/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/array-examples/sorting_bubblesort_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-18 16:18:33,435 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-18 16:18:33,505 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-12-18 16:18:33,508 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-18 16:18:33,508 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-18 16:18:33,528 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-18 16:18:33,529 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-18 16:18:33,529 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-18 16:18:33,530 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-18 16:18:33,532 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-18 16:18:33,533 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-18 16:18:33,533 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-18 16:18:33,533 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-18 16:18:33,534 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-18 16:18:33,534 INFO L153 SettingsManager]: * Use SBE=true [2023-12-18 16:18:33,534 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-18 16:18:33,534 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-18 16:18:33,535 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-18 16:18:33,535 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-18 16:18:33,535 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-18 16:18:33,535 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-18 16:18:33,536 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-18 16:18:33,536 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-18 16:18:33,536 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-18 16:18:33,536 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-18 16:18:33,536 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-18 16:18:33,536 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-18 16:18:33,537 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-18 16:18:33,537 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-18 16:18:33,537 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-18 16:18:33,538 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-18 16:18:33,538 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-18 16:18:33,538 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-18 16:18:33,538 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-18 16:18:33,538 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-18 16:18:33,538 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-18 16:18:33,538 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-18 16:18:33,539 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-18 16:18:33,539 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-18 16:18:33,539 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-18 16:18:33,539 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-18 16:18:33,539 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-18 16:18:33,539 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-18 16:18:33,539 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> true [2023-12-18 16:18:33,730 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-18 16:18:33,755 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-18 16:18:33,757 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-18 16:18:33,758 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-18 16:18:33,759 INFO L274 PluginConnector]: CDTParser initialized [2023-12-18 16:18:33,759 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/sorting_bubblesort_ground-1.i [2023-12-18 16:18:34,810 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-18 16:18:34,979 INFO L384 CDTParser]: Found 1 translation units. [2023-12-18 16:18:34,979 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/sorting_bubblesort_ground-1.i [2023-12-18 16:18:34,984 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c5dabca53/2367fac9cbea4dc7b48d364b4795b102/FLAG1e8e5a95b [2023-12-18 16:18:35,410 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c5dabca53/2367fac9cbea4dc7b48d364b4795b102 [2023-12-18 16:18:35,413 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-18 16:18:35,414 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-18 16:18:35,416 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-18 16:18:35,417 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-18 16:18:35,421 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-18 16:18:35,421 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 04:18:35" (1/1) ... [2023-12-18 16:18:35,422 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@277ab62f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 04:18:35, skipping insertion in model container [2023-12-18 16:18:35,422 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 04:18:35" (1/1) ... [2023-12-18 16:18:35,436 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-18 16:18:35,535 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-examples/sorting_bubblesort_ground-1.i[820,833] [2023-12-18 16:18:35,548 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-18 16:18:35,554 INFO L202 MainTranslator]: Completed pre-run [2023-12-18 16:18:35,563 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-examples/sorting_bubblesort_ground-1.i[820,833] [2023-12-18 16:18:35,568 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-18 16:18:35,577 INFO L206 MainTranslator]: Completed translation [2023-12-18 16:18:35,578 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 04:18:35 WrapperNode [2023-12-18 16:18:35,578 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-18 16:18:35,579 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-18 16:18:35,579 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-18 16:18:35,579 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-18 16:18:35,583 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 04:18:35" (1/1) ... [2023-12-18 16:18:35,587 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 04:18:35" (1/1) ... [2023-12-18 16:18:35,600 INFO L138 Inliner]: procedures = 16, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 85 [2023-12-18 16:18:35,600 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-18 16:18:35,601 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-18 16:18:35,601 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-18 16:18:35,601 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-18 16:18:35,608 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 04:18:35" (1/1) ... [2023-12-18 16:18:35,608 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 04:18:35" (1/1) ... [2023-12-18 16:18:35,609 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 04:18:35" (1/1) ... [2023-12-18 16:18:35,619 INFO L175 MemorySlicer]: Split 11 memory accesses to 2 slices as follows [2, 9]. 82 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 3 writes are split as follows [0, 3]. [2023-12-18 16:18:35,619 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 04:18:35" (1/1) ... [2023-12-18 16:18:35,619 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 04:18:35" (1/1) ... [2023-12-18 16:18:35,622 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 04:18:35" (1/1) ... [2023-12-18 16:18:35,625 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 04:18:35" (1/1) ... [2023-12-18 16:18:35,626 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 04:18:35" (1/1) ... [2023-12-18 16:18:35,627 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 04:18:35" (1/1) ... [2023-12-18 16:18:35,628 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-18 16:18:35,628 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-18 16:18:35,629 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-18 16:18:35,629 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-18 16:18:35,629 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 04:18:35" (1/1) ... [2023-12-18 16:18:35,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-18 16:18:35,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 16:18:35,673 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) [2023-12-18 16:18:35,692 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 [2023-12-18 16:18:35,714 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-18 16:18:35,714 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-18 16:18:35,714 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-12-18 16:18:35,714 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-18 16:18:35,714 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-12-18 16:18:35,715 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-12-18 16:18:35,716 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-18 16:18:35,716 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-18 16:18:35,717 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-12-18 16:18:35,717 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-12-18 16:18:35,717 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-18 16:18:35,795 INFO L241 CfgBuilder]: Building ICFG [2023-12-18 16:18:35,796 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-18 16:18:35,932 INFO L282 CfgBuilder]: Performing block encoding [2023-12-18 16:18:35,960 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-18 16:18:35,960 INFO L309 CfgBuilder]: Removed 5 assume(true) statements. [2023-12-18 16:18:35,960 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 04:18:35 BoogieIcfgContainer [2023-12-18 16:18:35,960 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-18 16:18:35,962 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-18 16:18:35,962 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-18 16:18:35,964 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-18 16:18:35,964 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.12 04:18:35" (1/3) ... [2023-12-18 16:18:35,965 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7404d4cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 04:18:35, skipping insertion in model container [2023-12-18 16:18:35,965 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 04:18:35" (2/3) ... [2023-12-18 16:18:35,965 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7404d4cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 04:18:35, skipping insertion in model container [2023-12-18 16:18:35,965 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 04:18:35" (3/3) ... [2023-12-18 16:18:35,966 INFO L112 eAbstractionObserver]: Analyzing ICFG sorting_bubblesort_ground-1.i [2023-12-18 16:18:35,978 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-18 16:18:35,978 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-18 16:18:36,008 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-18 16:18:36,013 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;@5edda7c4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-18 16:18:36,013 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-18 16:18:36,016 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 16 states have (on average 1.8125) internal successors, (29), 17 states have internal predecessors, (29), 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) [2023-12-18 16:18:36,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-12-18 16:18:36,019 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 16:18:36,020 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 16:18:36,020 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 16:18:36,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 16:18:36,024 INFO L85 PathProgramCache]: Analyzing trace with hash 1612111142, now seen corresponding path program 1 times [2023-12-18 16:18:36,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 16:18:36,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791067839] [2023-12-18 16:18:36,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 16:18:36,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 16:18:36,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 16:18:36,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 16:18:36,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 16:18:36,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791067839] [2023-12-18 16:18:36,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791067839] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-18 16:18:36,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-18 16:18:36,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-18 16:18:36,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322838448] [2023-12-18 16:18:36,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-18 16:18:36,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-18 16:18:36,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 16:18:36,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-18 16:18:36,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-18 16:18:36,253 INFO L87 Difference]: Start difference. First operand has 18 states, 16 states have (on average 1.8125) internal successors, (29), 17 states have internal predecessors, (29), 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) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 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) [2023-12-18 16:18:36,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 16:18:36,292 INFO L93 Difference]: Finished difference Result 35 states and 57 transitions. [2023-12-18 16:18:36,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-18 16:18:36,294 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 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) Word has length 9 [2023-12-18 16:18:36,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 16:18:36,299 INFO L225 Difference]: With dead ends: 35 [2023-12-18 16:18:36,300 INFO L226 Difference]: Without dead ends: 17 [2023-12-18 16:18:36,301 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-18 16:18:36,305 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 0 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 16:18:36,307 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 16:18:36,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-12-18 16:18:36,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2023-12-18 16:18:36,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.375) internal successors, (22), 16 states have internal predecessors, (22), 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) [2023-12-18 16:18:36,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 22 transitions. [2023-12-18 16:18:36,337 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 22 transitions. Word has length 9 [2023-12-18 16:18:36,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 16:18:36,337 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 22 transitions. [2023-12-18 16:18:36,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 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) [2023-12-18 16:18:36,337 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 22 transitions. [2023-12-18 16:18:36,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-12-18 16:18:36,338 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 16:18:36,338 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 16:18:36,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-18 16:18:36,339 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 16:18:36,339 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 16:18:36,339 INFO L85 PathProgramCache]: Analyzing trace with hash -1371244853, now seen corresponding path program 1 times [2023-12-18 16:18:36,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 16:18:36,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935275144] [2023-12-18 16:18:36,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 16:18:36,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 16:18:36,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 16:18:36,438 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 16:18:36,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 16:18:36,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935275144] [2023-12-18 16:18:36,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935275144] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 16:18:36,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044417764] [2023-12-18 16:18:36,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 16:18:36,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 16:18:36,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 16:18:36,479 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) [2023-12-18 16:18:36,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-18 16:18:36,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 16:18:36,528 INFO L262 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-18 16:18:36,533 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 16:18:36,552 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-18 16:18:36,552 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-18 16:18:36,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044417764] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-18 16:18:36,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-18 16:18:36,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-12-18 16:18:36,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075935120] [2023-12-18 16:18:36,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-18 16:18:36,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-18 16:18:36,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 16:18:36,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-18 16:18:36,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-18 16:18:36,556 INFO L87 Difference]: Start difference. First operand 17 states and 22 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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) [2023-12-18 16:18:36,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 16:18:36,582 INFO L93 Difference]: Finished difference Result 30 states and 39 transitions. [2023-12-18 16:18:36,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-18 16:18:36,583 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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) Word has length 10 [2023-12-18 16:18:36,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 16:18:36,584 INFO L225 Difference]: With dead ends: 30 [2023-12-18 16:18:36,585 INFO L226 Difference]: Without dead ends: 22 [2023-12-18 16:18:36,585 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-18 16:18:36,588 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 5 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 16:18:36,588 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 36 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 16:18:36,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-12-18 16:18:36,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-12-18 16:18:36,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 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) [2023-12-18 16:18:36,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 29 transitions. [2023-12-18 16:18:36,596 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 29 transitions. Word has length 10 [2023-12-18 16:18:36,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 16:18:36,597 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 29 transitions. [2023-12-18 16:18:36,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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) [2023-12-18 16:18:36,598 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 29 transitions. [2023-12-18 16:18:36,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-12-18 16:18:36,598 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 16:18:36,599 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 16:18:36,607 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-18 16:18:36,804 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 [2023-12-18 16:18:36,805 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 16:18:36,806 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 16:18:36,806 INFO L85 PathProgramCache]: Analyzing trace with hash 810154115, now seen corresponding path program 1 times [2023-12-18 16:18:36,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 16:18:36,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124083096] [2023-12-18 16:18:36,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 16:18:36,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 16:18:36,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 16:18:36,880 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-18 16:18:36,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 16:18:36,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124083096] [2023-12-18 16:18:36,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124083096] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 16:18:36,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208944761] [2023-12-18 16:18:36,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 16:18:36,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 16:18:36,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 16:18:36,883 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) [2023-12-18 16:18:36,890 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-18 16:18:36,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 16:18:36,970 INFO L262 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-18 16:18:36,972 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 16:18:36,980 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-18 16:18:36,980 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-18 16:18:36,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208944761] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-18 16:18:36,981 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-18 16:18:36,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-12-18 16:18:36,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084823320] [2023-12-18 16:18:36,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-18 16:18:36,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-18 16:18:36,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 16:18:36,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-18 16:18:36,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-18 16:18:36,982 INFO L87 Difference]: Start difference. First operand 22 states and 29 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 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) [2023-12-18 16:18:37,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 16:18:37,008 INFO L93 Difference]: Finished difference Result 44 states and 59 transitions. [2023-12-18 16:18:37,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-18 16:18:37,009 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 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) Word has length 13 [2023-12-18 16:18:37,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 16:18:37,010 INFO L225 Difference]: With dead ends: 44 [2023-12-18 16:18:37,010 INFO L226 Difference]: Without dead ends: 26 [2023-12-18 16:18:37,011 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-18 16:18:37,013 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 3 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 16:18:37,014 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 27 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 16:18:37,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-12-18 16:18:37,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2023-12-18 16:18:37,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 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) [2023-12-18 16:18:37,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 30 transitions. [2023-12-18 16:18:37,018 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 30 transitions. Word has length 13 [2023-12-18 16:18:37,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 16:18:37,019 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 30 transitions. [2023-12-18 16:18:37,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 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) [2023-12-18 16:18:37,019 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 30 transitions. [2023-12-18 16:18:37,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-12-18 16:18:37,020 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 16:18:37,021 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 16:18:37,038 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-18 16:18:37,236 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 [2023-12-18 16:18:37,237 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 16:18:37,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 16:18:37,237 INFO L85 PathProgramCache]: Analyzing trace with hash -1552667997, now seen corresponding path program 1 times [2023-12-18 16:18:37,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 16:18:37,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805103816] [2023-12-18 16:18:37,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 16:18:37,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 16:18:37,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 16:18:37,298 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-18 16:18:37,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 16:18:37,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805103816] [2023-12-18 16:18:37,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805103816] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 16:18:37,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836278886] [2023-12-18 16:18:37,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 16:18:37,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 16:18:37,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 16:18:37,310 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) [2023-12-18 16:18:37,328 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-18 16:18:37,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 16:18:37,353 INFO L262 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-18 16:18:37,355 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 16:18:37,379 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-18 16:18:37,380 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 16:18:37,394 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-18 16:18:37,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836278886] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 16:18:37,395 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 16:18:37,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-12-18 16:18:37,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508464938] [2023-12-18 16:18:37,395 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 16:18:37,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-18 16:18:37,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 16:18:37,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-18 16:18:37,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-12-18 16:18:37,396 INFO L87 Difference]: Start difference. First operand 23 states and 30 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 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) [2023-12-18 16:18:37,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 16:18:37,409 INFO L93 Difference]: Finished difference Result 46 states and 62 transitions. [2023-12-18 16:18:37,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-18 16:18:37,410 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 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) Word has length 16 [2023-12-18 16:18:37,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 16:18:37,410 INFO L225 Difference]: With dead ends: 46 [2023-12-18 16:18:37,410 INFO L226 Difference]: Without dead ends: 26 [2023-12-18 16:18:37,410 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-12-18 16:18:37,411 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 16:18:37,411 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 50 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 16:18:37,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-12-18 16:18:37,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2023-12-18 16:18:37,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.32) internal successors, (33), 25 states have internal predecessors, (33), 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) [2023-12-18 16:18:37,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2023-12-18 16:18:37,413 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 16 [2023-12-18 16:18:37,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 16:18:37,414 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2023-12-18 16:18:37,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 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) [2023-12-18 16:18:37,414 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2023-12-18 16:18:37,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-12-18 16:18:37,414 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 16:18:37,414 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 16:18:37,421 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-18 16:18:37,619 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 [2023-12-18 16:18:37,619 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 16:18:37,619 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 16:18:37,619 INFO L85 PathProgramCache]: Analyzing trace with hash -190909954, now seen corresponding path program 2 times [2023-12-18 16:18:37,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 16:18:37,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57749607] [2023-12-18 16:18:37,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 16:18:37,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 16:18:37,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 16:18:37,669 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-18 16:18:37,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 16:18:37,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57749607] [2023-12-18 16:18:37,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57749607] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 16:18:37,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976212479] [2023-12-18 16:18:37,670 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-18 16:18:37,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 16:18:37,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 16:18:37,729 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) [2023-12-18 16:18:37,731 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-18 16:18:37,773 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-18 16:18:37,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 16:18:37,773 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-18 16:18:37,774 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 16:18:37,803 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-18 16:18:37,803 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 16:18:37,849 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-18 16:18:37,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976212479] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 16:18:37,849 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 16:18:37,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 14 [2023-12-18 16:18:37,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637298668] [2023-12-18 16:18:37,850 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 16:18:37,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-18 16:18:37,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 16:18:37,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-18 16:18:37,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-12-18 16:18:37,851 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 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) [2023-12-18 16:18:37,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 16:18:37,884 INFO L93 Difference]: Finished difference Result 61 states and 85 transitions. [2023-12-18 16:18:37,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-18 16:18:37,885 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 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) Word has length 19 [2023-12-18 16:18:37,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 16:18:37,885 INFO L225 Difference]: With dead ends: 61 [2023-12-18 16:18:37,885 INFO L226 Difference]: Without dead ends: 41 [2023-12-18 16:18:37,885 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-12-18 16:18:37,886 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 5 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 16:18:37,886 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 80 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 16:18:37,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-12-18 16:18:37,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 37. [2023-12-18 16:18:37,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.25) internal successors, (45), 36 states have internal predecessors, (45), 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) [2023-12-18 16:18:37,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2023-12-18 16:18:37,889 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 19 [2023-12-18 16:18:37,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 16:18:37,890 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2023-12-18 16:18:37,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 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) [2023-12-18 16:18:37,890 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2023-12-18 16:18:37,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-12-18 16:18:37,890 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 16:18:37,890 INFO L195 NwaCegarLoop]: trace histogram [10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 16:18:37,895 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-18 16:18:38,095 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 [2023-12-18 16:18:38,095 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 16:18:38,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 16:18:38,096 INFO L85 PathProgramCache]: Analyzing trace with hash 1522098536, now seen corresponding path program 3 times [2023-12-18 16:18:38,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 16:18:38,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004158987] [2023-12-18 16:18:38,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 16:18:38,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 16:18:38,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 16:18:38,206 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-12-18 16:18:38,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 16:18:38,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004158987] [2023-12-18 16:18:38,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004158987] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 16:18:38,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192892552] [2023-12-18 16:18:38,207 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-18 16:18:38,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 16:18:38,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 16:18:38,220 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) [2023-12-18 16:18:38,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-18 16:18:38,284 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-12-18 16:18:38,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 16:18:38,286 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-18 16:18:38,287 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 16:18:38,304 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-12-18 16:18:38,304 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 16:18:38,344 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-12-18 16:18:38,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192892552] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 16:18:38,345 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 16:18:38,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2023-12-18 16:18:38,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837543250] [2023-12-18 16:18:38,345 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 16:18:38,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-18 16:18:38,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 16:18:38,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-18 16:18:38,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2023-12-18 16:18:38,346 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 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) [2023-12-18 16:18:38,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 16:18:38,389 INFO L93 Difference]: Finished difference Result 85 states and 116 transitions. [2023-12-18 16:18:38,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-18 16:18:38,390 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 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) Word has length 28 [2023-12-18 16:18:38,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 16:18:38,390 INFO L225 Difference]: With dead ends: 85 [2023-12-18 16:18:38,390 INFO L226 Difference]: Without dead ends: 61 [2023-12-18 16:18:38,391 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2023-12-18 16:18:38,391 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 20 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 16:18:38,391 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 42 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 16:18:38,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-12-18 16:18:38,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2023-12-18 16:18:38,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.2833333333333334) internal successors, (77), 60 states have internal predecessors, (77), 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) [2023-12-18 16:18:38,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 77 transitions. [2023-12-18 16:18:38,396 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 77 transitions. Word has length 28 [2023-12-18 16:18:38,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 16:18:38,397 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 77 transitions. [2023-12-18 16:18:38,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 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) [2023-12-18 16:18:38,397 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 77 transitions. [2023-12-18 16:18:38,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-12-18 16:18:38,397 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 16:18:38,398 INFO L195 NwaCegarLoop]: trace histogram [10, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 16:18:38,406 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-12-18 16:18:38,602 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 [2023-12-18 16:18:38,602 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 16:18:38,603 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 16:18:38,603 INFO L85 PathProgramCache]: Analyzing trace with hash -302265880, now seen corresponding path program 4 times [2023-12-18 16:18:38,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 16:18:38,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466689945] [2023-12-18 16:18:38,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 16:18:38,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 16:18:38,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 16:18:38,768 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-12-18 16:18:38,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 16:18:38,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466689945] [2023-12-18 16:18:38,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466689945] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 16:18:38,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954679512] [2023-12-18 16:18:38,768 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-18 16:18:38,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 16:18:38,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 16:18:38,769 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) [2023-12-18 16:18:38,774 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-18 16:18:38,844 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-18 16:18:38,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 16:18:38,845 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-18 16:18:38,846 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 16:18:38,920 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 1 proven. 51 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-12-18 16:18:38,920 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 16:18:39,049 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 1 proven. 51 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-12-18 16:18:39,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954679512] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 16:18:39,049 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 16:18:39,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 9] total 27 [2023-12-18 16:18:39,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931681109] [2023-12-18 16:18:39,049 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 16:18:39,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-12-18 16:18:39,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 16:18:39,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-12-18 16:18:39,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=505, Unknown=0, NotChecked=0, Total=702 [2023-12-18 16:18:39,051 INFO L87 Difference]: Start difference. First operand 61 states and 77 transitions. Second operand has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 27 states have internal predecessors, (69), 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) [2023-12-18 16:18:39,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 16:18:39,125 INFO L93 Difference]: Finished difference Result 159 states and 223 transitions. [2023-12-18 16:18:39,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-12-18 16:18:39,125 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 27 states have internal predecessors, (69), 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) Word has length 40 [2023-12-18 16:18:39,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 16:18:39,126 INFO L225 Difference]: With dead ends: 159 [2023-12-18 16:18:39,126 INFO L226 Difference]: Without dead ends: 110 [2023-12-18 16:18:39,127 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=197, Invalid=505, Unknown=0, NotChecked=0, Total=702 [2023-12-18 16:18:39,127 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 40 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 16:18:39,127 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 89 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 16:18:39,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2023-12-18 16:18:39,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2023-12-18 16:18:39,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 1.3027522935779816) internal successors, (142), 109 states have internal predecessors, (142), 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) [2023-12-18 16:18:39,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 142 transitions. [2023-12-18 16:18:39,134 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 142 transitions. Word has length 40 [2023-12-18 16:18:39,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 16:18:39,134 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 142 transitions. [2023-12-18 16:18:39,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 27 states have internal predecessors, (69), 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) [2023-12-18 16:18:39,134 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 142 transitions. [2023-12-18 16:18:39,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-12-18 16:18:39,136 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 16:18:39,136 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 16:18:39,152 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-12-18 16:18:39,340 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 [2023-12-18 16:18:39,340 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 16:18:39,341 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 16:18:39,341 INFO L85 PathProgramCache]: Analyzing trace with hash 299109283, now seen corresponding path program 5 times [2023-12-18 16:18:39,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 16:18:39,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282584275] [2023-12-18 16:18:39,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 16:18:39,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 16:18:39,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 16:18:39,530 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2023-12-18 16:18:39,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 16:18:39,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282584275] [2023-12-18 16:18:39,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282584275] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 16:18:39,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442714742] [2023-12-18 16:18:39,530 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-18 16:18:39,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 16:18:39,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 16:18:39,548 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) [2023-12-18 16:18:39,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-18 16:18:39,667 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2023-12-18 16:18:39,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 16:18:39,669 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-18 16:18:39,670 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 16:18:39,893 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 1 proven. 287 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-12-18 16:18:39,893 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 16:18:40,315 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 1 proven. 287 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-12-18 16:18:40,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442714742] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 16:18:40,316 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 16:18:40,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17, 17] total 44 [2023-12-18 16:18:40,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526565622] [2023-12-18 16:18:40,316 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 16:18:40,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-12-18 16:18:40,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 16:18:40,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-12-18 16:18:40,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=586, Invalid=1306, Unknown=0, NotChecked=0, Total=1892 [2023-12-18 16:18:40,319 INFO L87 Difference]: Start difference. First operand 110 states and 142 transitions. Second operand has 44 states, 44 states have (on average 2.6818181818181817) internal successors, (118), 44 states have internal predecessors, (118), 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) [2023-12-18 16:18:40,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 16:18:40,455 INFO L93 Difference]: Finished difference Result 304 states and 432 transitions. [2023-12-18 16:18:40,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-12-18 16:18:40,456 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.6818181818181817) internal successors, (118), 44 states have internal predecessors, (118), 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) Word has length 65 [2023-12-18 16:18:40,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 16:18:40,459 INFO L225 Difference]: With dead ends: 304 [2023-12-18 16:18:40,459 INFO L226 Difference]: Without dead ends: 207 [2023-12-18 16:18:40,460 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=586, Invalid=1306, Unknown=0, NotChecked=0, Total=1892 [2023-12-18 16:18:40,461 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 89 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 16:18:40,461 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 166 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 16:18:40,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2023-12-18 16:18:40,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 207. [2023-12-18 16:18:40,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 1.3155339805825244) internal successors, (271), 206 states have internal predecessors, (271), 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) [2023-12-18 16:18:40,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 271 transitions. [2023-12-18 16:18:40,479 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 271 transitions. Word has length 65 [2023-12-18 16:18:40,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 16:18:40,480 INFO L495 AbstractCegarLoop]: Abstraction has 207 states and 271 transitions. [2023-12-18 16:18:40,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.6818181818181817) internal successors, (118), 44 states have internal predecessors, (118), 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) [2023-12-18 16:18:40,480 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 271 transitions. [2023-12-18 16:18:40,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2023-12-18 16:18:40,481 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 16:18:40,481 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 30, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 16:18:40,512 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-12-18 16:18:40,696 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 [2023-12-18 16:18:40,697 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 16:18:40,697 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 16:18:40,697 INFO L85 PathProgramCache]: Analyzing trace with hash -683125688, now seen corresponding path program 6 times [2023-12-18 16:18:40,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 16:18:40,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662047881] [2023-12-18 16:18:40,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 16:18:40,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 16:18:40,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 16:18:40,990 INFO L134 CoverageAnalysis]: Checked inductivity of 1414 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 1336 trivial. 0 not checked. [2023-12-18 16:18:40,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 16:18:40,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662047881] [2023-12-18 16:18:40,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662047881] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 16:18:40,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754577904] [2023-12-18 16:18:40,991 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-18 16:18:40,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 16:18:40,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 16:18:40,992 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) [2023-12-18 16:18:41,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-18 16:18:41,074 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-12-18 16:18:41,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 16:18:41,076 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2023-12-18 16:18:41,089 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 16:18:41,546 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 16:18:41,547 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2023-12-18 16:18:41,560 INFO L134 CoverageAnalysis]: Checked inductivity of 1414 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 1354 trivial. 0 not checked. [2023-12-18 16:18:41,560 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 16:18:41,781 INFO L349 Elim1Store]: treesize reduction 13, result has 60.6 percent of original size [2023-12-18 16:18:41,782 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 28 [2023-12-18 16:18:41,818 INFO L134 CoverageAnalysis]: Checked inductivity of 1414 backedges. 30 proven. 30 refuted. 0 times theorem prover too weak. 1354 trivial. 0 not checked. [2023-12-18 16:18:41,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754577904] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 16:18:41,819 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 16:18:41,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9, 8] total 29 [2023-12-18 16:18:41,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164211773] [2023-12-18 16:18:41,819 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 16:18:41,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-12-18 16:18:41,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 16:18:41,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-12-18 16:18:41,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=657, Unknown=0, NotChecked=0, Total=812 [2023-12-18 16:18:41,820 INFO L87 Difference]: Start difference. First operand 207 states and 271 transitions. Second operand has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 29 states have internal predecessors, (61), 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) [2023-12-18 16:18:42,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 16:18:42,211 INFO L93 Difference]: Finished difference Result 413 states and 545 transitions. [2023-12-18 16:18:42,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-12-18 16:18:42,211 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 29 states have internal predecessors, (61), 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) Word has length 114 [2023-12-18 16:18:42,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 16:18:42,212 INFO L225 Difference]: With dead ends: 413 [2023-12-18 16:18:42,212 INFO L226 Difference]: Without dead ends: 220 [2023-12-18 16:18:42,213 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 213 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=426, Invalid=1926, Unknown=0, NotChecked=0, Total=2352 [2023-12-18 16:18:42,214 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 68 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 16:18:42,214 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 173 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 16:18:42,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2023-12-18 16:18:42,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 211. [2023-12-18 16:18:42,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 1.3095238095238095) internal successors, (275), 210 states have internal predecessors, (275), 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) [2023-12-18 16:18:42,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 275 transitions. [2023-12-18 16:18:42,223 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 275 transitions. Word has length 114 [2023-12-18 16:18:42,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 16:18:42,223 INFO L495 AbstractCegarLoop]: Abstraction has 211 states and 275 transitions. [2023-12-18 16:18:42,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 29 states have internal predecessors, (61), 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) [2023-12-18 16:18:42,223 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 275 transitions. [2023-12-18 16:18:42,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2023-12-18 16:18:42,224 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 16:18:42,224 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 30, 13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 16:18:42,231 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-12-18 16:18:42,428 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 [2023-12-18 16:18:42,429 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 16:18:42,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 16:18:42,429 INFO L85 PathProgramCache]: Analyzing trace with hash -1663067282, now seen corresponding path program 1 times [2023-12-18 16:18:42,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 16:18:42,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927599320] [2023-12-18 16:18:42,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 16:18:42,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 16:18:42,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 16:18:42,689 INFO L134 CoverageAnalysis]: Checked inductivity of 1429 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 1338 trivial. 0 not checked. [2023-12-18 16:18:42,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 16:18:42,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927599320] [2023-12-18 16:18:42,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927599320] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 16:18:42,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486470523] [2023-12-18 16:18:42,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 16:18:42,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 16:18:42,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 16:18:42,706 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) [2023-12-18 16:18:42,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-18 16:18:42,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 16:18:42,833 INFO L262 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 15 conjunts are in the unsatisfiable core [2023-12-18 16:18:42,835 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 16:18:42,859 INFO L134 CoverageAnalysis]: Checked inductivity of 1429 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 1338 trivial. 0 not checked. [2023-12-18 16:18:42,859 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 16:18:43,082 INFO L134 CoverageAnalysis]: Checked inductivity of 1429 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 1338 trivial. 0 not checked. [2023-12-18 16:18:43,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486470523] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 16:18:43,082 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 16:18:43,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 30 [2023-12-18 16:18:43,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790316318] [2023-12-18 16:18:43,083 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 16:18:43,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-12-18 16:18:43,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 16:18:43,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-12-18 16:18:43,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2023-12-18 16:18:43,084 INFO L87 Difference]: Start difference. First operand 211 states and 275 transitions. Second operand has 31 states, 31 states have (on average 1.5161290322580645) internal successors, (47), 30 states have internal predecessors, (47), 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) [2023-12-18 16:18:43,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 16:18:43,114 INFO L93 Difference]: Finished difference Result 422 states and 564 transitions. [2023-12-18 16:18:43,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-12-18 16:18:43,115 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.5161290322580645) internal successors, (47), 30 states have internal predecessors, (47), 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) Word has length 118 [2023-12-18 16:18:43,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 16:18:43,115 INFO L225 Difference]: With dead ends: 422 [2023-12-18 16:18:43,116 INFO L226 Difference]: Without dead ends: 226 [2023-12-18 16:18:43,116 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2023-12-18 16:18:43,117 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 16:18:43,117 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 82 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 16:18:43,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2023-12-18 16:18:43,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 226. [2023-12-18 16:18:43,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 1.288888888888889) internal successors, (290), 225 states have internal predecessors, (290), 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) [2023-12-18 16:18:43,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 290 transitions. [2023-12-18 16:18:43,124 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 290 transitions. Word has length 118 [2023-12-18 16:18:43,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 16:18:43,124 INFO L495 AbstractCegarLoop]: Abstraction has 226 states and 290 transitions. [2023-12-18 16:18:43,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.5161290322580645) internal successors, (47), 30 states have internal predecessors, (47), 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) [2023-12-18 16:18:43,124 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 290 transitions. [2023-12-18 16:18:43,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2023-12-18 16:18:43,125 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 16:18:43,125 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 30, 28, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 16:18:43,132 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-12-18 16:18:43,330 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 [2023-12-18 16:18:43,330 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 16:18:43,330 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 16:18:43,330 INFO L85 PathProgramCache]: Analyzing trace with hash 2096992841, now seen corresponding path program 2 times [2023-12-18 16:18:43,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 16:18:43,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18841231] [2023-12-18 16:18:43,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 16:18:43,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 16:18:43,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 16:18:44,058 INFO L134 CoverageAnalysis]: Checked inductivity of 1744 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 1338 trivial. 0 not checked. [2023-12-18 16:18:44,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 16:18:44,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18841231] [2023-12-18 16:18:44,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18841231] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 16:18:44,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503821877] [2023-12-18 16:18:44,058 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-18 16:18:44,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 16:18:44,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 16:18:44,060 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) [2023-12-18 16:18:44,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-18 16:18:44,196 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-18 16:18:44,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 16:18:44,198 INFO L262 TraceCheckSpWp]: Trace formula consists of 564 conjuncts, 30 conjunts are in the unsatisfiable core [2023-12-18 16:18:44,200 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 16:18:44,232 INFO L134 CoverageAnalysis]: Checked inductivity of 1744 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 1338 trivial. 0 not checked. [2023-12-18 16:18:44,232 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 16:18:45,139 INFO L134 CoverageAnalysis]: Checked inductivity of 1744 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 1338 trivial. 0 not checked. [2023-12-18 16:18:45,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503821877] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 16:18:45,139 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 16:18:45,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 60 [2023-12-18 16:18:45,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672829611] [2023-12-18 16:18:45,140 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 16:18:45,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2023-12-18 16:18:45,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 16:18:45,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2023-12-18 16:18:45,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2023-12-18 16:18:45,142 INFO L87 Difference]: Start difference. First operand 226 states and 290 transitions. Second operand has 61 states, 61 states have (on average 1.2622950819672132) internal successors, (77), 60 states have internal predecessors, (77), 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) [2023-12-18 16:18:45,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 16:18:45,198 INFO L93 Difference]: Finished difference Result 452 states and 609 transitions. [2023-12-18 16:18:45,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2023-12-18 16:18:45,198 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.2622950819672132) internal successors, (77), 60 states have internal predecessors, (77), 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) Word has length 133 [2023-12-18 16:18:45,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 16:18:45,200 INFO L225 Difference]: With dead ends: 452 [2023-12-18 16:18:45,200 INFO L226 Difference]: Without dead ends: 256 [2023-12-18 16:18:45,201 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 235 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2023-12-18 16:18:45,202 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 16:18:45,202 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 114 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 16:18:45,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2023-12-18 16:18:45,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 256. [2023-12-18 16:18:45,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 1.2549019607843137) internal successors, (320), 255 states have internal predecessors, (320), 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) [2023-12-18 16:18:45,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 320 transitions. [2023-12-18 16:18:45,209 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 320 transitions. Word has length 133 [2023-12-18 16:18:45,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 16:18:45,210 INFO L495 AbstractCegarLoop]: Abstraction has 256 states and 320 transitions. [2023-12-18 16:18:45,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.2622950819672132) internal successors, (77), 60 states have internal predecessors, (77), 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) [2023-12-18 16:18:45,210 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 320 transitions. [2023-12-18 16:18:45,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2023-12-18 16:18:45,212 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 16:18:45,213 INFO L195 NwaCegarLoop]: trace histogram [58, 30, 30, 30, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 16:18:45,232 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-12-18 16:18:45,417 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 [2023-12-18 16:18:45,418 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 16:18:45,418 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 16:18:45,418 INFO L85 PathProgramCache]: Analyzing trace with hash 86798249, now seen corresponding path program 3 times [2023-12-18 16:18:45,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 16:18:45,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961692717] [2023-12-18 16:18:45,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 16:18:45,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 16:18:45,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 16:18:47,651 INFO L134 CoverageAnalysis]: Checked inductivity of 3049 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 1338 trivial. 0 not checked. [2023-12-18 16:18:47,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 16:18:47,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961692717] [2023-12-18 16:18:47,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961692717] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 16:18:47,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589732333] [2023-12-18 16:18:47,652 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-18 16:18:47,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 16:18:47,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 16:18:47,653 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) [2023-12-18 16:18:47,658 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-18 16:18:47,823 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-12-18 16:18:47,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 16:18:47,825 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 30 conjunts are in the unsatisfiable core [2023-12-18 16:18:47,829 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 16:18:48,449 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 16:18:48,450 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 13 [2023-12-18 16:18:48,477 INFO L134 CoverageAnalysis]: Checked inductivity of 3049 backedges. 1 proven. 147 refuted. 0 times theorem prover too weak. 2901 trivial. 0 not checked. [2023-12-18 16:18:48,477 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 16:18:49,086 INFO L349 Elim1Store]: treesize reduction 13, result has 73.5 percent of original size [2023-12-18 16:18:49,087 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 49 treesize of output 47 [2023-12-18 16:18:49,170 INFO L134 CoverageAnalysis]: Checked inductivity of 3049 backedges. 29 proven. 119 refuted. 0 times theorem prover too weak. 2901 trivial. 0 not checked. [2023-12-18 16:18:49,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589732333] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 16:18:49,171 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 16:18:49,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 12, 12] total 82 [2023-12-18 16:18:49,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417045293] [2023-12-18 16:18:49,171 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 16:18:49,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2023-12-18 16:18:49,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 16:18:49,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2023-12-18 16:18:49,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1924, Invalid=4718, Unknown=0, NotChecked=0, Total=6642 [2023-12-18 16:18:49,173 INFO L87 Difference]: Start difference. First operand 256 states and 320 transitions. Second operand has 82 states, 82 states have (on average 1.475609756097561) internal successors, (121), 82 states have internal predecessors, (121), 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) [2023-12-18 16:18:51,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 16:18:51,561 INFO L93 Difference]: Finished difference Result 559 states and 722 transitions. [2023-12-18 16:18:51,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2023-12-18 16:18:51,562 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 1.475609756097561) internal successors, (121), 82 states have internal predecessors, (121), 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) Word has length 163 [2023-12-18 16:18:51,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 16:18:51,564 INFO L225 Difference]: With dead ends: 559 [2023-12-18 16:18:51,564 INFO L226 Difference]: Without dead ends: 363 [2023-12-18 16:18:51,568 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 456 GetRequests, 304 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4262 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=5717, Invalid=17845, Unknown=0, NotChecked=0, Total=23562 [2023-12-18 16:18:51,569 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 43 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 537 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-18 16:18:51,569 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 226 Invalid, 545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 537 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-18 16:18:51,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2023-12-18 16:18:51,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 260. [2023-12-18 16:18:51,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 259 states have (on average 1.250965250965251) internal successors, (324), 259 states have internal predecessors, (324), 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) [2023-12-18 16:18:51,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 324 transitions. [2023-12-18 16:18:51,577 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 324 transitions. Word has length 163 [2023-12-18 16:18:51,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 16:18:51,579 INFO L495 AbstractCegarLoop]: Abstraction has 260 states and 324 transitions. [2023-12-18 16:18:51,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 1.475609756097561) internal successors, (121), 82 states have internal predecessors, (121), 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) [2023-12-18 16:18:51,579 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 324 transitions. [2023-12-18 16:18:51,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2023-12-18 16:18:51,580 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 16:18:51,580 INFO L195 NwaCegarLoop]: trace histogram [59, 30, 30, 30, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 16:18:51,587 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-12-18 16:18:51,785 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 [2023-12-18 16:18:51,785 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 16:18:51,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 16:18:51,785 INFO L85 PathProgramCache]: Analyzing trace with hash 464838339, now seen corresponding path program 4 times [2023-12-18 16:18:51,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 16:18:51,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482142655] [2023-12-18 16:18:51,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 16:18:51,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 16:18:51,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 16:18:53,647 INFO L134 CoverageAnalysis]: Checked inductivity of 3113 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 1343 trivial. 0 not checked. [2023-12-18 16:18:53,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 16:18:53,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482142655] [2023-12-18 16:18:53,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482142655] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 16:18:53,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943358798] [2023-12-18 16:18:53,648 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-18 16:18:53,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 16:18:53,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 16:18:53,657 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) [2023-12-18 16:18:53,658 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-18 16:18:53,859 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-18 16:18:53,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 16:18:53,863 INFO L262 TraceCheckSpWp]: Trace formula consists of 855 conjuncts, 32 conjunts are in the unsatisfiable core [2023-12-18 16:18:53,865 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 16:18:54,827 INFO L134 CoverageAnalysis]: Checked inductivity of 3113 backedges. 1 proven. 1335 refuted. 0 times theorem prover too weak. 1777 trivial. 0 not checked. [2023-12-18 16:18:54,827 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 16:18:55,886 INFO L134 CoverageAnalysis]: Checked inductivity of 3113 backedges. 1 proven. 1335 refuted. 0 times theorem prover too weak. 1777 trivial. 0 not checked. [2023-12-18 16:18:55,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943358798] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 16:18:55,887 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 16:18:55,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 33, 33] total 124 [2023-12-18 16:18:55,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508437144] [2023-12-18 16:18:55,887 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 16:18:55,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 124 states [2023-12-18 16:18:55,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 16:18:55,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2023-12-18 16:18:55,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3906, Invalid=11346, Unknown=0, NotChecked=0, Total=15252 [2023-12-18 16:18:55,893 INFO L87 Difference]: Start difference. First operand 260 states and 324 transitions. Second operand has 124 states, 124 states have (on average 2.129032258064516) internal successors, (264), 124 states have internal predecessors, (264), 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) [2023-12-18 16:18:56,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 16:18:56,246 INFO L93 Difference]: Finished difference Result 652 states and 908 transitions. [2023-12-18 16:18:56,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2023-12-18 16:18:56,247 INFO L78 Accepts]: Start accepts. Automaton has has 124 states, 124 states have (on average 2.129032258064516) internal successors, (264), 124 states have internal predecessors, (264), 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) Word has length 167 [2023-12-18 16:18:56,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 16:18:56,248 INFO L225 Difference]: With dead ends: 652 [2023-12-18 16:18:56,248 INFO L226 Difference]: Without dead ends: 453 [2023-12-18 16:18:56,250 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 271 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3658 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=3906, Invalid=11346, Unknown=0, NotChecked=0, Total=15252 [2023-12-18 16:18:56,250 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 262 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-18 16:18:56,250 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [262 Valid, 185 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-18 16:18:56,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2023-12-18 16:18:56,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 453. [2023-12-18 16:18:56,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 453 states, 452 states have (on average 1.2853982300884956) internal successors, (581), 452 states have internal predecessors, (581), 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) [2023-12-18 16:18:56,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 581 transitions. [2023-12-18 16:18:56,262 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 581 transitions. Word has length 167 [2023-12-18 16:18:56,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 16:18:56,263 INFO L495 AbstractCegarLoop]: Abstraction has 453 states and 581 transitions. [2023-12-18 16:18:56,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 124 states, 124 states have (on average 2.129032258064516) internal successors, (264), 124 states have internal predecessors, (264), 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) [2023-12-18 16:18:56,263 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 581 transitions. [2023-12-18 16:18:56,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2023-12-18 16:18:56,265 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 16:18:56,265 INFO L195 NwaCegarLoop]: trace histogram [62, 62, 62, 60, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 16:18:56,282 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-12-18 16:18:56,469 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 [2023-12-18 16:18:56,470 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 16:18:56,470 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 16:18:56,470 INFO L85 PathProgramCache]: Analyzing trace with hash 191577512, now seen corresponding path program 5 times [2023-12-18 16:18:56,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 16:18:56,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502667984] [2023-12-18 16:18:56,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 16:18:56,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 16:18:56,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 16:18:58,437 INFO L134 CoverageAnalysis]: Checked inductivity of 7573 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 5743 trivial. 0 not checked. [2023-12-18 16:18:58,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 16:18:58,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502667984] [2023-12-18 16:18:58,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502667984] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 16:18:58,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876058185] [2023-12-18 16:18:58,438 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-18 16:18:58,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 16:18:58,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 16:18:58,439 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) [2023-12-18 16:18:58,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-18 16:19:47,745 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 63 check-sat command(s) [2023-12-18 16:19:47,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 16:19:47,778 INFO L262 TraceCheckSpWp]: Trace formula consists of 1069 conjuncts, 64 conjunts are in the unsatisfiable core [2023-12-18 16:19:47,782 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 16:19:50,133 INFO L134 CoverageAnalysis]: Checked inductivity of 7573 backedges. 1 proven. 5735 refuted. 0 times theorem prover too weak. 1837 trivial. 0 not checked. [2023-12-18 16:19:50,133 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 16:19:54,735 INFO L134 CoverageAnalysis]: Checked inductivity of 7573 backedges. 1 proven. 5735 refuted. 0 times theorem prover too weak. 1837 trivial. 0 not checked. [2023-12-18 16:19:54,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876058185] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 16:19:54,736 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 16:19:54,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 65, 65] total 189 [2023-12-18 16:19:54,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642729989] [2023-12-18 16:19:54,736 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 16:19:54,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 189 states [2023-12-18 16:19:54,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 16:19:54,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 189 interpolants. [2023-12-18 16:19:54,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10080, Invalid=25452, Unknown=0, NotChecked=0, Total=35532 [2023-12-18 16:19:54,742 INFO L87 Difference]: Start difference. First operand 453 states and 581 transitions. Second operand has 189 states, 189 states have (on average 2.417989417989418) internal successors, (457), 189 states have internal predecessors, (457), 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) [2023-12-18 16:19:56,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 16:19:56,218 INFO L93 Difference]: Finished difference Result 1229 states and 1741 transitions. [2023-12-18 16:19:56,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 189 states. [2023-12-18 16:19:56,219 INFO L78 Accepts]: Start accepts. Automaton has has 189 states, 189 states have (on average 2.417989417989418) internal successors, (457), 189 states have internal predecessors, (457), 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) Word has length 264 [2023-12-18 16:19:56,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 16:19:56,231 INFO L225 Difference]: With dead ends: 1229 [2023-12-18 16:19:56,232 INFO L226 Difference]: Without dead ends: 838 [2023-12-18 16:19:56,237 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 588 GetRequests, 401 SyntacticMatches, 0 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7560 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=10080, Invalid=25452, Unknown=0, NotChecked=0, Total=35532 [2023-12-18 16:19:56,237 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 485 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 503 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 485 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-18 16:19:56,238 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [485 Valid, 271 Invalid, 505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 503 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-18 16:19:56,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 838 states. [2023-12-18 16:19:56,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 838 to 838. [2023-12-18 16:19:56,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 838 states, 837 states have (on average 1.3070489844683393) internal successors, (1094), 837 states have internal predecessors, (1094), 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) [2023-12-18 16:19:56,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 838 states to 838 states and 1094 transitions. [2023-12-18 16:19:56,262 INFO L78 Accepts]: Start accepts. Automaton has 838 states and 1094 transitions. Word has length 264 [2023-12-18 16:19:56,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 16:19:56,263 INFO L495 AbstractCegarLoop]: Abstraction has 838 states and 1094 transitions. [2023-12-18 16:19:56,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 189 states, 189 states have (on average 2.417989417989418) internal successors, (457), 189 states have internal predecessors, (457), 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) [2023-12-18 16:19:56,264 INFO L276 IsEmpty]: Start isEmpty. Operand 838 states and 1094 transitions. [2023-12-18 16:19:56,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 458 [2023-12-18 16:19:56,272 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 16:19:56,272 INFO L195 NwaCegarLoop]: trace histogram [126, 126, 126, 61, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 16:19:56,293 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-12-18 16:19:56,494 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 [2023-12-18 16:19:56,494 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 16:19:56,495 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 16:19:56,495 INFO L85 PathProgramCache]: Analyzing trace with hash 271285091, now seen corresponding path program 6 times [2023-12-18 16:19:56,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 16:19:56,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523156159] [2023-12-18 16:19:56,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 16:19:56,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 16:19:56,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 16:19:59,126 INFO L134 CoverageAnalysis]: Checked inductivity of 25650 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 23759 trivial. 0 not checked. [2023-12-18 16:19:59,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 16:19:59,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523156159] [2023-12-18 16:19:59,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523156159] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 16:19:59,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068006675] [2023-12-18 16:19:59,126 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-18 16:19:59,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 16:19:59,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 16:19:59,128 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) [2023-12-18 16:19:59,129 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-12-18 16:19:59,701 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2023-12-18 16:19:59,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 16:19:59,704 INFO L262 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 37 conjunts are in the unsatisfiable core [2023-12-18 16:19:59,709 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 16:20:01,126 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 16:20:01,126 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 13 [2023-12-18 16:20:01,158 INFO L134 CoverageAnalysis]: Checked inductivity of 25650 backedges. 0 proven. 1004 refuted. 0 times theorem prover too weak. 24646 trivial. 0 not checked. [2023-12-18 16:20:01,158 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 16:20:02,619 INFO L349 Elim1Store]: treesize reduction 13, result has 73.5 percent of original size [2023-12-18 16:20:02,620 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 49 treesize of output 47 [2023-12-18 16:20:02,719 INFO L134 CoverageAnalysis]: Checked inductivity of 25650 backedges. 124 proven. 880 refuted. 0 times theorem prover too weak. 24646 trivial. 0 not checked. [2023-12-18 16:20:02,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068006675] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 16:20:02,720 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 16:20:02,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 15, 14] total 90 [2023-12-18 16:20:02,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306460068] [2023-12-18 16:20:02,721 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 16:20:02,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2023-12-18 16:20:02,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 16:20:02,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2023-12-18 16:20:02,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2130, Invalid=5880, Unknown=0, NotChecked=0, Total=8010 [2023-12-18 16:20:02,724 INFO L87 Difference]: Start difference. First operand 838 states and 1094 transitions. Second operand has 90 states, 90 states have (on average 1.511111111111111) internal successors, (136), 90 states have internal predecessors, (136), 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) [2023-12-18 16:20:05,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 16:20:05,513 INFO L93 Difference]: Finished difference Result 2011 states and 2655 transitions. [2023-12-18 16:20:05,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2023-12-18 16:20:05,514 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 1.511111111111111) internal successors, (136), 90 states have internal predecessors, (136), 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) Word has length 457 [2023-12-18 16:20:05,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 16:20:05,517 INFO L225 Difference]: With dead ends: 2011 [2023-12-18 16:20:05,517 INFO L226 Difference]: Without dead ends: 1236 [2023-12-18 16:20:05,520 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1058 GetRequests, 887 SyntacticMatches, 0 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5672 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=6376, Invalid=23380, Unknown=0, NotChecked=0, Total=29756 [2023-12-18 16:20:05,520 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 60 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 924 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 940 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 924 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-18 16:20:05,521 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 349 Invalid, 940 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 924 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-18 16:20:05,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1236 states. [2023-12-18 16:20:05,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1236 to 842. [2023-12-18 16:20:05,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 842 states, 841 states have (on average 1.305588585017836) internal successors, (1098), 841 states have internal predecessors, (1098), 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) [2023-12-18 16:20:05,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 1098 transitions. [2023-12-18 16:20:05,560 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 1098 transitions. Word has length 457 [2023-12-18 16:20:05,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 16:20:05,560 INFO L495 AbstractCegarLoop]: Abstraction has 842 states and 1098 transitions. [2023-12-18 16:20:05,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 1.511111111111111) internal successors, (136), 90 states have internal predecessors, (136), 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) [2023-12-18 16:20:05,561 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 1098 transitions. [2023-12-18 16:20:05,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 462 [2023-12-18 16:20:05,565 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 16:20:05,565 INFO L195 NwaCegarLoop]: trace histogram [126, 126, 126, 62, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 16:20:05,574 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-12-18 16:20:05,771 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 [2023-12-18 16:20:05,772 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 16:20:05,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 16:20:05,772 INFO L85 PathProgramCache]: Analyzing trace with hash 1691151497, now seen corresponding path program 7 times [2023-12-18 16:20:05,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 16:20:05,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878801671] [2023-12-18 16:20:05,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 16:20:05,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 16:20:05,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 16:20:08,128 INFO L134 CoverageAnalysis]: Checked inductivity of 25720 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 23767 trivial. 0 not checked. [2023-12-18 16:20:08,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 16:20:08,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878801671] [2023-12-18 16:20:08,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878801671] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 16:20:08,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817916287] [2023-12-18 16:20:08,129 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-18 16:20:08,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 16:20:08,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 16:20:08,130 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) [2023-12-18 16:20:08,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-12-18 16:20:08,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 16:20:08,514 INFO L262 TraceCheckSpWp]: Trace formula consists of 1662 conjuncts, 64 conjunts are in the unsatisfiable core [2023-12-18 16:20:08,518 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 16:20:08,590 INFO L134 CoverageAnalysis]: Checked inductivity of 25720 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 23767 trivial. 0 not checked. [2023-12-18 16:20:08,590 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 16:20:11,697 INFO L134 CoverageAnalysis]: Checked inductivity of 25720 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 23767 trivial. 0 not checked. [2023-12-18 16:20:11,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817916287] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 16:20:11,698 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 16:20:11,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64, 64] total 128 [2023-12-18 16:20:11,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539347760] [2023-12-18 16:20:11,698 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 16:20:11,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 129 states [2023-12-18 16:20:11,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 16:20:11,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2023-12-18 16:20:11,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8256, Invalid=8256, Unknown=0, NotChecked=0, Total=16512 [2023-12-18 16:20:11,701 INFO L87 Difference]: Start difference. First operand 842 states and 1098 transitions. Second operand has 129 states, 129 states have (on average 1.124031007751938) internal successors, (145), 128 states have internal predecessors, (145), 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) [2023-12-18 16:20:11,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 16:20:11,846 INFO L93 Difference]: Finished difference Result 1684 states and 2259 transitions. [2023-12-18 16:20:11,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2023-12-18 16:20:11,847 INFO L78 Accepts]: Start accepts. Automaton has has 129 states, 129 states have (on average 1.124031007751938) internal successors, (145), 128 states have internal predecessors, (145), 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) Word has length 461 [2023-12-18 16:20:11,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 16:20:11,850 INFO L225 Difference]: With dead ends: 1684 [2023-12-18 16:20:11,850 INFO L226 Difference]: Without dead ends: 906 [2023-12-18 16:20:11,852 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 984 GetRequests, 857 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=8256, Invalid=8256, Unknown=0, NotChecked=0, Total=16512 [2023-12-18 16:20:11,853 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 16:20:11,853 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 98 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 16:20:11,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 906 states. [2023-12-18 16:20:11,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 906 to 906. [2023-12-18 16:20:11,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 906 states, 905 states have (on average 1.2839779005524863) internal successors, (1162), 905 states have internal predecessors, (1162), 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) [2023-12-18 16:20:11,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 906 states to 906 states and 1162 transitions. [2023-12-18 16:20:11,883 INFO L78 Accepts]: Start accepts. Automaton has 906 states and 1162 transitions. Word has length 461 [2023-12-18 16:20:11,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 16:20:11,883 INFO L495 AbstractCegarLoop]: Abstraction has 906 states and 1162 transitions. [2023-12-18 16:20:11,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 129 states, 129 states have (on average 1.124031007751938) internal successors, (145), 128 states have internal predecessors, (145), 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) [2023-12-18 16:20:11,883 INFO L276 IsEmpty]: Start isEmpty. Operand 906 states and 1162 transitions. [2023-12-18 16:20:11,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 526 [2023-12-18 16:20:11,886 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 16:20:11,886 INFO L195 NwaCegarLoop]: trace histogram [126, 126, 126, 126, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 16:20:11,892 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-12-18 16:20:12,092 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 [2023-12-18 16:20:12,093 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 16:20:12,093 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 16:20:12,093 INFO L85 PathProgramCache]: Analyzing trace with hash 440664201, now seen corresponding path program 8 times [2023-12-18 16:20:12,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 16:20:12,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207319221] [2023-12-18 16:20:12,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 16:20:12,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 16:20:12,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 16:20:19,485 INFO L134 CoverageAnalysis]: Checked inductivity of 31768 backedges. 0 proven. 8001 refuted. 0 times theorem prover too weak. 23767 trivial. 0 not checked. [2023-12-18 16:20:19,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 16:20:19,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207319221] [2023-12-18 16:20:19,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207319221] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 16:20:19,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594679042] [2023-12-18 16:20:19,485 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-18 16:20:19,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 16:20:19,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 16:20:19,488 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) [2023-12-18 16:20:19,490 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-12-18 16:20:19,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-18 16:20:19,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 16:20:19,979 INFO L262 TraceCheckSpWp]: Trace formula consists of 2238 conjuncts, 128 conjunts are in the unsatisfiable core [2023-12-18 16:20:19,985 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 16:20:20,105 INFO L134 CoverageAnalysis]: Checked inductivity of 31768 backedges. 0 proven. 8001 refuted. 0 times theorem prover too weak. 23767 trivial. 0 not checked. [2023-12-18 16:20:20,105 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 16:20:32,341 INFO L134 CoverageAnalysis]: Checked inductivity of 31768 backedges. 0 proven. 8001 refuted. 0 times theorem prover too weak. 23767 trivial. 0 not checked. [2023-12-18 16:20:32,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594679042] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 16:20:32,342 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 16:20:32,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [128, 128, 128] total 256 [2023-12-18 16:20:32,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462828276] [2023-12-18 16:20:32,342 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 16:20:32,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 257 states [2023-12-18 16:20:32,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 16:20:32,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 257 interpolants. [2023-12-18 16:20:32,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32896, Invalid=32896, Unknown=0, NotChecked=0, Total=65792 [2023-12-18 16:20:32,351 INFO L87 Difference]: Start difference. First operand 906 states and 1162 transitions. Second operand has 257 states, 257 states have (on average 1.0622568093385214) internal successors, (273), 256 states have internal predecessors, (273), 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) [2023-12-18 16:20:32,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 16:20:32,745 INFO L93 Difference]: Finished difference Result 1812 states and 2451 transitions. [2023-12-18 16:20:32,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 256 states. [2023-12-18 16:20:32,745 INFO L78 Accepts]: Start accepts. Automaton has has 257 states, 257 states have (on average 1.0622568093385214) internal successors, (273), 256 states have internal predecessors, (273), 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) Word has length 525 [2023-12-18 16:20:32,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 16:20:32,748 INFO L225 Difference]: With dead ends: 1812 [2023-12-18 16:20:32,748 INFO L226 Difference]: Without dead ends: 1034 [2023-12-18 16:20:32,752 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1176 GetRequests, 921 SyntacticMatches, 0 SemanticMatches, 255 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 15.1s TimeCoverageRelationStatistics Valid=32896, Invalid=32896, Unknown=0, NotChecked=0, Total=65792 [2023-12-18 16:20:32,753 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 16:20:32,753 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 66 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 16:20:32,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1034 states. [2023-12-18 16:20:32,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1034 to 1034. [2023-12-18 16:20:32,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1034 states, 1033 states have (on average 1.2487899322362053) internal successors, (1290), 1033 states have internal predecessors, (1290), 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) [2023-12-18 16:20:32,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1034 states to 1034 states and 1290 transitions. [2023-12-18 16:20:32,781 INFO L78 Accepts]: Start accepts. Automaton has 1034 states and 1290 transitions. Word has length 525 [2023-12-18 16:20:32,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 16:20:32,781 INFO L495 AbstractCegarLoop]: Abstraction has 1034 states and 1290 transitions. [2023-12-18 16:20:32,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 257 states, 257 states have (on average 1.0622568093385214) internal successors, (273), 256 states have internal predecessors, (273), 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) [2023-12-18 16:20:32,781 INFO L276 IsEmpty]: Start isEmpty. Operand 1034 states and 1290 transitions. [2023-12-18 16:20:32,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 654 [2023-12-18 16:20:32,784 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 16:20:32,785 INFO L195 NwaCegarLoop]: trace histogram [254, 126, 126, 126, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 16:20:32,795 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-12-18 16:20:32,993 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 [2023-12-18 16:20:32,993 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 16:20:32,994 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 16:20:32,994 INFO L85 PathProgramCache]: Analyzing trace with hash -1118689143, now seen corresponding path program 9 times [2023-12-18 16:20:32,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 16:20:32,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108682943] [2023-12-18 16:20:32,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 16:20:32,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 16:20:33,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 16:21:02,703 INFO L134 CoverageAnalysis]: Checked inductivity of 56152 backedges. 0 proven. 32385 refuted. 0 times theorem prover too weak. 23767 trivial. 0 not checked. [2023-12-18 16:21:02,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 16:21:02,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108682943] [2023-12-18 16:21:02,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108682943] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 16:21:02,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406305659] [2023-12-18 16:21:02,704 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-18 16:21:02,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 16:21:02,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 16:21:02,705 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) [2023-12-18 16:21:02,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-12-18 16:21:04,717 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2023-12-18 16:21:04,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 16:21:04,724 INFO L262 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 43 conjunts are in the unsatisfiable core [2023-12-18 16:21:04,731 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 16:21:06,759 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 16:21:06,759 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 13 [2023-12-18 16:21:06,821 INFO L134 CoverageAnalysis]: Checked inductivity of 56152 backedges. 1 proven. 1379 refuted. 0 times theorem prover too weak. 54772 trivial. 0 not checked. [2023-12-18 16:21:06,821 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 16:21:08,855 INFO L349 Elim1Store]: treesize reduction 13, result has 73.5 percent of original size [2023-12-18 16:21:08,855 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 49 treesize of output 47 [2023-12-18 16:21:09,145 INFO L134 CoverageAnalysis]: Checked inductivity of 56152 backedges. 123 proven. 1257 refuted. 0 times theorem prover too weak. 54772 trivial. 0 not checked. [2023-12-18 16:21:09,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406305659] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 16:21:09,145 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 16:21:09,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [256, 17, 17] total 288 [2023-12-18 16:21:09,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406267393] [2023-12-18 16:21:09,146 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 16:21:09,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 288 states [2023-12-18 16:21:09,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 16:21:09,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 288 interpolants. [2023-12-18 16:21:09,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33039, Invalid=49617, Unknown=0, NotChecked=0, Total=82656 [2023-12-18 16:21:09,153 INFO L87 Difference]: Start difference. First operand 1034 states and 1290 transitions. Second operand has 288 states, 288 states have (on average 1.1840277777777777) internal successors, (341), 288 states have internal predecessors, (341), 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) [2023-12-18 16:21:30,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 16:21:30,658 INFO L93 Difference]: Finished difference Result 2213 states and 2858 transitions. [2023-12-18 16:21:30,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 284 states. [2023-12-18 16:21:30,659 INFO L78 Accepts]: Start accepts. Automaton has has 288 states, 288 states have (on average 1.1840277777777777) internal successors, (341), 288 states have internal predecessors, (341), 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) Word has length 653 [2023-12-18 16:21:30,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 16:21:30,662 INFO L225 Difference]: With dead ends: 2213 [2023-12-18 16:21:30,662 INFO L226 Difference]: Without dead ends: 1435 [2023-12-18 16:21:30,673 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1829 GetRequests, 1274 SyntacticMatches, 0 SemanticMatches, 555 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46373 ImplicationChecksByTransitivity, 36.7s TimeCoverageRelationStatistics Valid=98977, Invalid=210715, Unknown=0, NotChecked=0, Total=309692 [2023-12-18 16:21:30,674 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 65 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 1187 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 1203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-18 16:21:30,674 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 381 Invalid, 1203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1187 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-18 16:21:30,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1435 states. [2023-12-18 16:21:30,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1435 to 1038. [2023-12-18 16:21:30,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1038 states, 1037 states have (on average 1.2478302796528447) internal successors, (1294), 1037 states have internal predecessors, (1294), 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) [2023-12-18 16:21:30,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1038 states to 1038 states and 1294 transitions. [2023-12-18 16:21:30,708 INFO L78 Accepts]: Start accepts. Automaton has 1038 states and 1294 transitions. Word has length 653 [2023-12-18 16:21:30,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 16:21:30,709 INFO L495 AbstractCegarLoop]: Abstraction has 1038 states and 1294 transitions. [2023-12-18 16:21:30,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 288 states, 288 states have (on average 1.1840277777777777) internal successors, (341), 288 states have internal predecessors, (341), 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) [2023-12-18 16:21:30,709 INFO L276 IsEmpty]: Start isEmpty. Operand 1038 states and 1294 transitions. [2023-12-18 16:21:30,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 658 [2023-12-18 16:21:30,712 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 16:21:30,712 INFO L195 NwaCegarLoop]: trace histogram [255, 126, 126, 126, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 16:21:30,736 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-12-18 16:21:30,920 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 [2023-12-18 16:21:30,921 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 16:21:30,921 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 16:21:30,921 INFO L85 PathProgramCache]: Analyzing trace with hash 1276233763, now seen corresponding path program 10 times [2023-12-18 16:21:30,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 16:21:30,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167860924] [2023-12-18 16:21:30,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 16:21:30,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 16:21:31,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 16:22:05,698 INFO L134 CoverageAnalysis]: Checked inductivity of 56418 backedges. 0 proven. 32640 refuted. 0 times theorem prover too weak. 23778 trivial. 0 not checked. [2023-12-18 16:22:05,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 16:22:05,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167860924] [2023-12-18 16:22:05,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167860924] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 16:22:05,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682412479] [2023-12-18 16:22:05,699 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-18 16:22:05,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 16:22:05,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 16:22:05,700 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) [2023-12-18 16:22:05,702 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-12-18 16:22:06,521 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-18 16:22:06,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 16:22:06,538 INFO L262 TraceCheckSpWp]: Trace formula consists of 3411 conjuncts, 128 conjunts are in the unsatisfiable core [2023-12-18 16:22:06,545 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 16:22:15,895 INFO L134 CoverageAnalysis]: Checked inductivity of 56418 backedges. 1 proven. 23751 refuted. 0 times theorem prover too weak. 32666 trivial. 0 not checked. [2023-12-18 16:22:15,896 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 16:22:32,479 INFO L134 CoverageAnalysis]: Checked inductivity of 56418 backedges. 1 proven. 23751 refuted. 0 times theorem prover too weak. 32666 trivial. 0 not checked. [2023-12-18 16:22:32,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682412479] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 16:22:32,480 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 16:22:32,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [257, 129, 129] total 512 [2023-12-18 16:22:32,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149647905] [2023-12-18 16:22:32,480 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 16:22:32,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 512 states [2023-12-18 16:22:32,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 16:22:32,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 512 interpolants. [2023-12-18 16:22:32,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65792, Invalid=195840, Unknown=0, NotChecked=0, Total=261632 [2023-12-18 16:22:32,499 INFO L87 Difference]: Start difference. First operand 1038 states and 1294 transitions. Second operand has 512 states, 512 states have (on average 2.0234375) internal successors, (1036), 512 states have internal predecessors, (1036), 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) [2023-12-18 16:22:47,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 16:22:47,111 INFO L93 Difference]: Finished difference Result 2588 states and 3612 transitions. [2023-12-18 16:22:47,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 512 states. [2023-12-18 16:22:47,112 INFO L78 Accepts]: Start accepts. Automaton has has 512 states, 512 states have (on average 2.0234375) internal successors, (1036), 512 states have internal predecessors, (1036), 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) Word has length 657 [2023-12-18 16:22:47,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 16:22:47,116 INFO L225 Difference]: With dead ends: 2588 [2023-12-18 16:22:47,116 INFO L226 Difference]: Without dead ends: 1807 [2023-12-18 16:22:47,125 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1569 GetRequests, 1059 SyntacticMatches, 0 SemanticMatches, 510 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64770 ImplicationChecksByTransitivity, 43.8s TimeCoverageRelationStatistics Valid=65792, Invalid=195840, Unknown=0, NotChecked=0, Total=261632 [2023-12-18 16:22:47,125 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 1416 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 1083 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1416 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 1085 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1083 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-18 16:22:47,125 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1416 Valid, 401 Invalid, 1085 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1083 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-12-18 16:22:47,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1807 states. [2023-12-18 16:22:47,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1807 to 1807. [2023-12-18 16:22:47,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1807 states, 1806 states have (on average 1.2840531561461794) internal successors, (2319), 1806 states have internal predecessors, (2319), 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) [2023-12-18 16:22:47,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1807 states to 1807 states and 2319 transitions. [2023-12-18 16:22:47,181 INFO L78 Accepts]: Start accepts. Automaton has 1807 states and 2319 transitions. Word has length 657 [2023-12-18 16:22:47,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 16:22:47,181 INFO L495 AbstractCegarLoop]: Abstraction has 1807 states and 2319 transitions. [2023-12-18 16:22:47,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 512 states, 512 states have (on average 2.0234375) internal successors, (1036), 512 states have internal predecessors, (1036), 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) [2023-12-18 16:22:47,182 INFO L276 IsEmpty]: Start isEmpty. Operand 1807 states and 2319 transitions. [2023-12-18 16:22:47,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1043 [2023-12-18 16:22:47,188 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 16:22:47,189 INFO L195 NwaCegarLoop]: trace histogram [256, 254, 254, 254, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 16:22:47,199 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-12-18 16:22:47,391 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 [2023-12-18 16:22:47,391 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 16:22:47,392 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 16:22:47,392 INFO L85 PathProgramCache]: Analyzing trace with hash 1848143048, now seen corresponding path program 11 times [2023-12-18 16:22:47,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 16:22:47,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568713665] [2023-12-18 16:22:47,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 16:22:47,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 16:22:47,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 16:23:27,404 INFO L134 CoverageAnalysis]: Checked inductivity of 129570 backedges. 0 proven. 32896 refuted. 0 times theorem prover too weak. 96674 trivial. 0 not checked. [2023-12-18 16:23:27,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 16:23:27,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568713665] [2023-12-18 16:23:27,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568713665] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 16:23:27,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848519874] [2023-12-18 16:23:27,404 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-18 16:23:27,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 16:23:27,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 16:23:27,405 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) [2023-12-18 16:23:27,408 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process Received shutdown request... [2023-12-18 16:33:04,075 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-18 16:33:04,121 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-18 16:33:05,094 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 [2023-12-18 16:33:05,321 WARN L435 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forcibly destroying the process [2023-12-18 16:33:05,341 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 137 [2023-12-18 16:33:05,342 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-18 16:33:05,342 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-18 16:33:05,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [258] total 258 [2023-12-18 16:33:05,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308844055] [2023-12-18 16:33:05,343 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-18 16:33:05,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 259 states [2023-12-18 16:33:05,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 16:33:05,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 259 interpolants. [2023-12-18 16:33:05,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33411, Invalid=33411, Unknown=0, NotChecked=0, Total=66822 [2023-12-18 16:33:05,350 INFO L87 Difference]: Start difference. First operand 1807 states and 2319 transitions. Second operand has 259 states, 259 states have (on average 1.054054054054054) internal successors, (273), 258 states have internal predecessors, (273), 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) [2023-12-18 16:33:05,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-18 16:33:05,353 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 257 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.5s TimeCoverageRelationStatistics Valid=33411, Invalid=33411, Unknown=0, NotChecked=0, Total=66822 [2023-12-18 16:33:05,353 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 16:33:05,353 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 16:33:05,354 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-18 16:33:05,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-12-18 16:33:05,355 WARN L619 AbstractCegarLoop]: Verification canceled: while NwaCegarLoop was constructing difference of abstraction (1807states) and FLOYD_HOARE automaton (currently 2 states, 259 states before enhancement),while ReachableStatesComputation was computing reachable states (1 states constructed, input type IntersectNwa). [2023-12-18 16:33:05,358 INFO L445 BasicCegarLoop]: Path program histogram: [11, 6, 1, 1, 1] [2023-12-18 16:33:05,359 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-12-18 16:33:05,361 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.12 04:33:05 BoogieIcfgContainer [2023-12-18 16:33:05,361 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-18 16:33:05,361 INFO L158 Benchmark]: Toolchain (without parser) took 869947.09ms. Allocated memory was 311.4MB in the beginning and 1.6GB in the end (delta: 1.3GB). Free memory was 267.1MB in the beginning and 1.1GB in the end (delta: -872.4MB). Peak memory consumption was 430.2MB. Max. memory is 8.0GB. [2023-12-18 16:33:05,361 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 186.6MB. Free memory is still 134.1MB. There was no memory consumed. Max. memory is 8.0GB. [2023-12-18 16:33:05,361 INFO L158 Benchmark]: CACSL2BoogieTranslator took 161.60ms. Allocated memory is still 311.4MB. Free memory was 266.9MB in the beginning and 255.8MB in the end (delta: 11.1MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-12-18 16:33:05,361 INFO L158 Benchmark]: Boogie Procedure Inliner took 21.85ms. Allocated memory is still 311.4MB. Free memory was 255.8MB in the beginning and 254.3MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-12-18 16:33:05,362 INFO L158 Benchmark]: Boogie Preprocessor took 27.08ms. Allocated memory is still 311.4MB. Free memory was 254.3MB in the beginning and 252.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-18 16:33:05,362 INFO L158 Benchmark]: RCFGBuilder took 331.79ms. Allocated memory is still 311.4MB. Free memory was 252.2MB in the beginning and 239.6MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2023-12-18 16:33:05,362 INFO L158 Benchmark]: TraceAbstraction took 869398.99ms. Allocated memory was 311.4MB in the beginning and 1.6GB in the end (delta: 1.3GB). Free memory was 239.1MB in the beginning and 1.1GB in the end (delta: -900.4MB). Peak memory consumption was 401.9MB. Max. memory is 8.0GB. [2023-12-18 16:33:05,363 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 186.6MB. Free memory is still 134.1MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 161.60ms. Allocated memory is still 311.4MB. Free memory was 266.9MB in the beginning and 255.8MB in the end (delta: 11.1MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 21.85ms. Allocated memory is still 311.4MB. Free memory was 255.8MB in the beginning and 254.3MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 27.08ms. Allocated memory is still 311.4MB. Free memory was 254.3MB in the beginning and 252.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 331.79ms. Allocated memory is still 311.4MB. Free memory was 252.2MB in the beginning and 239.6MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * TraceAbstraction took 869398.99ms. Allocated memory was 311.4MB in the beginning and 1.6GB in the end (delta: 1.3GB). Free memory was 239.1MB in the beginning and 1.1GB in the end (delta: -900.4MB). Peak memory consumption was 401.9MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 13]: Timeout (TraceAbstraction) Unable to prove that a call to reach_error is unreachable (line 13). Cancelled while NwaCegarLoop was constructing difference of abstraction (1807states) and FLOYD_HOARE automaton (currently 2 states, 259 states before enhancement),while ReachableStatesComputation was computing reachable states (1 states constructed, input type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 18 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 869.4s, OverallIterations: 20, TraceHistogramMax: 256, PathProgramHistogramMax: 11, EmptinessCheckTime: 0.0s, AutomataDifference: 44.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2561 SdHoareTripleChecker+Valid, 3.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2561 mSDsluCounter, 2872 SdHoareTripleChecker+Invalid, 2.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2553 mSDsCounter, 66 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 5740 IncrementalHoareTripleChecker+Invalid, 5806 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 66 mSolverCounterUnsat, 319 mSDtfsCounter, 5740 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 9506 GetRequests, 6937 SyntacticMatches, 0 SemanticMatches, 2569 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134150 ImplicationChecksByTransitivity, 136.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1807occurred in iteration=19, InterpolantAutomatonStates: 1897, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 19 MinimizatonAttempts, 910 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.8s SsaConstructionTime, 53.4s SatisfiabilityAnalysisTime, 185.8s InterpolantComputationTime, 8857 NumberOfCodeBlocks, 7688 NumberOfCodeBlocksAsserted, 165 NumberOfCheckSat, 12683 ConstructedInterpolants, 0 QuantifiedInterpolants, 59433 SizeOfPredicates, 60 NumberOfNonLiveVariables, 12244 ConjunctsInSsa, 634 ConjunctsInUnsatCore, 54 InterpolantComputations, 3 PerfectInterpolantSequences, 569367/773277 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown