" (2/3) ... [2023-12-19 23:56:35,884 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c416164 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.12 11:56:35, skipping insertion in model container [2023-12-19 23:56:35,884 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.12 11:56:35" (3/3) ... [2023-12-19 23:56:35,885 INFO L112 eAbstractionObserver]: Analyzing ICFG id_i25_o25-1.c [2023-12-19 23:56:35,896 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-19 23:56:35,896 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-19 23:56:35,925 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-19 23:56:35,930 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;@3977cc24, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-19 23:56:35,930 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-19 23:56:35,933 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-19 23:56:35,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-12-19 23:56:35,940 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 23:56:35,940 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 23:56:35,941 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 23:56:35,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 23:56:35,946 INFO L85 PathProgramCache]: Analyzing trace with hash 1493244868, now seen corresponding path program 1 times [2023-12-19 23:56:35,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 23:56:35,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794885095] [2023-12-19 23:56:35,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 23:56:35,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 23:56:36,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:36,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-19 23:56:36,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:36,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 23:56:36,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 23:56:36,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794885095] [2023-12-19 23:56:36,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794885095] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 23:56:36,208 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 23:56:36,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-19 23:56:36,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899304682] [2023-12-19 23:56:36,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 23:56:36,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-19 23:56:36,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 23:56:36,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-19 23:56:36,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-19 23:56:36,244 INFO L87 Difference]: Start difference. First operand has 14 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-19 23:56:36,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 23:56:36,312 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2023-12-19 23:56:36,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-19 23:56:36,314 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2023-12-19 23:56:36,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 23:56:36,319 INFO L225 Difference]: With dead ends: 22 [2023-12-19 23:56:36,319 INFO L226 Difference]: Without dead ends: 14 [2023-12-19 23:56:36,321 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-12-19 23:56:36,325 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 9 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-19 23:56:36,326 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 23 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 23:56:36,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2023-12-19 23:56:36,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2023-12-19 23:56:36,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 10 states have internal predecessors, (10), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-19 23:56:36,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2023-12-19 23:56:36,349 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 9 [2023-12-19 23:56:36,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 23:56:36,350 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2023-12-19 23:56:36,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-19 23:56:36,350 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2023-12-19 23:56:36,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-12-19 23:56:36,351 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 23:56:36,351 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 23:56:36,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-19 23:56:36,351 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 23:56:36,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 23:56:36,352 INFO L85 PathProgramCache]: Analyzing trace with hash -642736818, now seen corresponding path program 1 times [2023-12-19 23:56:36,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 23:56:36,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262709167] [2023-12-19 23:56:36,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 23:56:36,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 23:56:36,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:36,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-19 23:56:36,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:36,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:36,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:36,515 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-19 23:56:36,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 23:56:36,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262709167] [2023-12-19 23:56:36,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262709167] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 23:56:36,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471714244] [2023-12-19 23:56:36,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 23:56:36,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 23:56:36,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 23:56:36,519 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 23:56:36,524 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-19 23:56:36,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:36,553 INFO L262 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-19 23:56:36,557 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 23:56:36,611 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-19 23:56:36,611 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 23:56:36,757 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-19 23:56:36,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471714244] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 23:56:36,758 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 23:56:36,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 12 [2023-12-19 23:56:36,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218553774] [2023-12-19 23:56:36,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 23:56:36,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-19 23:56:36,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 23:56:36,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-19 23:56:36,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-12-19 23:56:36,760 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 12 states, 10 states have (on average 2.0) internal successors, (20), 11 states have internal predecessors, (20), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) [2023-12-19 23:56:36,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 23:56:36,804 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2023-12-19 23:56:36,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-19 23:56:36,805 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.0) internal successors, (20), 11 states have internal predecessors, (20), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) Word has length 15 [2023-12-19 23:56:36,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 23:56:36,807 INFO L225 Difference]: With dead ends: 21 [2023-12-19 23:56:36,807 INFO L226 Difference]: Without dead ends: 17 [2023-12-19 23:56:36,808 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2023-12-19 23:56:36,810 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 13 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-19 23:56:36,810 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 32 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 23:56:36,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-12-19 23:56:36,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2023-12-19 23:56:36,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 12 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-19 23:56:36,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2023-12-19 23:56:36,818 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 15 [2023-12-19 23:56:36,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 23:56:36,819 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2023-12-19 23:56:36,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.0) internal successors, (20), 11 states have internal predecessors, (20), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) [2023-12-19 23:56:36,819 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2023-12-19 23:56:36,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-12-19 23:56:36,821 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 23:56:36,821 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 23:56:36,839 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-12-19 23:56:37,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 23:56:37,027 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 23:56:37,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 23:56:37,028 INFO L85 PathProgramCache]: Analyzing trace with hash -2123675004, now seen corresponding path program 2 times [2023-12-19 23:56:37,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 23:56:37,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596168051] [2023-12-19 23:56:37,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 23:56:37,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 23:56:37,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:37,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-19 23:56:37,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:37,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:37,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:37,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:37,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:37,215 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-19 23:56:37,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 23:56:37,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596168051] [2023-12-19 23:56:37,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596168051] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 23:56:37,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12410873] [2023-12-19 23:56:37,216 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-19 23:56:37,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 23:56:37,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 23:56:37,218 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 23:56:37,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-19 23:56:37,271 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-19 23:56:37,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 23:56:37,272 INFO L262 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-19 23:56:37,305 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 23:56:37,354 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-19 23:56:37,355 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 23:56:37,622 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-19 23:56:37,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [12410873] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 23:56:37,622 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 23:56:37,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 9] total 14 [2023-12-19 23:56:37,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032678932] [2023-12-19 23:56:37,622 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 23:56:37,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-19 23:56:37,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 23:56:37,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-19 23:56:37,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-12-19 23:56:37,625 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 14 states, 12 states have (on average 2.0) internal successors, (24), 13 states have internal predecessors, (24), 6 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (8), 3 states have call predecessors, (8), 6 states have call successors, (8) [2023-12-19 23:56:37,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 23:56:37,680 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2023-12-19 23:56:37,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-19 23:56:37,680 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.0) internal successors, (24), 13 states have internal predecessors, (24), 6 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (8), 3 states have call predecessors, (8), 6 states have call successors, (8) Word has length 21 [2023-12-19 23:56:37,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 23:56:37,681 INFO L225 Difference]: With dead ends: 24 [2023-12-19 23:56:37,681 INFO L226 Difference]: Without dead ends: 20 [2023-12-19 23:56:37,682 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2023-12-19 23:56:37,684 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 13 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-19 23:56:37,685 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 36 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 23:56:37,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-12-19 23:56:37,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2023-12-19 23:56:37,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 13 states have (on average 1.0769230769230769) internal successors, (14), 14 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-19 23:56:37,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2023-12-19 23:56:37,690 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 21 [2023-12-19 23:56:37,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 23:56:37,690 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2023-12-19 23:56:37,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.0) internal successors, (24), 13 states have internal predecessors, (24), 6 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (8), 3 states have call predecessors, (8), 6 states have call successors, (8) [2023-12-19 23:56:37,690 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2023-12-19 23:56:37,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-12-19 23:56:37,691 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 23:56:37,691 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 23:56:37,696 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-19 23:56:37,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-12-19 23:56:37,896 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 23:56:37,896 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 23:56:37,897 INFO L85 PathProgramCache]: Analyzing trace with hash 54189198, now seen corresponding path program 3 times [2023-12-19 23:56:37,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 23:56:37,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372008236] [2023-12-19 23:56:37,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 23:56:37,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 23:56:37,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:37,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-19 23:56:37,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:38,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:38,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:38,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:38,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:38,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:38,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:38,123 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-19 23:56:38,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 23:56:38,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372008236] [2023-12-19 23:56:38,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372008236] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 23:56:38,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533512108] [2023-12-19 23:56:38,124 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-19 23:56:38,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 23:56:38,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 23:56:38,127 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 23:56:38,174 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-19 23:56:38,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-12-19 23:56:38,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 23:56:38,179 INFO L262 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-19 23:56:38,181 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 23:56:38,221 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-19 23:56:38,221 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 23:56:38,604 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-19 23:56:38,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533512108] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 23:56:38,604 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 23:56:38,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 11] total 16 [2023-12-19 23:56:38,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935061763] [2023-12-19 23:56:38,605 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 23:56:38,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-12-19 23:56:38,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 23:56:38,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-12-19 23:56:38,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2023-12-19 23:56:38,607 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 16 states, 14 states have (on average 2.0) internal successors, (28), 15 states have internal predecessors, (28), 7 states have call successors, (7), 1 states have call predecessors, (7), 5 states have return successors, (11), 4 states have call predecessors, (11), 7 states have call successors, (11) [2023-12-19 23:56:38,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 23:56:38,665 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2023-12-19 23:56:38,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-19 23:56:38,665 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.0) internal successors, (28), 15 states have internal predecessors, (28), 7 states have call successors, (7), 1 states have call predecessors, (7), 5 states have return successors, (11), 4 states have call predecessors, (11), 7 states have call successors, (11) Word has length 27 [2023-12-19 23:56:38,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 23:56:38,666 INFO L225 Difference]: With dead ends: 27 [2023-12-19 23:56:38,666 INFO L226 Difference]: Without dead ends: 23 [2023-12-19 23:56:38,667 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 48 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2023-12-19 23:56:38,668 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 29 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-19 23:56:38,670 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 41 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 23:56:38,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-12-19 23:56:38,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2023-12-19 23:56:38,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 16 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (6), 5 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-19 23:56:38,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2023-12-19 23:56:38,677 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 27 [2023-12-19 23:56:38,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 23:56:38,677 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2023-12-19 23:56:38,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.0) internal successors, (28), 15 states have internal predecessors, (28), 7 states have call successors, (7), 1 states have call predecessors, (7), 5 states have return successors, (11), 4 states have call predecessors, (11), 7 states have call successors, (11) [2023-12-19 23:56:38,677 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2023-12-19 23:56:38,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-12-19 23:56:38,679 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 23:56:38,679 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 23:56:38,684 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-19 23:56:38,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 23:56:38,885 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 23:56:38,885 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 23:56:38,885 INFO L85 PathProgramCache]: Analyzing trace with hash -1269749436, now seen corresponding path program 4 times [2023-12-19 23:56:38,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 23:56:38,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104951936] [2023-12-19 23:56:38,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 23:56:38,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 23:56:38,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:38,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-19 23:56:38,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:38,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:38,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:39,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:39,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:39,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:39,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:39,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:39,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:39,084 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-19 23:56:39,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 23:56:39,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104951936] [2023-12-19 23:56:39,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104951936] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 23:56:39,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225228962] [2023-12-19 23:56:39,085 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-19 23:56:39,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 23:56:39,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 23:56:39,086 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 23:56:39,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-19 23:56:39,121 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-19 23:56:39,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 23:56:39,122 INFO L262 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-19 23:56:39,123 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 23:56:39,159 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-12-19 23:56:39,160 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 23:56:39,731 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-19 23:56:39,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225228962] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 23:56:39,731 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 23:56:39,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 13] total 18 [2023-12-19 23:56:39,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848103796] [2023-12-19 23:56:39,732 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 23:56:39,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-12-19 23:56:39,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 23:56:39,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-12-19 23:56:39,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2023-12-19 23:56:39,733 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand has 18 states, 16 states have (on average 2.0) internal successors, (32), 17 states have internal predecessors, (32), 8 states have call successors, (8), 1 states have call predecessors, (8), 6 states have return successors, (14), 5 states have call predecessors, (14), 8 states have call successors, (14) [2023-12-19 23:56:39,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 23:56:39,786 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2023-12-19 23:56:39,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-19 23:56:39,786 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.0) internal successors, (32), 17 states have internal predecessors, (32), 8 states have call successors, (8), 1 states have call predecessors, (8), 6 states have return successors, (14), 5 states have call predecessors, (14), 8 states have call successors, (14) Word has length 33 [2023-12-19 23:56:39,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 23:56:39,787 INFO L225 Difference]: With dead ends: 30 [2023-12-19 23:56:39,787 INFO L226 Difference]: Without dead ends: 26 [2023-12-19 23:56:39,787 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 60 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=163, Invalid=343, Unknown=0, NotChecked=0, Total=506 [2023-12-19 23:56:39,788 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 45 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-19 23:56:39,788 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 46 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 23:56:39,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-12-19 23:56:39,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2023-12-19 23:56:39,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 17 states have (on average 1.0588235294117647) internal successors, (18), 18 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 6 states have return successors, (7), 6 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-19 23:56:39,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2023-12-19 23:56:39,791 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 33 [2023-12-19 23:56:39,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 23:56:39,791 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2023-12-19 23:56:39,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.0) internal successors, (32), 17 states have internal predecessors, (32), 8 states have call successors, (8), 1 states have call predecessors, (8), 6 states have return successors, (14), 5 states have call predecessors, (14), 8 states have call successors, (14) [2023-12-19 23:56:39,791 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2023-12-19 23:56:39,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-12-19 23:56:39,792 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 23:56:39,792 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 23:56:39,818 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-19 23:56:40,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 23:56:40,019 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 23:56:40,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 23:56:40,019 INFO L85 PathProgramCache]: Analyzing trace with hash -4035634, now seen corresponding path program 5 times [2023-12-19 23:56:40,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 23:56:40,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103711539] [2023-12-19 23:56:40,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 23:56:40,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 23:56:40,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:40,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-19 23:56:40,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:40,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:40,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:40,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:40,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:40,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:40,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:40,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:40,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:40,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:40,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:40,173 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2023-12-19 23:56:40,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 23:56:40,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103711539] [2023-12-19 23:56:40,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103711539] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 23:56:40,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617225106] [2023-12-19 23:56:40,174 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-19 23:56:40,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 23:56:40,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 23:56:40,175 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 23:56:40,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-19 23:56:40,220 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-12-19 23:56:40,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 23:56:40,221 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-19 23:56:40,222 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 23:56:40,264 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-12-19 23:56:40,265 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 23:56:41,094 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-19 23:56:41,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617225106] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 23:56:41,095 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 23:56:41,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 15] total 20 [2023-12-19 23:56:41,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991821904] [2023-12-19 23:56:41,095 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 23:56:41,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-12-19 23:56:41,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 23:56:41,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-12-19 23:56:41,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2023-12-19 23:56:41,096 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand has 20 states, 18 states have (on average 2.0) internal successors, (36), 19 states have internal predecessors, (36), 9 states have call successors, (9), 1 states have call predecessors, (9), 7 states have return successors, (17), 6 states have call predecessors, (17), 9 states have call successors, (17) [2023-12-19 23:56:41,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 23:56:41,160 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2023-12-19 23:56:41,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-19 23:56:41,160 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 2.0) internal successors, (36), 19 states have internal predecessors, (36), 9 states have call successors, (9), 1 states have call predecessors, (9), 7 states have return successors, (17), 6 states have call predecessors, (17), 9 states have call successors, (17) Word has length 39 [2023-12-19 23:56:41,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 23:56:41,161 INFO L225 Difference]: With dead ends: 33 [2023-12-19 23:56:41,161 INFO L226 Difference]: Without dead ends: 29 [2023-12-19 23:56:41,162 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 72 SyntacticMatches, 6 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=440, Unknown=0, NotChecked=0, Total=650 [2023-12-19 23:56:41,162 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 35 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-19 23:56:41,162 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 49 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 23:56:41,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-12-19 23:56:41,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2023-12-19 23:56:41,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.0526315789473684) internal successors, (20), 20 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 7 states have return successors, (8), 7 states have call predecessors, (8), 2 states have call successors, (8) [2023-12-19 23:56:41,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2023-12-19 23:56:41,165 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 39 [2023-12-19 23:56:41,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 23:56:41,165 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2023-12-19 23:56:41,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 2.0) internal successors, (36), 19 states have internal predecessors, (36), 9 states have call successors, (9), 1 states have call predecessors, (9), 7 states have return successors, (17), 6 states have call predecessors, (17), 9 states have call successors, (17) [2023-12-19 23:56:41,166 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2023-12-19 23:56:41,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-12-19 23:56:41,166 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 23:56:41,166 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 23:56:41,173 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-12-19 23:56:41,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 23:56:41,371 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 23:56:41,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 23:56:41,375 INFO L85 PathProgramCache]: Analyzing trace with hash -1047611388, now seen corresponding path program 6 times [2023-12-19 23:56:41,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 23:56:41,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414156878] [2023-12-19 23:56:41,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 23:56:41,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 23:56:41,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:41,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-19 23:56:41,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:41,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:41,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:41,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:41,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:41,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:41,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:41,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:41,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:41,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:41,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:41,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:41,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:41,602 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-12-19 23:56:41,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 23:56:41,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414156878] [2023-12-19 23:56:41,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414156878] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 23:56:41,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518795643] [2023-12-19 23:56:41,603 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-19 23:56:41,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 23:56:41,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 23:56:41,604 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 23:56:41,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-19 23:56:41,663 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-12-19 23:56:41,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 23:56:41,664 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-19 23:56:41,666 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 23:56:41,714 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-12-19 23:56:41,714 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 23:56:42,902 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-19 23:56:42,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518795643] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 23:56:42,902 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 23:56:42,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 17] total 22 [2023-12-19 23:56:42,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324983476] [2023-12-19 23:56:42,902 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 23:56:42,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-12-19 23:56:42,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 23:56:42,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-12-19 23:56:42,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=333, Unknown=0, NotChecked=0, Total=462 [2023-12-19 23:56:42,904 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 22 states, 20 states have (on average 2.0) internal successors, (40), 21 states have internal predecessors, (40), 10 states have call successors, (10), 1 states have call predecessors, (10), 8 states have return successors, (20), 7 states have call predecessors, (20), 10 states have call successors, (20) [2023-12-19 23:56:42,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 23:56:42,982 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2023-12-19 23:56:42,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-19 23:56:42,983 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 2.0) internal successors, (40), 21 states have internal predecessors, (40), 10 states have call successors, (10), 1 states have call predecessors, (10), 8 states have return successors, (20), 7 states have call predecessors, (20), 10 states have call successors, (20) Word has length 45 [2023-12-19 23:56:42,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 23:56:42,983 INFO L225 Difference]: With dead ends: 36 [2023-12-19 23:56:42,984 INFO L226 Difference]: Without dead ends: 32 [2023-12-19 23:56:42,984 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 84 SyntacticMatches, 7 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=263, Invalid=549, Unknown=0, NotChecked=0, Total=812 [2023-12-19 23:56:42,984 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 53 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-19 23:56:42,985 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 54 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 23:56:42,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-12-19 23:56:42,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2023-12-19 23:56:42,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 21 states have (on average 1.0476190476190477) internal successors, (22), 22 states have internal predecessors, (22), 2 states have call successors, (2), 1 states have call predecessors, (2), 8 states have return successors, (9), 8 states have call predecessors, (9), 2 states have call successors, (9) [2023-12-19 23:56:42,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2023-12-19 23:56:42,988 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 45 [2023-12-19 23:56:42,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 23:56:42,988 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2023-12-19 23:56:42,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 2.0) internal successors, (40), 21 states have internal predecessors, (40), 10 states have call successors, (10), 1 states have call predecessors, (10), 8 states have return successors, (20), 7 states have call predecessors, (20), 10 states have call successors, (20) [2023-12-19 23:56:42,988 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2023-12-19 23:56:42,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-12-19 23:56:42,989 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 23:56:42,989 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 23:56:42,993 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-12-19 23:56:43,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 23:56:43,195 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 23:56:43,195 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 23:56:43,195 INFO L85 PathProgramCache]: Analyzing trace with hash 1466649358, now seen corresponding path program 7 times [2023-12-19 23:56:43,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 23:56:43,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86794251] [2023-12-19 23:56:43,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 23:56:43,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 23:56:43,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:43,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-19 23:56:43,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:43,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:43,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:43,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:43,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:43,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:43,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:43,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:43,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:43,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:43,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:43,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:43,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:43,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:43,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:43,487 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-12-19 23:56:43,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 23:56:43,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86794251] [2023-12-19 23:56:43,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86794251] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 23:56:43,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127513939] [2023-12-19 23:56:43,487 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-19 23:56:43,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 23:56:43,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 23:56:43,503 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 23:56:43,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-19 23:56:43,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:43,577 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 18 conjunts are in the unsatisfiable core [2023-12-19 23:56:43,583 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 23:56:43,635 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2023-12-19 23:56:43,635 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 23:56:45,310 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-12-19 23:56:45,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127513939] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 23:56:45,311 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 23:56:45,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 19] total 24 [2023-12-19 23:56:45,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798121523] [2023-12-19 23:56:45,311 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 23:56:45,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-12-19 23:56:45,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 23:56:45,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-12-19 23:56:45,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=399, Unknown=0, NotChecked=0, Total=552 [2023-12-19 23:56:45,312 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand has 24 states, 22 states have (on average 2.0) internal successors, (44), 23 states have internal predecessors, (44), 11 states have call successors, (11), 1 states have call predecessors, (11), 9 states have return successors, (23), 8 states have call predecessors, (23), 11 states have call successors, (23) [2023-12-19 23:56:45,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 23:56:45,397 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2023-12-19 23:56:45,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-19 23:56:45,398 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 2.0) internal successors, (44), 23 states have internal predecessors, (44), 11 states have call successors, (11), 1 states have call predecessors, (11), 9 states have return successors, (23), 8 states have call predecessors, (23), 11 states have call successors, (23) Word has length 51 [2023-12-19 23:56:45,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 23:56:45,398 INFO L225 Difference]: With dead ends: 39 [2023-12-19 23:56:45,398 INFO L226 Difference]: Without dead ends: 35 [2023-12-19 23:56:45,399 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 96 SyntacticMatches, 8 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=322, Invalid=670, Unknown=0, NotChecked=0, Total=992 [2023-12-19 23:56:45,399 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 70 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-19 23:56:45,399 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 52 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 23:56:45,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-12-19 23:56:45,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2023-12-19 23:56:45,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 24 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 9 states have return successors, (10), 9 states have call predecessors, (10), 2 states have call successors, (10) [2023-12-19 23:56:45,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2023-12-19 23:56:45,402 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 51 [2023-12-19 23:56:45,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 23:56:45,403 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2023-12-19 23:56:45,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 2.0) internal successors, (44), 23 states have internal predecessors, (44), 11 states have call successors, (11), 1 states have call predecessors, (11), 9 states have return successors, (23), 8 states have call predecessors, (23), 11 states have call successors, (23) [2023-12-19 23:56:45,403 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2023-12-19 23:56:45,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-12-19 23:56:45,403 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 23:56:45,404 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 23:56:45,411 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-12-19 23:56:45,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 23:56:45,609 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 23:56:45,609 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 23:56:45,609 INFO L85 PathProgramCache]: Analyzing trace with hash 335541956, now seen corresponding path program 8 times [2023-12-19 23:56:45,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 23:56:45,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718390810] [2023-12-19 23:56:45,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 23:56:45,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 23:56:45,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:45,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-19 23:56:45,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:45,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:45,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:45,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:45,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:45,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:45,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:45,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:45,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:45,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:45,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:45,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:45,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:45,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:45,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:45,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:45,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:45,914 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2023-12-19 23:56:45,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 23:56:45,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718390810] [2023-12-19 23:56:45,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718390810] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 23:56:45,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819972805] [2023-12-19 23:56:45,915 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-19 23:56:45,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 23:56:45,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 23:56:45,916 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 23:56:45,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-19 23:56:46,016 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-19 23:56:46,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 23:56:46,018 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 20 conjunts are in the unsatisfiable core [2023-12-19 23:56:46,023 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 23:56:46,084 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2023-12-19 23:56:46,085 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 23:56:48,428 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-12-19 23:56:48,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819972805] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 23:56:48,428 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 23:56:48,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 21] total 26 [2023-12-19 23:56:48,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045528332] [2023-12-19 23:56:48,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 23:56:48,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-12-19 23:56:48,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 23:56:48,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-12-19 23:56:48,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=471, Unknown=0, NotChecked=0, Total=650 [2023-12-19 23:56:48,435 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand has 26 states, 24 states have (on average 2.0) internal successors, (48), 25 states have internal predecessors, (48), 12 states have call successors, (12), 1 states have call predecessors, (12), 10 states have return successors, (26), 9 states have call predecessors, (26), 12 states have call successors, (26) [2023-12-19 23:56:48,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 23:56:48,527 INFO L93 Difference]: Finished difference Result 42 states and 43 transitions. [2023-12-19 23:56:48,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-19 23:56:48,529 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 2.0) internal successors, (48), 25 states have internal predecessors, (48), 12 states have call successors, (12), 1 states have call predecessors, (12), 10 states have return successors, (26), 9 states have call predecessors, (26), 12 states have call successors, (26) Word has length 57 [2023-12-19 23:56:48,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 23:56:48,532 INFO L225 Difference]: With dead ends: 42 [2023-12-19 23:56:48,532 INFO L226 Difference]: Without dead ends: 38 [2023-12-19 23:56:48,532 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 108 SyntacticMatches, 9 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=387, Invalid=803, Unknown=0, NotChecked=0, Total=1190 [2023-12-19 23:56:48,533 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 61 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-19 23:56:48,534 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 67 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 23:56:48,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-12-19 23:56:48,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2023-12-19 23:56:48,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 25 states have (on average 1.04) internal successors, (26), 26 states have internal predecessors, (26), 2 states have call successors, (2), 1 states have call predecessors, (2), 10 states have return successors, (11), 10 states have call predecessors, (11), 2 states have call successors, (11) [2023-12-19 23:56:48,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2023-12-19 23:56:48,544 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 57 [2023-12-19 23:56:48,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 23:56:48,544 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2023-12-19 23:56:48,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 2.0) internal successors, (48), 25 states have internal predecessors, (48), 12 states have call successors, (12), 1 states have call predecessors, (12), 10 states have return successors, (26), 9 states have call predecessors, (26), 12 states have call successors, (26) [2023-12-19 23:56:48,544 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2023-12-19 23:56:48,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-12-19 23:56:48,548 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 23:56:48,548 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 23:56:48,556 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-12-19 23:56:48,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-12-19 23:56:48,756 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 23:56:48,756 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 23:56:48,756 INFO L85 PathProgramCache]: Analyzing trace with hash -682001842, now seen corresponding path program 9 times [2023-12-19 23:56:48,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 23:56:48,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900981849] [2023-12-19 23:56:48,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 23:56:48,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 23:56:48,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:48,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-19 23:56:48,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:48,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:48,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:48,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:48,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:48,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:48,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:48,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:48,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:48,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:48,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:49,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:49,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:49,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:49,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:49,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:49,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:49,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:49,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:49,077 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2023-12-19 23:56:49,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 23:56:49,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900981849] [2023-12-19 23:56:49,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900981849] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 23:56:49,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070047523] [2023-12-19 23:56:49,078 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-19 23:56:49,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 23:56:49,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 23:56:49,094 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 23:56:49,157 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-19 23:56:49,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2023-12-19 23:56:49,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 23:56:49,271 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 22 conjunts are in the unsatisfiable core [2023-12-19 23:56:49,273 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 23:56:49,321 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2023-12-19 23:56:49,321 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 23:56:52,311 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 207 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-12-19 23:56:52,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070047523] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 23:56:52,311 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 23:56:52,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 23] total 28 [2023-12-19 23:56:52,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355160474] [2023-12-19 23:56:52,312 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 23:56:52,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-12-19 23:56:52,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 23:56:52,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-12-19 23:56:52,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=549, Unknown=0, NotChecked=0, Total=756 [2023-12-19 23:56:52,313 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand has 28 states, 26 states have (on average 2.0) internal successors, (52), 27 states have internal predecessors, (52), 13 states have call successors, (13), 1 states have call predecessors, (13), 11 states have return successors, (29), 10 states have call predecessors, (29), 13 states have call successors, (29) [2023-12-19 23:56:52,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 23:56:52,417 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2023-12-19 23:56:52,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-19 23:56:52,417 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 2.0) internal successors, (52), 27 states have internal predecessors, (52), 13 states have call successors, (13), 1 states have call predecessors, (13), 11 states have return successors, (29), 10 states have call predecessors, (29), 13 states have call successors, (29) Word has length 63 [2023-12-19 23:56:52,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 23:56:52,418 INFO L225 Difference]: With dead ends: 45 [2023-12-19 23:56:52,418 INFO L226 Difference]: Without dead ends: 41 [2023-12-19 23:56:52,419 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 120 SyntacticMatches, 10 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=458, Invalid=948, Unknown=0, NotChecked=0, Total=1406 [2023-12-19 23:56:52,419 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 81 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-19 23:56:52,419 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 69 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 23:56:52,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-12-19 23:56:52,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2023-12-19 23:56:52,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 27 states have (on average 1.037037037037037) internal successors, (28), 28 states have internal predecessors, (28), 2 states have call successors, (2), 1 states have call predecessors, (2), 11 states have return successors, (12), 11 states have call predecessors, (12), 2 states have call successors, (12) [2023-12-19 23:56:52,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2023-12-19 23:56:52,422 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 63 [2023-12-19 23:56:52,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 23:56:52,422 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2023-12-19 23:56:52,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 2.0) internal successors, (52), 27 states have internal predecessors, (52), 13 states have call successors, (13), 1 states have call predecessors, (13), 11 states have return successors, (29), 10 states have call predecessors, (29), 13 states have call successors, (29) [2023-12-19 23:56:52,422 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2023-12-19 23:56:52,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-12-19 23:56:52,423 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 23:56:52,423 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 23:56:52,438 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-12-19 23:56:52,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-12-19 23:56:52,629 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 23:56:52,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 23:56:52,629 INFO L85 PathProgramCache]: Analyzing trace with hash 1904272772, now seen corresponding path program 10 times [2023-12-19 23:56:52,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 23:56:52,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704395724] [2023-12-19 23:56:52,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 23:56:52,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 23:56:52,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:52,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-19 23:56:52,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:52,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:52,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:52,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:52,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:52,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:52,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:52,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:52,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:52,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:52,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:52,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:52,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:52,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:52,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:52,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:52,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:52,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:52,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:53,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:53,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:53,022 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 165 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2023-12-19 23:56:53,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 23:56:53,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704395724] [2023-12-19 23:56:53,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704395724] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 23:56:53,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703742444] [2023-12-19 23:56:53,023 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-19 23:56:53,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 23:56:53,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 23:56:53,024 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 23:56:53,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-19 23:56:53,208 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-19 23:56:53,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 23:56:53,209 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 24 conjunts are in the unsatisfiable core [2023-12-19 23:56:53,210 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 23:56:53,276 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2023-12-19 23:56:53,276 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 23:56:57,502 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 255 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-12-19 23:56:57,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703742444] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 23:56:57,502 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 23:56:57,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 25] total 30 [2023-12-19 23:56:57,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787654065] [2023-12-19 23:56:57,502 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 23:56:57,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-12-19 23:56:57,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 23:56:57,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-12-19 23:56:57,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=633, Unknown=0, NotChecked=0, Total=870 [2023-12-19 23:56:57,504 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand has 30 states, 28 states have (on average 2.0) internal successors, (56), 29 states have internal predecessors, (56), 14 states have call successors, (14), 1 states have call predecessors, (14), 12 states have return successors, (32), 11 states have call predecessors, (32), 14 states have call successors, (32) [2023-12-19 23:56:57,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 23:56:57,606 INFO L93 Difference]: Finished difference Result 48 states and 49 transitions. [2023-12-19 23:56:57,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-12-19 23:56:57,607 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 28 states have (on average 2.0) internal successors, (56), 29 states have internal predecessors, (56), 14 states have call successors, (14), 1 states have call predecessors, (14), 12 states have return successors, (32), 11 states have call predecessors, (32), 14 states have call successors, (32) Word has length 69 [2023-12-19 23:56:57,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 23:56:57,608 INFO L225 Difference]: With dead ends: 48 [2023-12-19 23:56:57,608 INFO L226 Difference]: Without dead ends: 44 [2023-12-19 23:56:57,609 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 132 SyntacticMatches, 11 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=535, Invalid=1105, Unknown=0, NotChecked=0, Total=1640 [2023-12-19 23:56:57,609 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 30 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-19 23:56:57,609 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 78 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 23:56:57,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-12-19 23:56:57,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2023-12-19 23:56:57,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 29 states have (on average 1.0344827586206897) internal successors, (30), 30 states have internal predecessors, (30), 2 states have call successors, (2), 1 states have call predecessors, (2), 12 states have return successors, (13), 12 states have call predecessors, (13), 2 states have call successors, (13) [2023-12-19 23:56:57,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2023-12-19 23:56:57,618 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 69 [2023-12-19 23:56:57,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 23:56:57,619 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2023-12-19 23:56:57,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 28 states have (on average 2.0) internal successors, (56), 29 states have internal predecessors, (56), 14 states have call successors, (14), 1 states have call predecessors, (14), 12 states have return successors, (32), 11 states have call predecessors, (32), 14 states have call successors, (32) [2023-12-19 23:56:57,619 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2023-12-19 23:56:57,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-12-19 23:56:57,619 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 23:56:57,619 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 23:56:57,625 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-12-19 23:56:57,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-12-19 23:56:57,825 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 23:56:57,825 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 23:56:57,826 INFO L85 PathProgramCache]: Analyzing trace with hash -776930930, now seen corresponding path program 11 times [2023-12-19 23:56:57,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 23:56:57,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895010590] [2023-12-19 23:56:57,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 23:56:57,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 23:56:57,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:57,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-19 23:56:57,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:57,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:57,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:57,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:57,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:58,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:58,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:58,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:58,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:58,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:58,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:58,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:58,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:58,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:58,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:58,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:58,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:58,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:58,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:58,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:58,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:58,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:58,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:58,249 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2023-12-19 23:56:58,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 23:56:58,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895010590] [2023-12-19 23:56:58,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895010590] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 23:56:58,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236887312] [2023-12-19 23:56:58,250 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-19 23:56:58,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 23:56:58,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 23:56:58,262 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 23:56:58,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-19 23:56:58,588 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2023-12-19 23:56:58,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 23:56:58,589 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 26 conjunts are in the unsatisfiable core [2023-12-19 23:56:58,590 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 23:56:58,668 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2023-12-19 23:56:58,668 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 23:57:03,750 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 308 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-12-19 23:57:03,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236887312] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 23:57:03,751 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 23:57:03,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 27] total 32 [2023-12-19 23:57:03,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414676687] [2023-12-19 23:57:03,751 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 23:57:03,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-12-19 23:57:03,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 23:57:03,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-12-19 23:57:03,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=723, Unknown=0, NotChecked=0, Total=992 [2023-12-19 23:57:03,753 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand has 32 states, 30 states have (on average 2.0) internal successors, (60), 31 states have internal predecessors, (60), 15 states have call successors, (15), 1 states have call predecessors, (15), 13 states have return successors, (35), 12 states have call predecessors, (35), 15 states have call successors, (35) [2023-12-19 23:57:03,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 23:57:03,863 INFO L93 Difference]: Finished difference Result 51 states and 52 transitions. [2023-12-19 23:57:03,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-12-19 23:57:03,864 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 30 states have (on average 2.0) internal successors, (60), 31 states have internal predecessors, (60), 15 states have call successors, (15), 1 states have call predecessors, (15), 13 states have return successors, (35), 12 states have call predecessors, (35), 15 states have call successors, (35) Word has length 75 [2023-12-19 23:57:03,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 23:57:03,864 INFO L225 Difference]: With dead ends: 51 [2023-12-19 23:57:03,864 INFO L226 Difference]: Without dead ends: 47 [2023-12-19 23:57:03,867 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 144 SyntacticMatches, 12 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 717 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=618, Invalid=1274, Unknown=0, NotChecked=0, Total=1892 [2023-12-19 23:57:03,867 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 114 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-19 23:57:03,868 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 80 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 23:57:03,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-12-19 23:57:03,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2023-12-19 23:57:03,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 31 states have (on average 1.032258064516129) internal successors, (32), 32 states have internal predecessors, (32), 2 states have call successors, (2), 1 states have call predecessors, (2), 13 states have return successors, (14), 13 states have call predecessors, (14), 2 states have call successors, (14) [2023-12-19 23:57:03,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2023-12-19 23:57:03,878 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 75 [2023-12-19 23:57:03,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 23:57:03,879 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2023-12-19 23:57:03,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 30 states have (on average 2.0) internal successors, (60), 31 states have internal predecessors, (60), 15 states have call successors, (15), 1 states have call predecessors, (15), 13 states have return successors, (35), 12 states have call predecessors, (35), 15 states have call successors, (35) [2023-12-19 23:57:03,879 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2023-12-19 23:57:03,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-12-19 23:57:03,879 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 23:57:03,880 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 23:57:03,898 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-12-19 23:57:04,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-12-19 23:57:04,086 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 23:57:04,086 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 23:57:04,086 INFO L85 PathProgramCache]: Analyzing trace with hash -1158839228, now seen corresponding path program 12 times [2023-12-19 23:57:04,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 23:57:04,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988811180] [2023-12-19 23:57:04,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 23:57:04,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 23:57:04,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:04,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-19 23:57:04,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:04,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:57:04,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:04,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:57:04,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:04,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:57:04,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:04,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:57:04,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:04,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:57:04,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:04,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:57:04,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:04,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:57:04,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:04,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:57:04,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:04,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:57:04,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:04,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:57:04,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:04,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:57:04,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:04,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:57:04,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:04,594 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 234 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2023-12-19 23:57:04,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 23:57:04,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988811180] [2023-12-19 23:57:04,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988811180] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 23:57:04,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379044586] [2023-12-19 23:57:04,595 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-19 23:57:04,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 23:57:04,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 23:57:04,600 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 23:57:04,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-19 23:57:05,005 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2023-12-19 23:57:05,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 23:57:05,006 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 28 conjunts are in the unsatisfiable core [2023-12-19 23:57:05,008 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 23:57:05,074 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2023-12-19 23:57:05,074 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 23:57:11,079 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 366 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2023-12-19 23:57:11,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379044586] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 23:57:11,079 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 23:57:11,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 29] total 34 [2023-12-19 23:57:11,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190883139] [2023-12-19 23:57:11,080 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 23:57:11,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-12-19 23:57:11,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 23:57:11,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-12-19 23:57:11,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=819, Unknown=0, NotChecked=0, Total=1122 [2023-12-19 23:57:11,084 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand has 34 states, 32 states have (on average 2.0) internal successors, (64), 33 states have internal predecessors, (64), 16 states have call successors, (16), 1 states have call predecessors, (16), 14 states have return successors, (38), 13 states have call predecessors, (38), 16 states have call successors, (38) [2023-12-19 23:57:11,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 23:57:11,238 INFO L93 Difference]: Finished difference Result 54 states and 55 transitions. [2023-12-19 23:57:11,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-12-19 23:57:11,238 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 32 states have (on average 2.0) internal successors, (64), 33 states have internal predecessors, (64), 16 states have call successors, (16), 1 states have call predecessors, (16), 14 states have return successors, (38), 13 states have call predecessors, (38), 16 states have call successors, (38) Word has length 81 [2023-12-19 23:57:11,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 23:57:11,241 INFO L225 Difference]: With dead ends: 54 [2023-12-19 23:57:11,241 INFO L226 Difference]: Without dead ends: 50 [2023-12-19 23:57:11,242 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 156 SyntacticMatches, 13 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 835 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=707, Invalid=1455, Unknown=0, NotChecked=0, Total=2162 [2023-12-19 23:57:11,243 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 215 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-19 23:57:11,243 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [230 Valid, 89 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-19 23:57:11,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-12-19 23:57:11,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2023-12-19 23:57:11,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 33 states have (on average 1.0303030303030303) internal successors, (34), 34 states have internal predecessors, (34), 2 states have call successors, (2), 1 states have call predecessors, (2), 14 states have return successors, (15), 14 states have call predecessors, (15), 2 states have call successors, (15) [2023-12-19 23:57:11,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2023-12-19 23:57:11,254 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 81 [2023-12-19 23:57:11,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 23:57:11,254 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2023-12-19 23:57:11,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 32 states have (on average 2.0) internal successors, (64), 33 states have internal predecessors, (64), 16 states have call successors, (16), 1 states have call predecessors, (16), 14 states have return successors, (38), 13 states have call predecessors, (38), 16 states have call successors, (38) [2023-12-19 23:57:11,254 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2023-12-19 23:57:11,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-12-19 23:57:11,255 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 23:57:11,255 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 23:57:11,263 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-12-19 23:57:11,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-12-19 23:57:11,463 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 23:57:11,463 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 23:57:11,463 INFO L85 PathProgramCache]: Analyzing trace with hash 1570097358, now seen corresponding path program 13 times [2023-12-19 23:57:11,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 23:57:11,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766305464] [2023-12-19 23:57:11,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 23:57:11,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 23:57:11,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:11,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-19 23:57:11,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:11,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:57:11,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:11,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:57:11,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:11,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:57:11,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:11,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:57:11,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:11,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:57:11,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:11,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:57:11,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:11,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:57:11,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:11,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:57:11,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:11,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:57:11,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:11,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:57:11,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:11,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:57:11,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:11,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:57:11,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:12,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:57:12,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:12,028 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 273 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2023-12-19 23:57:12,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 23:57:12,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766305464] [2023-12-19 23:57:12,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766305464] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 23:57:12,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363510503] [2023-12-19 23:57:12,029 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-19 23:57:12,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 23:57:12,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 23:57:12,035 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 23:57:12,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-19 23:57:12,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:12,510 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 30 conjunts are in the unsatisfiable core [2023-12-19 23:57:12,511 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 23:57:12,583 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2023-12-19 23:57:12,584 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 23:57:19,696 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 429 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2023-12-19 23:57:19,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363510503] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 23:57:19,697 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 23:57:19,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 31] total 36 [2023-12-19 23:57:19,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430738707] [2023-12-19 23:57:19,697 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 23:57:19,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-12-19 23:57:19,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 23:57:19,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-12-19 23:57:19,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=339, Invalid=921, Unknown=0, NotChecked=0, Total=1260 [2023-12-19 23:57:19,698 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand has 36 states, 34 states have (on average 2.0) internal successors, (68), 35 states have internal predecessors, (68), 17 states have call successors, (17), 1 states have call predecessors, (17), 15 states have return successors, (41), 14 states have call predecessors, (41), 17 states have call successors, (41) [2023-12-19 23:57:19,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 23:57:19,839 INFO L93 Difference]: Finished difference Result 57 states and 58 transitions. [2023-12-19 23:57:19,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-12-19 23:57:19,840 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 34 states have (on average 2.0) internal successors, (68), 35 states have internal predecessors, (68), 17 states have call successors, (17), 1 states have call predecessors, (17), 15 states have return successors, (41), 14 states have call predecessors, (41), 17 states have call successors, (41) Word has length 87 [2023-12-19 23:57:19,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 23:57:19,840 INFO L225 Difference]: With dead ends: 57 [2023-12-19 23:57:19,840 INFO L226 Difference]: Without dead ends: 53 [2023-12-19 23:57:19,841 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 168 SyntacticMatches, 14 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 962 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=802, Invalid=1648, Unknown=0, NotChecked=0, Total=2450 [2023-12-19 23:57:19,842 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 120 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-19 23:57:19,842 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 93 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-19 23:57:19,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-12-19 23:57:19,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2023-12-19 23:57:19,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 35 states have (on average 1.0285714285714285) internal successors, (36), 36 states have internal predecessors, (36), 2 states have call successors, (2), 1 states have call predecessors, (2), 15 states have return successors, (16), 15 states have call predecessors, (16), 2 states have call successors, (16) [2023-12-19 23:57:19,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2023-12-19 23:57:19,844 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 87 [2023-12-19 23:57:19,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 23:57:19,844 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2023-12-19 23:57:19,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 34 states have (on average 2.0) internal successors, (68), 35 states have internal predecessors, (68), 17 states have call successors, (17), 1 states have call predecessors, (17), 15 states have return successors, (41), 14 states have call predecessors, (41), 17 states have call successors, (41) [2023-12-19 23:57:19,845 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2023-12-19 23:57:19,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2023-12-19 23:57:19,845 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 23:57:19,845 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 23:57:19,868 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-12-19 23:57:20,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-12-19 23:57:20,069 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 23:57:20,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 23:57:20,070 INFO L85 PathProgramCache]: Analyzing trace with hash -1407069436, now seen corresponding path program 14 times [2023-12-19 23:57:20,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 23:57:20,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447004616] [2023-12-19 23:57:20,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 23:57:20,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 23:57:20,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:20,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-19 23:57:20,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:20,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:57:20,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:20,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:57:20,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:20,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:57:20,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:20,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:57:20,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:20,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:57:20,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:20,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:57:20,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:20,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:57:20,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:20,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:57:20,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:20,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:57:20,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:20,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:57:20,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:20,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:57:20,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:20,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:57:20,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:20,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:57:20,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:20,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:57:20,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:20,681 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 315 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2023-12-19 23:57:20,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 23:57:20,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447004616] [2023-12-19 23:57:20,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447004616] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 23:57:20,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525462209] [2023-12-19 23:57:20,681 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-19 23:57:20,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 23:57:20,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 23:57:20,682 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 23:57:20,684 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-12-19 23:57:21,264 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-19 23:57:21,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 23:57:21,265 INFO L262 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 32 conjunts are in the unsatisfiable core [2023-12-19 23:57:21,266 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 23:57:21,350 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2023-12-19 23:57:21,351 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 23:57:29,877 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 497 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2023-12-19 23:57:29,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525462209] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 23:57:29,877 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 23:57:29,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 33] total 38 [2023-12-19 23:57:29,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756343494] [2023-12-19 23:57:29,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 23:57:29,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-12-19 23:57:29,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 23:57:29,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-12-19 23:57:29,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=377, Invalid=1029, Unknown=0, NotChecked=0, Total=1406 [2023-12-19 23:57:29,879 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand has 38 states, 36 states have (on average 2.0) internal successors, (72), 37 states have internal predecessors, (72), 18 states have call successors, (18), 1 states have call predecessors, (18), 16 states have return successors, (44), 15 states have call predecessors, (44), 18 states have call successors, (44) [2023-12-19 23:57:30,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 23:57:30,045 INFO L93 Difference]: Finished difference Result 60 states and 61 transitions. [2023-12-19 23:57:30,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-12-19 23:57:30,045 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 36 states have (on average 2.0) internal successors, (72), 37 states have internal predecessors, (72), 18 states have call successors, (18), 1 states have call predecessors, (18), 16 states have return successors, (44), 15 states have call predecessors, (44), 18 states have call successors, (44) Word has length 93 [2023-12-19 23:57:30,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 23:57:30,046 INFO L225 Difference]: With dead ends: 60 [2023-12-19 23:57:30,046 INFO L226 Difference]: Without dead ends: 56 [2023-12-19 23:57:30,047 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 180 SyntacticMatches, 15 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1098 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=903, Invalid=1853, Unknown=0, NotChecked=0, Total=2756 [2023-12-19 23:57:30,047 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 153 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-19 23:57:30,047 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [170 Valid, 99 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-19 23:57:30,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2023-12-19 23:57:30,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2023-12-19 23:57:30,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 37 states have (on average 1.027027027027027) internal successors, (38), 38 states have internal predecessors, (38), 2 states have call successors, (2), 1 states have call predecessors, (2), 16 states have return successors, (17), 16 states have call predecessors, (17), 2 states have call successors, (17) [2023-12-19 23:57:30,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2023-12-19 23:57:30,050 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 93 [2023-12-19 23:57:30,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 23:57:30,050 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2023-12-19 23:57:30,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 36 states have (on average 2.0) internal successors, (72), 37 states have internal predecessors, (72), 18 states have call successors, (18), 1 states have call predecessors, (18), 16 states have return successors, (44), 15 states have call predecessors, (44), 18 states have call successors, (44) [2023-12-19 23:57:30,050 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2023-12-19 23:57:30,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2023-12-19 23:57:30,050 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 23:57:30,051 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 23:57:30,058 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-12-19 23:57:30,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 23:57:30,258 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 23:57:30,258 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 23:57:30,258 INFO L85 PathProgramCache]: Analyzing trace with hash -1758730226, now seen corresponding path program 15 times [2023-12-19 23:57:30,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 23:57:30,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783071478] [2023-12-19 23:57:30,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 23:57:30,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 23:57:30,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:30,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-19 23:57:30,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:30,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:57:30,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:30,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:57:30,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:30,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:57:30,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:30,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:57:30,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:30,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:57:30,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:30,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:57:30,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:30,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:57:30,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:30,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:57:30,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:30,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:57:30,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:30,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:57:30,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:30,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:57:30,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:30,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:57:30,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:30,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:57:30,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:30,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:57:30,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:30,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:57:30,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:30,958 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 360 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2023-12-19 23:57:30,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 23:57:30,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783071478] [2023-12-19 23:57:30,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783071478] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 23:57:30,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358117541] [2023-12-19 23:57:30,959 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-19 23:57:30,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 23:57:30,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 23:57:30,960 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 23:57:30,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-12-19 23:57:31,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2023-12-19 23:57:31,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 23:57:31,778 INFO L262 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 34 conjunts are in the unsatisfiable core [2023-12-19 23:57:31,780 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 23:57:31,889 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2023-12-19 23:57:31,889 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 23:57:42,489 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 570 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2023-12-19 23:57:42,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358117541] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 23:57:42,489 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 23:57:42,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 35] total 40 [2023-12-19 23:57:42,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382222352] [2023-12-19 23:57:42,489 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 23:57:42,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-12-19 23:57:42,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 23:57:42,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-12-19 23:57:42,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=417, Invalid=1143, Unknown=0, NotChecked=0, Total=1560 [2023-12-19 23:57:42,492 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand has 40 states, 38 states have (on average 2.0) internal successors, (76), 39 states have internal predecessors, (76), 19 states have call successors, (19), 1 states have call predecessors, (19), 17 states have return successors, (47), 16 states have call predecessors, (47), 19 states have call successors, (47) [2023-12-19 23:57:42,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 23:57:42,601 INFO L93 Difference]: Finished difference Result 63 states and 64 transitions. [2023-12-19 23:57:42,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-12-19 23:57:42,601 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 38 states have (on average 2.0) internal successors, (76), 39 states have internal predecessors, (76), 19 states have call successors, (19), 1 states have call predecessors, (19), 17 states have return successors, (47), 16 states have call predecessors, (47), 19 states have call successors, (47) Word has length 99 [2023-12-19 23:57:42,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 23:57:42,602 INFO L225 Difference]: With dead ends: 63 [2023-12-19 23:57:42,602 INFO L226 Difference]: Without dead ends: 59 [2023-12-19 23:57:42,603 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 192 SyntacticMatches, 16 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1243 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1010, Invalid=2070, Unknown=0, NotChecked=0, Total=3080 [2023-12-19 23:57:42,603 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 73 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-19 23:57:42,603 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 99 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 23:57:42,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-12-19 23:57:42,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2023-12-19 23:57:42,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 39 states have (on average 1.0256410256410255) internal successors, (40), 40 states have internal predecessors, (40), 2 states have call successors, (2), 1 states have call predecessors, (2), 17 states have return successors, (18), 17 states have call predecessors, (18), 2 states have call successors, (18) [2023-12-19 23:57:42,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2023-12-19 23:57:42,605 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 99 [2023-12-19 23:57:42,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 23:57:42,605 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2023-12-19 23:57:42,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 38 states have (on average 2.0) internal successors, (76), 39 states have internal predecessors, (76), 19 states have call successors, (19), 1 states have call predecessors, (19), 17 states have return successors, (47), 16 states have call predecessors, (47), 19 states have call successors, (47) [2023-12-19 23:57:42,606 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2023-12-19 23:57:42,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2023-12-19 23:57:42,606 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 23:57:42,606 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 23:57:42,614 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-12-19 23:57:42,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-12-19 23:57:42,807 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 23:57:42,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 23:57:42,807 INFO L85 PathProgramCache]: Analyzing trace with hash -1678126652, now seen corresponding path program 16 times [2023-12-19 23:57:42,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 23:57:42,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006206932] [2023-12-19 23:57:42,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 23:57:42,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 23:57:42,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:42,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-19 23:57:42,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:42,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:57:43,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:43,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:57:43,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:43,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:57:43,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:43,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:57:43,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:43,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:57:43,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:43,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:57:43,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:43,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:57:43,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:43,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:57:43,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:43,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:57:43,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:43,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:57:43,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:43,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:57:43,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:43,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:57:43,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:43,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:57:43,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:43,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:57:43,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:43,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:57:43,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:43,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:57:43,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:43,611 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 408 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2023-12-19 23:57:43,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 23:57:43,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006206932] [2023-12-19 23:57:43,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006206932] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 23:57:43,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417258354] [2023-12-19 23:57:43,612 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-19 23:57:43,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 23:57:43,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 23:57:43,613 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 23:57:43,617 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-12-19 23:57:44,563 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-19 23:57:44,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 23:57:44,564 INFO L262 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 36 conjunts are in the unsatisfiable core [2023-12-19 23:57:44,566 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 23:57:44,662 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2023-12-19 23:57:44,663 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 23:57:58,737 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 648 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2023-12-19 23:57:58,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417258354] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 23:57:58,737 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 23:57:58,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 37] total 42 [2023-12-19 23:57:58,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229785491] [2023-12-19 23:57:58,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 23:57:58,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-12-19 23:57:58,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 23:57:58,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-12-19 23:57:58,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=459, Invalid=1263, Unknown=0, NotChecked=0, Total=1722 [2023-12-19 23:57:58,740 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand has 42 states, 40 states have (on average 2.0) internal successors, (80), 41 states have internal predecessors, (80), 20 states have call successors, (20), 1 states have call predecessors, (20), 18 states have return successors, (50), 17 states have call predecessors, (50), 20 states have call successors, (50) [2023-12-19 23:57:58,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 23:57:58,929 INFO L93 Difference]: Finished difference Result 66 states and 67 transitions. [2023-12-19 23:57:58,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-12-19 23:57:58,930 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 40 states have (on average 2.0) internal successors, (80), 41 states have internal predecessors, (80), 20 states have call successors, (20), 1 states have call predecessors, (20), 18 states have return successors, (50), 17 states have call predecessors, (50), 20 states have call successors, (50) Word has length 105 [2023-12-19 23:57:58,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 23:57:58,931 INFO L225 Difference]: With dead ends: 66 [2023-12-19 23:57:58,931 INFO L226 Difference]: Without dead ends: 62 [2023-12-19 23:57:58,932 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 204 SyntacticMatches, 17 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1397 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1123, Invalid=2299, Unknown=0, NotChecked=0, Total=3422 [2023-12-19 23:57:58,932 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 129 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-19 23:57:58,933 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 103 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-19 23:57:58,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2023-12-19 23:57:58,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2023-12-19 23:57:58,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 41 states have (on average 1.024390243902439) internal successors, (42), 42 states have internal predecessors, (42), 2 states have call successors, (2), 1 states have call predecessors, (2), 18 states have return successors, (19), 18 states have call predecessors, (19), 2 states have call successors, (19) [2023-12-19 23:57:58,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 63 transitions. [2023-12-19 23:57:58,935 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 63 transitions. Word has length 105 [2023-12-19 23:57:58,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 23:57:58,936 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 63 transitions. [2023-12-19 23:57:58,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 40 states have (on average 2.0) internal successors, (80), 41 states have internal predecessors, (80), 20 states have call successors, (20), 1 states have call predecessors, (20), 18 states have return successors, (50), 17 states have call predecessors, (50), 20 states have call successors, (50) [2023-12-19 23:57:58,936 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 63 transitions. [2023-12-19 23:57:58,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2023-12-19 23:57:58,937 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 23:57:58,937 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 23:57:58,948 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-12-19 23:57:59,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-12-19 23:57:59,141 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 23:57:59,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 23:57:59,141 INFO L85 PathProgramCache]: Analyzing trace with hash -543729842, now seen corresponding path program 17 times [2023-12-19 23:57:59,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 23:57:59,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263318585] [2023-12-19 23:57:59,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 23:57:59,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 23:57:59,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:59,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-19 23:57:59,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:59,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:57:59,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:59,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:57:59,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:59,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:57:59,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:59,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:57:59,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:59,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:57:59,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:59,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:57:59,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:59,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:57:59,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:59,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:57:59,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:59,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:57:59,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:59,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:57:59,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:59,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:57:59,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:59,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:57:59,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:59,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:57:59,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:59,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:57:59,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:59,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:57:59,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:59,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:57:59,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:58:00,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:58:00,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:58:00,028 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 459 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2023-12-19 23:58:00,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 23:58:00,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263318585] [2023-12-19 23:58:00,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263318585] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 23:58:00,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076304713] [2023-12-19 23:58:00,028 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-19 23:58:00,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 23:58:00,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 23:58:00,029 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 23:58:00,056 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-12-19 23:58:01,286 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2023-12-19 23:58:01,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 23:58:01,287 INFO L262 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 38 conjunts are in the unsatisfiable core [2023-12-19 23:58:01,289 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 23:58:01,396 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2023-12-19 23:58:01,396 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 23:58:18,680 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 731 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2023-12-19 23:58:18,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076304713] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 23:58:18,680 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 23:58:18,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 39] total 44 [2023-12-19 23:58:18,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590391391] [2023-12-19 23:58:18,680 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 23:58:18,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-12-19 23:58:18,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 23:58:18,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-12-19 23:58:18,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=503, Invalid=1389, Unknown=0, NotChecked=0, Total=1892 [2023-12-19 23:58:18,683 INFO L87 Difference]: Start difference. First operand 62 states and 63 transitions. Second operand has 44 states, 42 states have (on average 2.0) internal successors, (84), 43 states have internal predecessors, (84), 21 states have call successors, (21), 1 states have call predecessors, (21), 19 states have return successors, (53), 18 states have call predecessors, (53), 21 states have call successors, (53) [2023-12-19 23:58:18,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 23:58:18,867 INFO L93 Difference]: Finished difference Result 69 states and 70 transitions. [2023-12-19 23:58:18,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-12-19 23:58:18,868 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 42 states have (on average 2.0) internal successors, (84), 43 states have internal predecessors, (84), 21 states have call successors, (21), 1 states have call predecessors, (21), 19 states have return successors, (53), 18 states have call predecessors, (53), 21 states have call successors, (53) Word has length 111 [2023-12-19 23:58:18,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 23:58:18,871 INFO L225 Difference]: With dead ends: 69 [2023-12-19 23:58:18,871 INFO L226 Difference]: Without dead ends: 65 [2023-12-19 23:58:18,872 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 216 SyntacticMatches, 18 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1560 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1242, Invalid=2540, Unknown=0, NotChecked=0, Total=3782 [2023-12-19 23:58:18,873 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 52 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-19 23:58:18,873 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 110 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-19 23:58:18,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-12-19 23:58:18,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2023-12-19 23:58:18,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 43 states have (on average 1.0232558139534884) internal successors, (44), 44 states have internal predecessors, (44), 2 states have call successors, (2), 1 states have call predecessors, (2), 19 states have return successors, (20), 19 states have call predecessors, (20), 2 states have call successors, (20) [2023-12-19 23:58:18,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2023-12-19 23:58:18,875 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 111 [2023-12-19 23:58:18,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 23:58:18,876 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2023-12-19 23:58:18,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 42 states have (on average 2.0) internal successors, (84), 43 states have internal predecessors, (84), 21 states have call successors, (21), 1 states have call predecessors, (21), 19 states have return successors, (53), 18 states have call predecessors, (53), 21 states have call successors, (53) [2023-12-19 23:58:18,876 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2023-12-19 23:58:18,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2023-12-19 23:58:18,877 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 23:58:18,877 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 23:58:18,890 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-12-19 23:58:19,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-12-19 23:58:19,088 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 23:58:19,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 23:58:19,088 INFO L85 PathProgramCache]: Analyzing trace with hash 1011974276, now seen corresponding path program 18 times [2023-12-19 23:58:19,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 23:58:19,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643533395] [2023-12-19 23:58:19,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 23:58:19,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 23:58:19,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:58:19,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-19 23:58:19,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:58:19,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:58:19,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:58:19,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:58:19,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:58:19,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:58:19,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:58:19,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:58:19,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:58:19,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:58:19,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:58:19,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:58:19,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:58:19,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:58:19,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:58:19,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:58:19,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:58:19,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:58:19,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:58:19,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:58:19,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:58:19,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:58:19,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:58:19,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:58:19,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:58:19,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:58:19,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:58:19,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:58:19,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:58:19,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:58:19,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:58:19,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:58:19,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:58:19,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:58:19,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:58:19,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:58:19,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:58:20,005 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 513 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2023-12-19 23:58:20,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 23:58:20,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643533395] [2023-12-19 23:58:20,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643533395] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 23:58:20,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088040040] [2023-12-19 23:58:20,006 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-19 23:58:20,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 23:58:20,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 23:58:20,007 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 23:58:20,020 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-12-19 23:58:21,537 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2023-12-19 23:58:21,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 23:58:21,538 INFO L262 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 40 conjunts are in the unsatisfiable core [2023-12-19 23:58:21,540 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 23:58:21,626 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2023-12-19 23:58:21,626 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 23:58:40,256 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 819 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2023-12-19 23:58:40,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088040040] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 23:58:40,256 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 23:58:40,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 41] total 46 [2023-12-19 23:58:40,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080820772] [2023-12-19 23:58:40,256 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 23:58:40,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-12-19 23:58:40,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 23:58:40,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-12-19 23:58:40,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=549, Invalid=1521, Unknown=0, NotChecked=0, Total=2070 [2023-12-19 23:58:40,258 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand has 46 states, 44 states have (on average 2.0) internal successors, (88), 45 states have internal predecessors, (88), 22 states have call successors, (22), 1 states have call predecessors, (22), 20 states have return successors, (56), 19 states have call predecessors, (56), 22 states have call successors, (56) [2023-12-19 23:58:40,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 23:58:40,423 INFO L93 Difference]: Finished difference Result 72 states and 73 transitions. [2023-12-19 23:58:40,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-12-19 23:58:40,424 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 44 states have (on average 2.0) internal successors, (88), 45 states have internal predecessors, (88), 22 states have call successors, (22), 1 states have call predecessors, (22), 20 states have return successors, (56), 19 states have call predecessors, (56), 22 states have call successors, (56) Word has length 117 [2023-12-19 23:58:40,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 23:58:40,424 INFO L225 Difference]: With dead ends: 72 [2023-12-19 23:58:40,424 INFO L226 Difference]: Without dead ends: 68 [2023-12-19 23:58:40,426 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 228 SyntacticMatches, 19 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1732 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1367, Invalid=2793, Unknown=0, NotChecked=0, Total=4160 [2023-12-19 23:58:40,426 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 150 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-19 23:58:40,426 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 119 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-19 23:58:40,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2023-12-19 23:58:40,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2023-12-19 23:58:40,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 45 states have (on average 1.0222222222222221) internal successors, (46), 46 states have internal predecessors, (46), 2 states have call successors, (2), 1 states have call predecessors, (2), 20 states have return successors, (21), 20 states have call predecessors, (21), 2 states have call successors, (21) [2023-12-19 23:58:40,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2023-12-19 23:58:40,443 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 117 [2023-12-19 23:58:40,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 23:58:40,444 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2023-12-19 23:58:40,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 44 states have (on average 2.0) internal successors, (88), 45 states have internal predecessors, (88), 22 states have call successors, (22), 1 states have call predecessors, (22), 20 states have return successors, (56), 19 states have call predecessors, (56), 22 states have call successors, (56) [2023-12-19 23:58:40,444 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2023-12-19 23:58:40,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-12-19 23:58:40,445 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 23:58:40,445 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 23:58:40,458 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-12-19 23:58:40,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 23:58:40,656 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 23:58:40,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 23:58:40,656 INFO L85 PathProgramCache]: Analyzing trace with hash 486282894, now seen corresponding path program 19 times [2023-12-19 23:58:40,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 23:58:40,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911132243] [2023-12-19 23:58:40,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 23:58:40,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 23:58:40,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:58:40,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-19 23:58:40,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:58:40,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:58:40,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:58:40,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:58:41,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:58:41,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:58:41,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:58:41,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:58:41,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:58:41,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:58:41,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:58:41,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:58:41,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:58:41,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:58:41,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:58:41,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:58:41,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:58:41,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:58:41,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:58:41,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:58:41,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:58:41,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:58:41,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:58:41,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:58:41,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:58:41,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:58:41,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:58:41,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:58:41,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:58:41,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:58:41,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:58:41,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:58:41,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:58:41,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:58:41,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:58:41,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:58:41,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:58:41,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:58:41,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:58:41,758 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 570 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2023-12-19 23:58:41,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 23:58:41,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911132243] [2023-12-19 23:58:41,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911132243] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 23:58:41,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150697634] [2023-12-19 23:58:41,759 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-19 23:58:41,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 23:58:41,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 23:58:41,760 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 23:58:41,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-12-19 23:58:43,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:58:43,602 INFO L262 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 42 conjunts are in the unsatisfiable core [2023-12-19 23:58:43,603 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 23:58:43,722 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2023-12-19 23:58:43,722 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 23:59:10,094 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 912 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2023-12-19 23:59:10,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150697634] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 23:59:10,094 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 23:59:10,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 43] total 48 [2023-12-19 23:59:10,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522550702] [2023-12-19 23:59:10,094 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 23:59:10,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-12-19 23:59:10,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 23:59:10,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-12-19 23:59:10,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=1659, Unknown=0, NotChecked=0, Total=2256 [2023-12-19 23:59:10,096 INFO L87 Difference]: Start difference. First operand 68 states and 69 transitions. Second operand has 48 states, 46 states have (on average 2.0) internal successors, (92), 47 states have internal predecessors, (92), 23 states have call successors, (23), 1 states have call predecessors, (23), 21 states have return successors, (59), 20 states have call predecessors, (59), 23 states have call successors, (59) [2023-12-19 23:59:10,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 23:59:10,335 INFO L93 Difference]: Finished difference Result 75 states and 76 transitions. [2023-12-19 23:59:10,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-12-19 23:59:10,335 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 46 states have (on average 2.0) internal successors, (92), 47 states have internal predecessors, (92), 23 states have call successors, (23), 1 states have call predecessors, (23), 21 states have return successors, (59), 20 states have call predecessors, (59), 23 states have call successors, (59) Word has length 123 [2023-12-19 23:59:10,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 23:59:10,336 INFO L225 Difference]: With dead ends: 75 [2023-12-19 23:59:10,336 INFO L226 Difference]: Without dead ends: 71 [2023-12-19 23:59:10,337 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 240 SyntacticMatches, 20 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1913 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1498, Invalid=3058, Unknown=0, NotChecked=0, Total=4556 [2023-12-19 23:59:10,337 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 357 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 379 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-19 23:59:10,337 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [379 Valid, 127 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-19 23:59:10,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2023-12-19 23:59:10,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2023-12-19 23:59:10,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 47 states have (on average 1.0212765957446808) internal successors, (48), 48 states have internal predecessors, (48), 2 states have call successors, (2), 1 states have call predecessors, (2), 21 states have return successors, (22), 21 states have call predecessors, (22), 2 states have call successors, (22) [2023-12-19 23:59:10,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2023-12-19 23:59:10,340 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 123 [2023-12-19 23:59:10,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 23:59:10,340 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2023-12-19 23:59:10,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 46 states have (on average 2.0) internal successors, (92), 47 states have internal predecessors, (92), 23 states have call successors, (23), 1 states have call predecessors, (23), 21 states have return successors, (59), 20 states have call predecessors, (59), 23 states have call successors, (59) [2023-12-19 23:59:10,340 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2023-12-19 23:59:10,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2023-12-19 23:59:10,341 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 23:59:10,341 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 23:59:10,358 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-12-19 23:59:10,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 23:59:10,554 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 23:59:10,554 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 23:59:10,554 INFO L85 PathProgramCache]: Analyzing trace with hash 1510268740, now seen corresponding path program 20 times [2023-12-19 23:59:10,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 23:59:10,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256633996] [2023-12-19 23:59:10,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 23:59:10,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 23:59:10,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:59:10,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-19 23:59:10,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:59:10,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:59:10,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:59:10,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:59:10,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:59:10,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:59:11,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:59:11,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:59:11,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:59:11,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:59:11,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:59:11,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:59:11,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:59:11,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:59:11,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:59:11,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:59:11,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:59:11,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:59:11,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:59:11,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:59:11,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:59:11,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:59:11,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:59:11,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:59:11,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:59:11,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:59:11,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:59:11,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:59:11,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:59:11,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:59:11,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:59:11,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:59:11,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:59:11,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:59:11,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:59:11,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:59:11,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:59:11,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:59:11,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:59:11,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:59:11,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:59:11,810 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2023-12-19 23:59:11,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 23:59:11,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256633996] [2023-12-19 23:59:11,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256633996] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 23:59:11,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467103409] [2023-12-19 23:59:11,811 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-19 23:59:11,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 23:59:11,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 23:59:11,812 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 23:59:11,814 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-12-19 23:59:14,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-19 23:59:14,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 23:59:14,045 INFO L262 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 44 conjunts are in the unsatisfiable core [2023-12-19 23:59:14,047 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 23:59:14,155 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2023-12-19 23:59:14,155 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 23:59:41,652 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 1010 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2023-12-19 23:59:41,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467103409] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 23:59:41,652 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 23:59:41,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 45] total 50 [2023-12-19 23:59:41,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903378410] [2023-12-19 23:59:41,653 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 23:59:41,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-12-19 23:59:41,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 23:59:41,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-12-19 23:59:41,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=647, Invalid=1803, Unknown=0, NotChecked=0, Total=2450 [2023-12-19 23:59:41,654 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand has 50 states, 48 states have (on average 2.0) internal successors, (96), 49 states have internal predecessors, (96), 24 states have call successors, (24), 1 states have call predecessors, (24), 22 states have return successors, (62), 21 states have call predecessors, (62), 24 states have call successors, (62) [2023-12-19 23:59:41,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 23:59:41,884 INFO L93 Difference]: Finished difference Result 78 states and 79 transitions. [2023-12-19 23:59:41,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-12-19 23:59:41,885 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 48 states have (on average 2.0) internal successors, (96), 49 states have internal predecessors, (96), 24 states have call successors, (24), 1 states have call predecessors, (24), 22 states have return successors, (62), 21 states have call predecessors, (62), 24 states have call successors, (62) Word has length 129 [2023-12-19 23:59:41,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 23:59:41,886 INFO L225 Difference]: With dead ends: 78 [2023-12-19 23:59:41,886 INFO L226 Difference]: Without dead ends: 74 [2023-12-19 23:59:41,887 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 252 SyntacticMatches, 21 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2103 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1635, Invalid=3335, Unknown=0, NotChecked=0, Total=4970 [2023-12-19 23:59:41,887 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 142 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-19 23:59:41,887 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 122 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-19 23:59:41,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2023-12-19 23:59:41,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2023-12-19 23:59:41,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 49 states have (on average 1.0204081632653061) internal successors, (50), 50 states have internal predecessors, (50), 2 states have call successors, (2), 1 states have call predecessors, (2), 22 states have return successors, (23), 22 states have call predecessors, (23), 2 states have call successors, (23) [2023-12-19 23:59:41,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 75 transitions. [2023-12-19 23:59:41,889 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 75 transitions. Word has length 129 [2023-12-19 23:59:41,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 23:59:41,890 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 75 transitions. [2023-12-19 23:59:41,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 48 states have (on average 2.0) internal successors, (96), 49 states have internal predecessors, (96), 24 states have call successors, (24), 1 states have call predecessors, (24), 22 states have return successors, (62), 21 states have call predecessors, (62), 24 states have call successors, (62) [2023-12-19 23:59:41,890 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 75 transitions. [2023-12-19 23:59:41,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2023-12-19 23:59:41,890 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 23:59:41,890 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 23:59:41,910 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-12-19 23:59:42,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-12-19 23:59:42,092 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 23:59:42,092 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 23:59:42,092 INFO L85 PathProgramCache]: Analyzing trace with hash -92396082, now seen corresponding path program 21 times [2023-12-19 23:59:42,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 23:59:42,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721303329] [2023-12-19 23:59:42,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 23:59:42,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 23:59:42,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:59:42,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-19 23:59:42,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:59:42,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:59:42,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:59:42,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:59:42,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:59:42,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:59:42,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:59:42,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:59:42,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:59:42,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:59:42,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:59:42,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:59:42,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:59:42,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:59:42,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:59:42,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:59:42,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:59:42,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:59:42,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:59:43,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:59:43,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:59:43,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:59:43,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:59:43,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:59:43,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:59:43,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:59:43,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:59:43,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:59:43,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:59:43,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:59:43,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:59:43,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:59:43,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:59:43,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:59:43,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:59:43,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:59:43,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:59:43,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:59:43,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:59:43,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:59:43,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:59:43,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:59:43,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:59:43,411 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 693 refuted. 0 times theorem prover too weak. 651 trivial. 0 not checked. [2023-12-19 23:59:43,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 23:59:43,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721303329] [2023-12-19 23:59:43,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721303329] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 23:59:43,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078301893] [2023-12-19 23:59:43,411 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-19 23:59:43,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 23:59:43,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 23:59:43,412 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 23:59:43,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-12-19 23:59:46,079 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2023-12-19 23:59:46,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 23:59:46,080 INFO L262 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 46 conjunts are in the unsatisfiable core [2023-12-19 23:59:46,082 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 23:59:46,212 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2023-12-19 23:59:46,212 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 00:00:19,738 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 1113 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2023-12-20 00:00:19,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078301893] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 00:00:19,738 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 00:00:19,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 47] total 52 [2023-12-20 00:00:19,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536152333] [2023-12-20 00:00:19,739 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 00:00:19,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2023-12-20 00:00:19,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 00:00:19,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2023-12-20 00:00:19,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=699, Invalid=1953, Unknown=0, NotChecked=0, Total=2652 [2023-12-20 00:00:19,741 INFO L87 Difference]: Start difference. First operand 74 states and 75 transitions. Second operand has 52 states, 50 states have (on average 2.0) internal successors, (100), 51 states have internal predecessors, (100), 25 states have call successors, (25), 1 states have call predecessors, (25), 23 states have return successors, (65), 22 states have call predecessors, (65), 25 states have call successors, (65) [2023-12-20 00:00:20,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 00:00:20,004 INFO L93 Difference]: Finished difference Result 81 states and 82 transitions. [2023-12-20 00:00:20,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-12-20 00:00:20,005 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 50 states have (on average 2.0) internal successors, (100), 51 states have internal predecessors, (100), 25 states have call successors, (25), 1 states have call predecessors, (25), 23 states have return successors, (65), 22 states have call predecessors, (65), 25 states have call successors, (65) Word has length 135 [2023-12-20 00:00:20,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 00:00:20,005 INFO L225 Difference]: With dead ends: 81 [2023-12-20 00:00:20,005 INFO L226 Difference]: Without dead ends: 77 [2023-12-20 00:00:20,008 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 264 SyntacticMatches, 22 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2302 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1778, Invalid=3624, Unknown=0, NotChecked=0, Total=5402 [2023-12-20 00:00:20,009 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 172 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 00:00:20,009 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [196 Valid, 133 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 00:00:20,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2023-12-20 00:00:20,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2023-12-20 00:00:20,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 51 states have (on average 1.0196078431372548) internal successors, (52), 52 states have internal predecessors, (52), 2 states have call successors, (2), 1 states have call predecessors, (2), 23 states have return successors, (24), 23 states have call predecessors, (24), 2 states have call successors, (24) [2023-12-20 00:00:20,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2023-12-20 00:00:20,022 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 135 [2023-12-20 00:00:20,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 00:00:20,022 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2023-12-20 00:00:20,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 50 states have (on average 2.0) internal successors, (100), 51 states have internal predecessors, (100), 25 states have call successors, (25), 1 states have call predecessors, (25), 23 states have return successors, (65), 22 states have call predecessors, (65), 25 states have call successors, (65) [2023-12-20 00:00:20,023 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2023-12-20 00:00:20,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2023-12-20 00:00:20,033 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 00:00:20,033 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 00:00:20,059 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-12-20 00:00:20,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-12-20 00:00:20,250 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 00:00:20,251 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 00:00:20,251 INFO L85 PathProgramCache]: Analyzing trace with hash -1661997564, now seen corresponding path program 22 times [2023-12-20 00:00:20,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 00:00:20,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248761802] [2023-12-20 00:00:20,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 00:00:20,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 00:00:20,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:00:20,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-20 00:00:20,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:00:20,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 00:00:20,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:00:20,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 00:00:20,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:00:20,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 00:00:20,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:00:20,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 00:00:20,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:00:21,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 00:00:21,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:00:21,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 00:00:21,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:00:21,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 00:00:21,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:00:21,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 00:00:21,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:00:21,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 00:00:21,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:00:21,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 00:00:21,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:00:21,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 00:00:21,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:00:21,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 00:00:21,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:00:21,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 00:00:21,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:00:21,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 00:00:21,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:00:21,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 00:00:21,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:00:21,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 00:00:21,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:00:21,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 00:00:21,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:00:21,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 00:00:21,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:00:21,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 00:00:21,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:00:21,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 00:00:21,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:00:21,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 00:00:21,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:00:21,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 00:00:21,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:00:21,837 INFO L134 CoverageAnalysis]: Checked inductivity of 1474 backedges. 0 proven. 759 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2023-12-20 00:00:21,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 00:00:21,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248761802] [2023-12-20 00:00:21,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248761802] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 00:00:21,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992805216] [2023-12-20 00:00:21,838 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-20 00:00:21,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 00:00:21,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 00:00:21,839 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 00:00:21,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-12-20 00:00:25,021 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-20 00:00:25,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 00:00:25,023 INFO L262 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 48 conjunts are in the unsatisfiable core [2023-12-20 00:00:25,025 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 00:00:25,165 INFO L134 CoverageAnalysis]: Checked inductivity of 1474 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2023-12-20 00:00:25,166 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 00:01:09,938 INFO L134 CoverageAnalysis]: Checked inductivity of 1474 backedges. 0 proven. 1221 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2023-12-20 00:01:09,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992805216] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 00:01:09,939 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 00:01:09,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 49] total 54 [2023-12-20 00:01:09,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495071479] [2023-12-20 00:01:09,939 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 00:01:09,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2023-12-20 00:01:09,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 00:01:09,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2023-12-20 00:01:09,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=753, Invalid=2109, Unknown=0, NotChecked=0, Total=2862 [2023-12-20 00:01:09,940 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand has 54 states, 52 states have (on average 2.0) internal successors, (104), 53 states have internal predecessors, (104), 26 states have call successors, (26), 1 states have call predecessors, (26), 24 states have return successors, (68), 23 states have call predecessors, (68), 26 states have call successors, (68) [2023-12-20 00:01:10,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 00:01:10,223 INFO L93 Difference]: Finished difference Result 84 states and 85 transitions. [2023-12-20 00:01:10,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-12-20 00:01:10,224 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 52 states have (on average 2.0) internal successors, (104), 53 states have internal predecessors, (104), 26 states have call successors, (26), 1 states have call predecessors, (26), 24 states have return successors, (68), 23 states have call predecessors, (68), 26 states have call successors, (68) Word has length 141 [2023-12-20 00:01:10,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 00:01:10,225 INFO L225 Difference]: With dead ends: 84 [2023-12-20 00:01:10,225 INFO L226 Difference]: Without dead ends: 80 [2023-12-20 00:01:10,226 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 276 SyntacticMatches, 23 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2510 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1927, Invalid=3925, Unknown=0, NotChecked=0, Total=5852 [2023-12-20 00:01:10,226 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 200 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 00:01:10,226 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [225 Valid, 141 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 00:01:10,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2023-12-20 00:01:10,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2023-12-20 00:01:10,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 53 states have (on average 1.0188679245283019) internal successors, (54), 54 states have internal predecessors, (54), 2 states have call successors, (2), 1 states have call predecessors, (2), 24 states have return successors, (25), 24 states have call predecessors, (25), 2 states have call successors, (25) [2023-12-20 00:01:10,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 81 transitions. [2023-12-20 00:01:10,230 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 81 transitions. Word has length 141 [2023-12-20 00:01:10,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 00:01:10,231 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 81 transitions. [2023-12-20 00:01:10,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 52 states have (on average 2.0) internal successors, (104), 53 states have internal predecessors, (104), 26 states have call successors, (26), 1 states have call predecessors, (26), 24 states have return successors, (68), 23 states have call predecessors, (68), 26 states have call successors, (68) [2023-12-20 00:01:10,231 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 81 transitions. [2023-12-20 00:01:10,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2023-12-20 00:01:10,231 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 00:01:10,232 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 00:01:10,256 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-12-20 00:01:10,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 00:01:10,449 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 00:01:10,449 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 00:01:10,449 INFO L85 PathProgramCache]: Analyzing trace with hash 675382542, now seen corresponding path program 23 times [2023-12-20 00:01:10,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 00:01:10,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172665392] [2023-12-20 00:01:10,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 00:01:10,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 00:01:10,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:01:10,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-20 00:01:10,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:01:10,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 00:01:10,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:01:10,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 00:01:10,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:01:11,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 00:01:11,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:01:11,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 00:01:11,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:01:11,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 00:01:11,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:01:11,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 00:01:11,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:01:11,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 00:01:11,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:01:11,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 00:01:11,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:01:11,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 00:01:11,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:01:11,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 00:01:11,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:01:11,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 00:01:11,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:01:11,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 00:01:11,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:01:11,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 00:01:11,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:01:11,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 00:01:11,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:01:11,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 00:01:11,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:01:11,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 00:01:11,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:01:11,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 00:01:11,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:01:12,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 00:01:12,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:01:12,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 00:01:12,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:01:12,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 00:01:12,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:01:12,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 00:01:12,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:01:12,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 00:01:12,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:01:12,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 00:01:12,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:01:12,173 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 828 refuted. 0 times theorem prover too weak. 782 trivial. 0 not checked. [2023-12-20 00:01:12,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 00:01:12,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172665392] [2023-12-20 00:01:12,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172665392] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 00:01:12,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774059617] [2023-12-20 00:01:12,174 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-20 00:01:12,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 00:01:12,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 00:01:12,176 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 00:01:12,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-12-20 00:01:16,024 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2023-12-20 00:01:16,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 00:01:16,025 INFO L262 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 50 conjunts are in the unsatisfiable core [2023-12-20 00:01:16,028 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 00:01:16,176 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2023-12-20 00:01:16,177 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 00:02:06,303 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 1334 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2023-12-20 00:02:06,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774059617] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 00:02:06,304 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 00:02:06,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 51] total 56 [2023-12-20 00:02:06,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897018280] [2023-12-20 00:02:06,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 00:02:06,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2023-12-20 00:02:06,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 00:02:06,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2023-12-20 00:02:06,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=809, Invalid=2271, Unknown=0, NotChecked=0, Total=3080 [2023-12-20 00:02:06,306 INFO L87 Difference]: Start difference. First operand 80 states and 81 transitions. Second operand has 56 states, 54 states have (on average 2.0) internal successors, (108), 55 states have internal predecessors, (108), 27 states have call successors, (27), 1 states have call predecessors, (27), 25 states have return successors, (71), 24 states have call predecessors, (71), 27 states have call successors, (71) [2023-12-20 00:02:06,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 00:02:06,548 INFO L93 Difference]: Finished difference Result 87 states and 88 transitions. [2023-12-20 00:02:06,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-12-20 00:02:06,548 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 54 states have (on average 2.0) internal successors, (108), 55 states have internal predecessors, (108), 27 states have call successors, (27), 1 states have call predecessors, (27), 25 states have return successors, (71), 24 states have call predecessors, (71), 27 states have call successors, (71) Word has length 147 [2023-12-20 00:02:06,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 00:02:06,550 INFO L225 Difference]: With dead ends: 87 [2023-12-20 00:02:06,550 INFO L226 Difference]: Without dead ends: 83 [2023-12-20 00:02:06,551 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 390 GetRequests, 288 SyntacticMatches, 24 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2727 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2082, Invalid=4238, Unknown=0, NotChecked=0, Total=6320 [2023-12-20 00:02:06,552 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 211 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 00:02:06,552 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [237 Valid, 148 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 00:02:06,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2023-12-20 00:02:06,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2023-12-20 00:02:06,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 55 states have (on average 1.018181818181818) internal successors, (56), 56 states have internal predecessors, (56), 2 states have call successors, (2), 1 states have call predecessors, (2), 25 states have return successors, (26), 25 states have call predecessors, (26), 2 states have call successors, (26) [2023-12-20 00:02:06,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 84 transitions. [2023-12-20 00:02:06,555 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 84 transitions. Word has length 147 [2023-12-20 00:02:06,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 00:02:06,555 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 84 transitions. [2023-12-20 00:02:06,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 54 states have (on average 2.0) internal successors, (108), 55 states have internal predecessors, (108), 27 states have call successors, (27), 1 states have call predecessors, (27), 25 states have return successors, (71), 24 states have call predecessors, (71), 27 states have call successors, (71) [2023-12-20 00:02:06,556 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 84 transitions. [2023-12-20 00:02:06,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2023-12-20 00:02:06,556 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 00:02:06,556 INFO L195 NwaCegarLoop]: trace histogram [25, 25, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 00:02:06,581 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-12-20 00:02:06,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 00:02:06,770 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 00:02:06,770 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 00:02:06,770 INFO L85 PathProgramCache]: Analyzing trace with hash 1206824132, now seen corresponding path program 24 times [2023-12-20 00:02:06,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 00:02:06,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858563532] [2023-12-20 00:02:06,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 00:02:06,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 00:02:06,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:02:06,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-20 00:02:06,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:02:07,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 00:02:07,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:02:07,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 00:02:07,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:02:07,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 00:02:07,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:02:07,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 00:02:07,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:02:07,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 00:02:07,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:02:07,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 00:02:07,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:02:07,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 00:02:07,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:02:07,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 00:02:07,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:02:08,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 00:02:08,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:02:08,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 00:02:08,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:02:08,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 00:02:08,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:02:08,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 00:02:08,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:02:08,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 00:02:08,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:02:08,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 00:02:08,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:02:08,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 00:02:08,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:02:08,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 00:02:08,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:02:08,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 00:02:08,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:02:08,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 00:02:08,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:02:08,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 00:02:08,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:02:08,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 00:02:08,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:02:08,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 00:02:08,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:02:08,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 00:02:08,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:02:08,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 00:02:08,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:02:08,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 00:02:08,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:02:08,651 INFO L134 CoverageAnalysis]: Checked inductivity of 1752 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 852 trivial. 0 not checked. [2023-12-20 00:02:08,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 00:02:08,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858563532] [2023-12-20 00:02:08,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858563532] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 00:02:08,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651676733] [2023-12-20 00:02:08,669 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-20 00:02:08,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 00:02:08,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 00:02:08,671 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 00:02:08,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-12-20 00:02:13,227 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2023-12-20 00:02:13,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 00:02:13,229 INFO L262 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 52 conjunts are in the unsatisfiable core [2023-12-20 00:02:13,231 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 00:02:13,383 INFO L134 CoverageAnalysis]: Checked inductivity of 1752 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2023-12-20 00:02:13,383 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 00:03:05,384 INFO L134 CoverageAnalysis]: Checked inductivity of 1752 backedges. 0 proven. 1452 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2023-12-20 00:03:05,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651676733] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 00:03:05,385 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 00:03:05,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 53] total 57 [2023-12-20 00:03:05,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127928742] [2023-12-20 00:03:05,386 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 00:03:05,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2023-12-20 00:03:05,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 00:03:05,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2023-12-20 00:03:05,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=864, Invalid=2328, Unknown=0, NotChecked=0, Total=3192 [2023-12-20 00:03:05,392 INFO L87 Difference]: Start difference. First operand 83 states and 84 transitions. Second operand has 57 states, 56 states have (on average 1.9821428571428572) internal successors, (111), 56 states have internal predecessors, (111), 27 states have call successors, (27), 1 states have call predecessors, (27), 26 states have return successors, (73), 25 states have call predecessors, (73), 27 states have call successors, (73) [2023-12-20 00:03:05,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 00:03:05,592 INFO L93 Difference]: Finished difference Result 90 states and 91 transitions. [2023-12-20 00:03:05,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-12-20 00:03:05,592 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 56 states have (on average 1.9821428571428572) internal successors, (111), 56 states have internal predecessors, (111), 27 states have call successors, (27), 1 states have call predecessors, (27), 26 states have return successors, (73), 25 states have call predecessors, (73), 27 states have call successors, (73) Word has length 153 [2023-12-20 00:03:05,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 00:03:05,593 INFO L225 Difference]: With dead ends: 90 [2023-12-20 00:03:05,600 INFO L226 Difference]: Without dead ends: 86 [2023-12-20 00:03:05,601 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 406 GetRequests, 300 SyntacticMatches, 26 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2875 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=2240, Invalid=4402, Unknown=0, NotChecked=0, Total=6642 [2023-12-20 00:03:05,602 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 107 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 00:03:05,606 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 137 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 00:03:05,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2023-12-20 00:03:05,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2023-12-20 00:03:05,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 57 states have (on average 1.0175438596491229) internal successors, (58), 58 states have internal predecessors, (58), 2 states have call successors, (2), 1 states have call predecessors, (2), 26 states have return successors, (27), 26 states have call predecessors, (27), 2 states have call successors, (27) [2023-12-20 00:03:05,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 87 transitions. [2023-12-20 00:03:05,612 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 87 transitions. Word has length 153 [2023-12-20 00:03:05,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 00:03:05,613 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 87 transitions. [2023-12-20 00:03:05,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 56 states have (on average 1.9821428571428572) internal successors, (111), 56 states have internal predecessors, (111), 27 states have call successors, (27), 1 states have call predecessors, (27), 26 states have return successors, (73), 25 states have call predecessors, (73), 27 states have call successors, (73) [2023-12-20 00:03:05,618 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 87 transitions. [2023-12-20 00:03:05,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2023-12-20 00:03:05,618 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 00:03:05,618 INFO L195 NwaCegarLoop]: trace histogram [26, 26, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 00:03:05,647 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-12-20 00:03:05,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-12-20 00:03:05,842 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 00:03:05,842 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 00:03:05,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1687538610, now seen corresponding path program 25 times [2023-12-20 00:03:05,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 00:03:05,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515322031] [2023-12-20 00:03:05,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 00:03:05,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 00:03:05,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:03:06,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-20 00:03:06,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:03:06,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 00:03:06,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:03:06,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 00:03:06,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:03:06,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 00:03:06,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:03:07,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 00:03:07,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:03:07,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 00:03:07,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:03:07,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 00:03:07,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:03:07,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 00:03:07,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:03:07,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 00:03:07,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:03:07,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 00:03:07,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:03:07,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 00:03:07,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:03:07,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 00:03:07,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:03:07,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 00:03:07,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:03:08,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 00:03:08,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:03:08,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 00:03:08,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:03:08,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 00:03:08,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:03:08,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 00:03:08,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:03:08,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 00:03:08,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:03:08,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 00:03:08,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:03:08,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 00:03:08,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:03:08,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 00:03:08,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:03:08,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 00:03:08,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:03:08,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 00:03:08,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:03:08,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 00:03:08,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:03:08,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 00:03:08,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:03:08,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 00:03:08,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:03:09,038 INFO L134 CoverageAnalysis]: Checked inductivity of 1900 backedges. 25 proven. 950 refuted. 0 times theorem prover too weak. 925 trivial. 0 not checked. [2023-12-20 00:03:09,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 00:03:09,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515322031] [2023-12-20 00:03:09,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515322031] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 00:03:09,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496461916] [2023-12-20 00:03:09,038 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-20 00:03:09,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 00:03:09,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 00:03:09,040 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 00:03:09,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-12-20 00:03:14,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:03:14,247 INFO L262 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 107 conjunts are in the unsatisfiable core [2023-12-20 00:03:14,250 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 00:03:14,366 INFO L134 CoverageAnalysis]: Checked inductivity of 1900 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2023-12-20 00:03:14,366 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 00:03:16,236 INFO L134 CoverageAnalysis]: Checked inductivity of 1900 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2023-12-20 00:03:16,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496461916] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 00:03:16,236 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 00:03:16,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 55, 55] total 57 [2023-12-20 00:03:16,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976468329] [2023-12-20 00:03:16,237 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 00:03:16,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2023-12-20 00:03:16,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 00:03:16,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2023-12-20 00:03:16,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=3080, Unknown=0, NotChecked=0, Total=3192 [2023-12-20 00:03:16,238 INFO L87 Difference]: Start difference. First operand 86 states and 87 transitions. Second operand has 57 states, 57 states have (on average 1.0701754385964912) internal successors, (61), 31 states have internal predecessors, (61), 1 states have call successors, (2), 1 states have call predecessors, (2), 27 states have return successors, (27), 26 states have call predecessors, (27), 1 states have call successors, (27) [2023-12-20 00:03:18,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 00:03:18,292 INFO L93 Difference]: Finished difference Result 93 states and 94 transitions. [2023-12-20 00:03:18,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2023-12-20 00:03:18,292 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.0701754385964912) internal successors, (61), 31 states have internal predecessors, (61), 1 states have call successors, (2), 1 states have call predecessors, (2), 27 states have return successors, (27), 26 states have call predecessors, (27), 1 states have call successors, (27) Word has length 159 [2023-12-20 00:03:18,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 00:03:18,293 INFO L225 Difference]: With dead ends: 93 [2023-12-20 00:03:18,293 INFO L226 Difference]: Without dead ends: 89 [2023-12-20 00:03:18,295 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 474 GetRequests, 368 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1275 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=317, Invalid=11239, Unknown=0, NotChecked=0, Total=11556 [2023-12-20 00:03:18,295 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 55 mSDsluCounter, 1592 mSDsCounter, 0 mSdLazyCounter, 3090 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 1623 SdHoareTripleChecker+Invalid, 3090 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3090 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-12-20 00:03:18,295 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 1623 Invalid, 3090 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3090 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-12-20 00:03:18,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2023-12-20 00:03:18,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2023-12-20 00:03:18,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 59 states have (on average 1.0169491525423728) internal successors, (60), 60 states have internal predecessors, (60), 2 states have call successors, (2), 1 states have call predecessors, (2), 27 states have return successors, (28), 27 states have call predecessors, (28), 2 states have call successors, (28) [2023-12-20 00:03:18,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2023-12-20 00:03:18,297 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 159 [2023-12-20 00:03:18,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 00:03:18,297 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2023-12-20 00:03:18,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.0701754385964912) internal successors, (61), 31 states have internal predecessors, (61), 1 states have call successors, (2), 1 states have call predecessors, (2), 27 states have return successors, (27), 26 states have call predecessors, (27), 1 states have call successors, (27) [2023-12-20 00:03:18,298 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2023-12-20 00:03:18,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2023-12-20 00:03:18,298 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 00:03:18,298 INFO L195 NwaCegarLoop]: trace histogram [27, 27, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 00:03:18,337 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-12-20 00:03:18,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-12-20 00:03:18,512 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 00:03:18,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 00:03:18,513 INFO L85 PathProgramCache]: Analyzing trace with hash -119727228, now seen corresponding path program 26 times [2023-12-20 00:03:18,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 00:03:18,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615695360] [2023-12-20 00:03:18,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 00:03:18,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 00:03:18,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:03:18,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-20 00:03:18,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:03:18,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 00:03:18,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:03:19,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 00:03:19,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:03:19,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 00:03:19,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:03:19,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 00:03:19,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:03:19,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 00:03:19,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:03:19,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 00:03:19,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:03:19,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 00:03:19,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:03:19,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 00:03:19,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:03:20,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 00:03:20,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:03:20,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 00:03:20,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:03:20,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 00:03:20,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:03:20,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 00:03:20,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:03:20,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 00:03:20,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:03:20,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 00:03:20,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:03:20,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 00:03:20,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:03:20,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 00:03:20,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:03:20,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 00:03:20,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:03:20,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 00:03:20,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:03:20,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 00:03:20,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:03:20,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 00:03:20,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:03:20,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 00:03:20,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:03:20,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 00:03:20,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:03:20,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 00:03:20,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:03:20,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 00:03:20,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:03:20,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 00:03:20,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:03:20,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 00:03:20,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:03:20,841 INFO L134 CoverageAnalysis]: Checked inductivity of 2054 backedges. 975 proven. 78 refuted. 0 times theorem prover too weak. 1001 trivial. 0 not checked. [2023-12-20 00:03:20,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 00:03:20,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615695360] [2023-12-20 00:03:20,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615695360] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 00:03:20,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377594999] [2023-12-20 00:03:20,841 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-20 00:03:20,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 00:03:20,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 00:03:20,842 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 00:03:20,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-12-20 00:03:26,030 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-20 00:03:26,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 00:03:26,032 INFO L262 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 56 conjunts are in the unsatisfiable core [2023-12-20 00:03:26,034 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 00:03:26,207 INFO L134 CoverageAnalysis]: Checked inductivity of 2054 backedges. 1027 proven. 0 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2023-12-20 00:03:26,207 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-20 00:03:26,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377594999] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 00:03:26,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-20 00:03:26,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [32] total 34 [2023-12-20 00:03:26,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686409004] [2023-12-20 00:03:26,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 00:03:26,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-12-20 00:03:26,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 00:03:26,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-12-20 00:03:26,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=420, Invalid=702, Unknown=0, NotChecked=0, Total=1122 [2023-12-20 00:03:26,209 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand has 31 states, 30 states have (on average 2.0) internal successors, (60), 30 states have internal predecessors, (60), 2 states have call successors, (2), 1 states have call predecessors, (2), 27 states have return successors, (27), 27 states have call predecessors, (27), 2 states have call successors, (27) [2023-12-20 00:03:26,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 00:03:26,656 INFO L93 Difference]: Finished difference Result 89 states and 90 transitions. [2023-12-20 00:03:26,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-12-20 00:03:26,656 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 30 states have internal predecessors, (60), 2 states have call successors, (2), 1 states have call predecessors, (2), 27 states have return successors, (27), 27 states have call predecessors, (27), 2 states have call successors, (27) Word has length 165 [2023-12-20 00:03:26,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 00:03:26,656 INFO L225 Difference]: With dead ends: 89 [2023-12-20 00:03:26,656 INFO L226 Difference]: Without dead ends: 0 [2023-12-20 00:03:26,657 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1230, Invalid=2430, Unknown=0, NotChecked=0, Total=3660 [2023-12-20 00:03:26,657 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 3 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 00:03:26,658 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 330 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 00:03:26,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-12-20 00:03:26,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-12-20 00:03:26,658 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) [2023-12-20 00:03:26,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-12-20 00:03:26,658 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 165 [2023-12-20 00:03:26,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 00:03:26,658 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-12-20 00:03:26,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 30 states have internal predecessors, (60), 2 states have call successors, (2), 1 states have call predecessors, (2), 27 states have return successors, (27), 27 states have call predecessors, (27), 2 states have call successors, (27) [2023-12-20 00:03:26,658 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-12-20 00:03:26,658 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-12-20 00:03:26,662 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-20 00:03:26,693 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2023-12-20 00:03:26,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-12-20 00:03:26,895 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2023-12-20 00:03:26,939 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2023-12-20 00:03:26,939 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 15) no Hoare annotation was computed. [2023-12-20 00:03:26,939 INFO L899 garLoopResultBuilder]: For program point L15(line 15) no Hoare annotation was computed. [2023-12-20 00:03:26,939 INFO L899 garLoopResultBuilder]: For program point L14(lines 14 16) no Hoare annotation was computed. [2023-12-20 00:03:26,940 INFO L895 garLoopResultBuilder]: At program point L13(line 13) the Hoare annotation is: (= |ULTIMATE.start_main_~input~0#1| 25) [2023-12-20 00:03:26,940 INFO L899 garLoopResultBuilder]: For program point L13-1(line 13) no Hoare annotation was computed. [2023-12-20 00:03:26,940 INFO L899 garLoopResultBuilder]: For program point L11(lines 11 17) no Hoare annotation was computed. [2023-12-20 00:03:26,940 INFO L899 garLoopResultBuilder]: For program point $Ultimate##0(line -1) no Hoare annotation was computed. [2023-12-20 00:03:26,940 INFO L899 garLoopResultBuilder]: For program point idFINAL(lines 6 9) no Hoare annotation was computed. [2023-12-20 00:03:26,940 INFO L899 garLoopResultBuilder]: For program point idEXIT(lines 6 9) no Hoare annotation was computed. [2023-12-20 00:03:26,940 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 6 9) the Hoare annotation is: true [2023-12-20 00:03:26,940 INFO L895 garLoopResultBuilder]: At program point L8(line 8) the Hoare annotation is: (= |id_#in~x| id_~x) [2023-12-20 00:03:26,940 INFO L899 garLoopResultBuilder]: For program point L7(line 7) no Hoare annotation was computed. [2023-12-20 00:03:26,940 INFO L899 garLoopResultBuilder]: For program point L8-1(line 8) no Hoare annotation was computed. [2023-12-20 00:03:26,951 INFO L445 BasicCegarLoop]: Path program histogram: [26, 1] [2023-12-20 00:03:26,954 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-12-20 00:03:26,956 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.12 12:03:26 BoogieIcfgContainer [2023-12-20 00:03:26,956 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-20 00:03:26,956 INFO L158 Benchmark]: Toolchain (without parser) took 411486.89ms. Allocated memory was 303.0MB in the beginning and 1.1GB in the end (delta: 844.1MB). Free memory was 262.4MB in the beginning and 617.9MB in the end (delta: -355.5MB). Peak memory consumption was 488.1MB. Max. memory is 8.0GB. [2023-12-20 00:03:26,957 INFO L158 Benchmark]: CDTParser took 0.41ms. Allocated memory is still 202.4MB. Free memory is still 149.8MB. There was no memory consumed. Max. memory is 8.0GB. [2023-12-20 00:03:26,957 INFO L158 Benchmark]: CACSL2BoogieTranslator took 154.90ms. Allocated memory is still 303.0MB. Free memory was 261.9MB in the beginning and 251.4MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2023-12-20 00:03:26,957 INFO L158 Benchmark]: Boogie Procedure Inliner took 19.36ms. Allocated memory is still 303.0MB. Free memory was 251.4MB in the beginning and 250.4MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-12-20 00:03:26,957 INFO L158 Benchmark]: Boogie Preprocessor took 24.68ms. Allocated memory is still 303.0MB. Free memory was 250.4MB in the beginning and 248.8MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-20 00:03:26,957 INFO L158 Benchmark]: RCFGBuilder took 206.86ms. Allocated memory is still 303.0MB. Free memory was 248.8MB in the beginning and 238.9MB in the end (delta: 10.0MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2023-12-20 00:03:26,957 INFO L158 Benchmark]: TraceAbstraction took 411075.32ms. Allocated memory was 303.0MB in the beginning and 1.1GB in the end (delta: 844.1MB). Free memory was 237.8MB in the beginning and 617.9MB in the end (delta: -380.1MB). Peak memory consumption was 464.0MB. Max. memory is 8.0GB. [2023-12-20 00:03:26,958 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.41ms. Allocated memory is still 202.4MB. Free memory is still 149.8MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 154.90ms. Allocated memory is still 303.0MB. Free memory was 261.9MB in the beginning and 251.4MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 19.36ms. Allocated memory is still 303.0MB. Free memory was 251.4MB in the beginning and 250.4MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 24.68ms. Allocated memory is still 303.0MB. Free memory was 250.4MB in the beginning and 248.8MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 206.86ms. Allocated memory is still 303.0MB. Free memory was 248.8MB in the beginning and 238.9MB in the end (delta: 10.0MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * TraceAbstraction took 411075.32ms. Allocated memory was 303.0MB in the beginning and 1.1GB in the end (delta: 844.1MB). Free memory was 237.8MB in the beginning and 617.9MB in the end (delta: -380.1MB). Peak memory consumption was 464.0MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 15]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 14 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 411.0s, OverallIterations: 27, TraceHistogramMax: 27, PathProgramHistogramMax: 26, EmptinessCheckTime: 0.0s, AutomataDifference: 6.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 3095 SdHoareTripleChecker+Valid, 2.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2692 mSDsluCounter, 4100 SdHoareTripleChecker+Invalid, 2.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 3812 mSDsCounter, 1011 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 5561 IncrementalHoareTripleChecker+Invalid, 6572 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1011 mSolverCounterUnsat, 288 mSDtfsCounter, 5561 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 6082 GetRequests, 4473 SyntacticMatches, 325 SemanticMatches, 1284 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28016 ImplicationChecksByTransitivity, 12.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=89occurred in iteration=26, InterpolantAutomatonStates: 512, 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, 27 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 5 PreInvPairs, 5 NumberOfFragments, 7 HoareAnnotationTreeSize, 5 FormulaSimplifications, 12 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FormulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 362.1s InterpolantComputationTime, 4689 NumberOfCodeBlocks, 4689 NumberOfCodeBlocksAsserted, 226 NumberOfCheckSat, 6786 ConstructedInterpolants, 0 QuantifiedInterpolants, 19986 SizeOfPredicates, 351 NumberOfNonLiveVariables, 6006 ConjunctsInSsa, 859 ConjunctsInUnsatCore, 78 InterpolantComputations, 2 PerfectInterpolantSequences, 24180/54808 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-12-20 00:03:27,070 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...