/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/standard_allDiff2_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-18 16:18:40,224 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-18 16:18:40,275 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 16:18:40,279 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-18 16:18:40,280 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-18 16:18:40,310 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-18 16:18:40,311 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-18 16:18:40,311 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-18 16:18:40,311 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-18 16:18:40,314 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-18 16:18:40,314 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-18 16:18:40,314 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-18 16:18:40,315 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-18 16:18:40,316 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-18 16:18:40,316 INFO L153 SettingsManager]: * Use SBE=true [2023-12-18 16:18:40,316 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-18 16:18:40,316 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-18 16:18:40,317 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-18 16:18:40,317 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-18 16:18:40,318 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-18 16:18:40,318 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-18 16:18:40,318 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-18 16:18:40,318 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-18 16:18:40,318 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-18 16:18:40,319 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-18 16:18:40,319 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-18 16:18:40,319 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-18 16:18:40,319 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-18 16:18:40,319 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-18 16:18:40,320 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-18 16:18:40,320 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-18 16:18:40,320 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-18 16:18:40,321 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-18 16:18:40,321 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-18 16:18:40,321 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-18 16:18:40,321 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-18 16:18:40,321 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-18 16:18:40,321 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-18 16:18:40,321 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-18 16:18:40,321 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-18 16:18:40,322 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-18 16:18:40,322 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-18 16:18:40,322 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-18 16:18:40,322 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> true [2023-12-18 16:18:40,497 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-18 16:18:40,514 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-18 16:18:40,516 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-18 16:18:40,516 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-18 16:18:40,517 INFO L274 PluginConnector]: CDTParser initialized [2023-12-18 16:18:40,517 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_allDiff2_ground.i [2023-12-18 16:18:41,545 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-18 16:18:41,690 INFO L384 CDTParser]: Found 1 translation units. [2023-12-18 16:18:41,691 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_allDiff2_ground.i [2023-12-18 16:18:41,695 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/825c427d7/0f83b72feb1f44d2865e92489a65663f/FLAGb8a216556 [2023-12-18 16:18:41,708 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/825c427d7/0f83b72feb1f44d2865e92489a65663f [2023-12-18 16:18:41,710 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-18 16:18:41,711 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-18 16:18:41,712 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-18 16:18:41,712 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-18 16:18:41,716 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-18 16:18:41,716 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 04:18:41" (1/1) ... [2023-12-18 16:18:41,717 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@139da018 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 04:18:41, skipping insertion in model container [2023-12-18 16:18:41,717 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 04:18:41" (1/1) ... [2023-12-18 16:18:41,731 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-18 16:18:41,852 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/standard_allDiff2_ground.i[817,830] [2023-12-18 16:18:41,876 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-18 16:18:41,882 INFO L202 MainTranslator]: Completed pre-run [2023-12-18 16:18:41,891 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/standard_allDiff2_ground.i[817,830] [2023-12-18 16:18:41,905 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-18 16:18:41,915 INFO L206 MainTranslator]: Completed translation [2023-12-18 16:18:41,915 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 04:18:41 WrapperNode [2023-12-18 16:18:41,915 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-18 16:18:41,917 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-18 16:18:41,917 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-18 16:18:41,917 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-18 16:18:41,922 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 04:18:41" (1/1) ... [2023-12-18 16:18:41,928 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 04:18:41" (1/1) ... [2023-12-18 16:18:41,940 INFO L138 Inliner]: procedures = 16, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 85 [2023-12-18 16:18:41,941 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-18 16:18:41,941 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-18 16:18:41,941 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-18 16:18:41,941 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-18 16:18:41,949 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 04:18:41" (1/1) ... [2023-12-18 16:18:41,949 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 04:18:41" (1/1) ... [2023-12-18 16:18:41,958 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 04:18:41" (1/1) ... [2023-12-18 16:18:41,968 INFO L175 MemorySlicer]: Split 7 memory accesses to 2 slices as follows [2, 5]. 71 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2023-12-18 16:18:41,972 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 04:18:41" (1/1) ... [2023-12-18 16:18:41,973 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 04:18:41" (1/1) ... [2023-12-18 16:18:41,976 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 04:18:41" (1/1) ... [2023-12-18 16:18:41,978 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 04:18:41" (1/1) ... [2023-12-18 16:18:41,979 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 04:18:41" (1/1) ... [2023-12-18 16:18:41,979 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 04:18:41" (1/1) ... [2023-12-18 16:18:41,980 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-18 16:18:41,981 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-18 16:18:41,981 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-18 16:18:41,981 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-18 16:18:41,982 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 04:18:41" (1/1) ... [2023-12-18 16:18:41,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-18 16:18:41,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 16:18:42,005 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 16:18:42,017 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 16:18:42,032 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-18 16:18:42,032 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-18 16:18:42,033 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-12-18 16:18:42,033 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-18 16:18:42,033 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-12-18 16:18:42,033 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-12-18 16:18:42,033 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-18 16:18:42,033 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-18 16:18:42,033 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-12-18 16:18:42,033 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-12-18 16:18:42,033 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-18 16:18:42,081 INFO L241 CfgBuilder]: Building ICFG [2023-12-18 16:18:42,083 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-18 16:18:42,189 INFO L282 CfgBuilder]: Performing block encoding [2023-12-18 16:18:42,208 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-18 16:18:42,208 INFO L309 CfgBuilder]: Removed 5 assume(true) statements. [2023-12-18 16:18:42,208 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 04:18:42 BoogieIcfgContainer [2023-12-18 16:18:42,208 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-18 16:18:42,210 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-18 16:18:42,210 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-18 16:18:42,212 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-18 16:18:42,212 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.12 04:18:41" (1/3) ... [2023-12-18 16:18:42,213 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23746801 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 04:18:42, skipping insertion in model container [2023-12-18 16:18:42,213 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 04:18:41" (2/3) ... [2023-12-18 16:18:42,213 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23746801 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 04:18:42, skipping insertion in model container [2023-12-18 16:18:42,213 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 04:18:42" (3/3) ... [2023-12-18 16:18:42,214 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_allDiff2_ground.i [2023-12-18 16:18:42,226 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-18 16:18:42,226 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-18 16:18:42,254 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-18 16:18:42,258 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;@5b47c47c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-18 16:18:42,258 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-18 16:18:42,261 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 19 states have internal predecessors, (32), 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 16:18:42,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-12-18 16:18:42,270 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 16:18:42,270 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 16:18:42,270 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 16:18:42,274 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 16:18:42,274 INFO L85 PathProgramCache]: Analyzing trace with hash 993314077, now seen corresponding path program 1 times [2023-12-18 16:18:42,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 16:18:42,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944432140] [2023-12-18 16:18:42,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 16:18:42,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 16:18:42,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 16:18:42,401 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 16:18:42,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 16:18:42,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944432140] [2023-12-18 16:18:42,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944432140] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-18 16:18:42,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-18 16:18:42,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-18 16:18:42,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259101348] [2023-12-18 16:18:42,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-18 16:18:42,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-18 16:18:42,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 16:18:42,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-18 16:18:42,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-18 16:18:42,424 INFO L87 Difference]: Start difference. First operand has 20 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 19 states have internal predecessors, (32), 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 3.3333333333333335) internal successors, (10), 2 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 16:18:42,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 16:18:42,449 INFO L93 Difference]: Finished difference Result 39 states and 63 transitions. [2023-12-18 16:18:42,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-18 16:18:42,451 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 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 16:18:42,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 16:18:42,455 INFO L225 Difference]: With dead ends: 39 [2023-12-18 16:18:42,455 INFO L226 Difference]: Without dead ends: 18 [2023-12-18 16:18:42,457 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 16:18:42,460 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 16:18:42,461 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 38 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 16:18:42,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2023-12-18 16:18:42,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2023-12-18 16:18:42,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 17 states have internal predecessors, (23), 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 16:18:42,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 23 transitions. [2023-12-18 16:18:42,481 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 23 transitions. Word has length 10 [2023-12-18 16:18:42,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 16:18:42,481 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 23 transitions. [2023-12-18 16:18:42,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 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 16:18:42,482 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 23 transitions. [2023-12-18 16:18:42,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-12-18 16:18:42,482 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 16:18:42,482 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 16:18:42,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-18 16:18:42,484 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 16:18:42,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 16:18:42,485 INFO L85 PathProgramCache]: Analyzing trace with hash -876846921, now seen corresponding path program 1 times [2023-12-18 16:18:42,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 16:18:42,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421600917] [2023-12-18 16:18:42,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 16:18:42,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 16:18:42,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 16:18:42,568 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 16:18:42,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 16:18:42,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421600917] [2023-12-18 16:18:42,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421600917] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 16:18:42,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560171618] [2023-12-18 16:18:42,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 16:18:42,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 16:18:42,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 16:18:42,572 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 16:18:42,602 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 16:18:42,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 16:18:42,632 INFO L262 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-18 16:18:42,635 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 16:18:42,683 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 16:18:42,683 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-18 16:18:42,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560171618] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-18 16:18:42,685 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-18 16:18:42,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3] total 5 [2023-12-18 16:18:42,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063865116] [2023-12-18 16:18:42,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-18 16:18:42,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-18 16:18:42,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 16:18:42,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-18 16:18:42,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-18 16:18:42,688 INFO L87 Difference]: Start difference. First operand 18 states and 23 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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 16:18:42,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 16:18:42,744 INFO L93 Difference]: Finished difference Result 32 states and 41 transitions. [2023-12-18 16:18:42,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-18 16:18:42,745 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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 11 [2023-12-18 16:18:42,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 16:18:42,746 INFO L225 Difference]: With dead ends: 32 [2023-12-18 16:18:42,747 INFO L226 Difference]: Without dead ends: 23 [2023-12-18 16:18:42,747 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-12-18 16:18:42,749 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 8 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 16:18:42,750 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 40 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 16:18:42,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-12-18 16:18:42,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 19. [2023-12-18 16:18:42,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 states have internal predecessors, (24), 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 16:18:42,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2023-12-18 16:18:42,753 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 11 [2023-12-18 16:18:42,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 16:18:42,753 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2023-12-18 16:18:42,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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 16:18:42,753 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2023-12-18 16:18:42,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-12-18 16:18:42,754 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 16:18:42,754 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 16:18:42,764 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 16:18:42,954 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 16:18:42,955 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 16:18:42,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 16:18:42,955 INFO L85 PathProgramCache]: Analyzing trace with hash -1648555766, now seen corresponding path program 1 times [2023-12-18 16:18:42,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 16:18:42,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500732836] [2023-12-18 16:18:42,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 16:18:42,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 16:18:42,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 16:18:43,077 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 16:18:43,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 16:18:43,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500732836] [2023-12-18 16:18:43,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500732836] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 16:18:43,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628558190] [2023-12-18 16:18:43,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 16:18:43,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 16:18:43,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 16:18:43,083 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 16:18:43,100 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 16:18:43,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 16:18:43,134 INFO L262 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-18 16:18:43,135 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 16:18:43,150 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 16:18:43,150 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 16:18:43,172 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 16:18:43,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628558190] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 16:18:43,174 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 16:18:43,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-12-18 16:18:43,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62002776] [2023-12-18 16:18:43,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 16:18:43,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-18 16:18:43,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 16:18:43,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-18 16:18:43,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-12-18 16:18:43,177 INFO L87 Difference]: Start difference. First operand 19 states and 24 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 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 16:18:43,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 16:18:43,226 INFO L93 Difference]: Finished difference Result 66 states and 86 transitions. [2023-12-18 16:18:43,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-18 16:18:43,226 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 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 14 [2023-12-18 16:18:43,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 16:18:43,228 INFO L225 Difference]: With dead ends: 66 [2023-12-18 16:18:43,229 INFO L226 Difference]: Without dead ends: 50 [2023-12-18 16:18:43,229 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 24 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 16:18:43,231 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 46 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 16:18:43,232 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 63 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 16:18:43,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-12-18 16:18:43,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 22. [2023-12-18 16:18:43,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 21 states have internal predecessors, (27), 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 16:18:43,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2023-12-18 16:18:43,242 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 14 [2023-12-18 16:18:43,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 16:18:43,242 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2023-12-18 16:18:43,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 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 16:18:43,242 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2023-12-18 16:18:43,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-12-18 16:18:43,243 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 16:18:43,243 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 16:18:43,250 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-18 16:18:43,451 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 16:18:43,452 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 16:18:43,452 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 16:18:43,453 INFO L85 PathProgramCache]: Analyzing trace with hash 1558961252, now seen corresponding path program 2 times [2023-12-18 16:18:43,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 16:18:43,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62867492] [2023-12-18 16:18:43,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 16:18:43,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 16:18:43,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 16:18:43,586 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-18 16:18:43,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 16:18:43,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62867492] [2023-12-18 16:18:43,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62867492] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-18 16:18:43,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-18 16:18:43,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-18 16:18:43,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585917142] [2023-12-18 16:18:43,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-18 16:18:43,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-18 16:18:43,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 16:18:43,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-18 16:18:43,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-18 16:18:43,588 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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 16:18:43,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 16:18:43,614 INFO L93 Difference]: Finished difference Result 43 states and 56 transitions. [2023-12-18 16:18:43,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-18 16:18:43,615 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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 17 [2023-12-18 16:18:43,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 16:18:43,615 INFO L225 Difference]: With dead ends: 43 [2023-12-18 16:18:43,615 INFO L226 Difference]: Without dead ends: 29 [2023-12-18 16:18:43,616 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-18 16:18:43,616 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 12 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 16:18:43,616 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 38 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 16:18:43,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-12-18 16:18:43,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 23. [2023-12-18 16:18:43,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 22 states have internal predecessors, (28), 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 16:18:43,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2023-12-18 16:18:43,620 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 17 [2023-12-18 16:18:43,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 16:18:43,620 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2023-12-18 16:18:43,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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 16:18:43,620 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2023-12-18 16:18:43,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-12-18 16:18:43,620 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 16:18:43,621 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 16:18:43,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-18 16:18:43,621 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 16:18:43,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 16:18:43,621 INFO L85 PathProgramCache]: Analyzing trace with hash -1158567996, now seen corresponding path program 1 times [2023-12-18 16:18:43,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 16:18:43,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325417872] [2023-12-18 16:18:43,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 16:18:43,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 16:18:43,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 16:18:43,744 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 16:18:43,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 16:18:43,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325417872] [2023-12-18 16:18:43,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325417872] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 16:18:43,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800909348] [2023-12-18 16:18:43,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 16:18:43,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 16:18:43,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 16:18:43,746 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 16:18:43,772 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 16:18:43,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 16:18:43,820 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-18 16:18:43,821 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 16:18:43,866 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 16:18:43,867 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 16:18:43,927 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 16:18:43,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800909348] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 16:18:43,927 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 16:18:43,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2023-12-18 16:18:43,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520559206] [2023-12-18 16:18:43,928 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 16:18:43,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-12-18 16:18:43,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 16:18:43,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-12-18 16:18:43,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=155, Unknown=0, NotChecked=0, Total=272 [2023-12-18 16:18:43,930 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 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 16:18:44,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 16:18:44,115 INFO L93 Difference]: Finished difference Result 86 states and 125 transitions. [2023-12-18 16:18:44,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-18 16:18:44,116 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 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 20 [2023-12-18 16:18:44,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 16:18:44,117 INFO L225 Difference]: With dead ends: 86 [2023-12-18 16:18:44,117 INFO L226 Difference]: Without dead ends: 69 [2023-12-18 16:18:44,118 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=259, Invalid=443, Unknown=0, NotChecked=0, Total=702 [2023-12-18 16:18:44,120 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 182 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 16:18:44,122 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [182 Valid, 58 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 16:18:44,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2023-12-18 16:18:44,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2023-12-18 16:18:44,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.3235294117647058) internal successors, (90), 68 states have internal predecessors, (90), 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 16:18:44,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 90 transitions. [2023-12-18 16:18:44,129 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 90 transitions. Word has length 20 [2023-12-18 16:18:44,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 16:18:44,129 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 90 transitions. [2023-12-18 16:18:44,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 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 16:18:44,130 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 90 transitions. [2023-12-18 16:18:44,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-12-18 16:18:44,130 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 16:18:44,130 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 16:18:44,140 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 16:18:44,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 16:18:44,335 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 16:18:44,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 16:18:44,335 INFO L85 PathProgramCache]: Analyzing trace with hash 2125129476, now seen corresponding path program 2 times [2023-12-18 16:18:44,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 16:18:44,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731203962] [2023-12-18 16:18:44,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 16:18:44,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 16:18:44,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 16:18:44,493 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2023-12-18 16:18:44,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 16:18:44,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731203962] [2023-12-18 16:18:44,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731203962] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 16:18:44,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308127142] [2023-12-18 16:18:44,493 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-18 16:18:44,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 16:18:44,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 16:18:44,494 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 16:18:44,499 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 16:18:44,574 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-18 16:18:44,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 16:18:44,575 INFO L262 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-18 16:18:44,577 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 16:18:44,596 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2023-12-18 16:18:44,596 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 16:18:44,764 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2023-12-18 16:18:44,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308127142] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 16:18:44,765 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 16:18:44,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2023-12-18 16:18:44,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697380774] [2023-12-18 16:18:44,765 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 16:18:44,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-12-18 16:18:44,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 16:18:44,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-12-18 16:18:44,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-12-18 16:18:44,770 INFO L87 Difference]: Start difference. First operand 69 states and 90 transitions. Second operand has 25 states, 25 states have (on average 1.6) internal successors, (40), 24 states have internal predecessors, (40), 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 16:18:44,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 16:18:44,920 INFO L93 Difference]: Finished difference Result 306 states and 407 transitions. [2023-12-18 16:18:44,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-12-18 16:18:44,920 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.6) internal successors, (40), 24 states have internal predecessors, (40), 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 50 [2023-12-18 16:18:44,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 16:18:44,921 INFO L225 Difference]: With dead ends: 306 [2023-12-18 16:18:44,921 INFO L226 Difference]: Without dead ends: 249 [2023-12-18 16:18:44,922 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-12-18 16:18:44,922 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 757 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 757 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 16:18:44,922 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [757 Valid, 247 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 16:18:44,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2023-12-18 16:18:44,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 81. [2023-12-18 16:18:44,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.275) internal successors, (102), 80 states have internal predecessors, (102), 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 16:18:44,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 102 transitions. [2023-12-18 16:18:44,932 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 102 transitions. Word has length 50 [2023-12-18 16:18:44,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 16:18:44,933 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 102 transitions. [2023-12-18 16:18:44,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.6) internal successors, (40), 24 states have internal predecessors, (40), 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 16:18:44,933 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 102 transitions. [2023-12-18 16:18:44,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-12-18 16:18:44,934 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 16:18:44,934 INFO L195 NwaCegarLoop]: trace histogram [22, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 16:18:44,957 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-18 16:18:45,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 16:18:45,138 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 16:18:45,139 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 16:18:45,139 INFO L85 PathProgramCache]: Analyzing trace with hash 815327876, now seen corresponding path program 3 times [2023-12-18 16:18:45,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 16:18:45,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371613075] [2023-12-18 16:18:45,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 16:18:45,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 16:18:45,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 16:18:45,586 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2023-12-18 16:18:45,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 16:18:45,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371613075] [2023-12-18 16:18:45,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371613075] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 16:18:45,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304655135] [2023-12-18 16:18:45,586 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-18 16:18:45,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 16:18:45,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 16:18:45,602 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 16:18:45,606 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 16:18:45,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-18 16:18:45,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 16:18:45,667 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-18 16:18:45,668 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 16:18:45,753 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 353 trivial. 0 not checked. [2023-12-18 16:18:45,753 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-18 16:18:45,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304655135] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-18 16:18:45,754 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-18 16:18:45,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [24] total 29 [2023-12-18 16:18:45,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770091755] [2023-12-18 16:18:45,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-18 16:18:45,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-18 16:18:45,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 16:18:45,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-18 16:18:45,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=314, Invalid=498, Unknown=0, NotChecked=0, Total=812 [2023-12-18 16:18:45,755 INFO L87 Difference]: Start difference. First operand 81 states and 102 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 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 16:18:45,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 16:18:45,817 INFO L93 Difference]: Finished difference Result 170 states and 232 transitions. [2023-12-18 16:18:45,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-18 16:18:45,818 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 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 62 [2023-12-18 16:18:45,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 16:18:45,818 INFO L225 Difference]: With dead ends: 170 [2023-12-18 16:18:45,818 INFO L226 Difference]: Without dead ends: 161 [2023-12-18 16:18:45,819 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=324, Invalid=606, Unknown=0, NotChecked=0, Total=930 [2023-12-18 16:18:45,819 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 13 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 16:18:45,820 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 36 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 16:18:45,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2023-12-18 16:18:45,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 82. [2023-12-18 16:18:45,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.2839506172839505) internal successors, (104), 81 states have internal predecessors, (104), 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 16:18:45,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 104 transitions. [2023-12-18 16:18:45,828 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 104 transitions. Word has length 62 [2023-12-18 16:18:45,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 16:18:45,828 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 104 transitions. [2023-12-18 16:18:45,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 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 16:18:45,829 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 104 transitions. [2023-12-18 16:18:45,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-12-18 16:18:45,829 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 16:18:45,829 INFO L195 NwaCegarLoop]: trace histogram [22, 9, 9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 16:18:45,836 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-12-18 16:18:46,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 16:18:46,034 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 16:18:46,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 16:18:46,034 INFO L85 PathProgramCache]: Analyzing trace with hash -1299159644, now seen corresponding path program 4 times [2023-12-18 16:18:46,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 16:18:46,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879188206] [2023-12-18 16:18:46,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 16:18:46,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 16:18:46,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 16:18:46,541 INFO L134 CoverageAnalysis]: Checked inductivity of 391 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2023-12-18 16:18:46,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 16:18:46,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879188206] [2023-12-18 16:18:46,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879188206] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 16:18:46,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799757547] [2023-12-18 16:18:46,541 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-18 16:18:46,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 16:18:46,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 16:18:46,558 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 16:18:46,567 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 16:18:46,654 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-18 16:18:46,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 16:18:46,656 INFO L262 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-18 16:18:46,657 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 16:18:46,699 INFO L134 CoverageAnalysis]: Checked inductivity of 391 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 255 trivial. 0 not checked. [2023-12-18 16:18:46,699 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 16:18:46,963 INFO L134 CoverageAnalysis]: Checked inductivity of 391 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 255 trivial. 0 not checked. [2023-12-18 16:18:46,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799757547] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 16:18:46,963 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 16:18:46,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 13, 13] total 36 [2023-12-18 16:18:46,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605432254] [2023-12-18 16:18:46,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 16:18:46,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-12-18 16:18:46,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 16:18:46,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-12-18 16:18:46,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2023-12-18 16:18:46,965 INFO L87 Difference]: Start difference. First operand 82 states and 104 transitions. Second operand has 36 states, 36 states have (on average 3.138888888888889) internal successors, (113), 36 states have internal predecessors, (113), 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 16:18:47,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 16:18:47,475 INFO L93 Difference]: Finished difference Result 383 states and 529 transitions. [2023-12-18 16:18:47,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2023-12-18 16:18:47,475 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 3.138888888888889) internal successors, (113), 36 states have internal predecessors, (113), 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 16:18:47,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 16:18:47,477 INFO L225 Difference]: With dead ends: 383 [2023-12-18 16:18:47,477 INFO L226 Difference]: Without dead ends: 279 [2023-12-18 16:18:47,479 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1195, Invalid=2227, Unknown=0, NotChecked=0, Total=3422 [2023-12-18 16:18:47,479 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 462 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 462 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 16:18:47,479 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [462 Valid, 221 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 16:18:47,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2023-12-18 16:18:47,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 208. [2023-12-18 16:18:47,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 1.3333333333333333) internal successors, (276), 207 states have internal predecessors, (276), 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 16:18:47,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 276 transitions. [2023-12-18 16:18:47,534 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 276 transitions. Word has length 65 [2023-12-18 16:18:47,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 16:18:47,534 INFO L495 AbstractCegarLoop]: Abstraction has 208 states and 276 transitions. [2023-12-18 16:18:47,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 3.138888888888889) internal successors, (113), 36 states have internal predecessors, (113), 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 16:18:47,534 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 276 transitions. [2023-12-18 16:18:47,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2023-12-18 16:18:47,539 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 16:18:47,539 INFO L195 NwaCegarLoop]: trace histogram [33, 32, 32, 32, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 16:18:47,560 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 16:18:47,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 16:18:47,740 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 16:18:47,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 16:18:47,740 INFO L85 PathProgramCache]: Analyzing trace with hash 632352997, now seen corresponding path program 5 times [2023-12-18 16:18:47,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 16:18:47,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250689506] [2023-12-18 16:18:47,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 16:18:47,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 16:18:47,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 16:18:48,679 INFO L134 CoverageAnalysis]: Checked inductivity of 2148 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 1587 trivial. 0 not checked. [2023-12-18 16:18:48,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 16:18:48,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250689506] [2023-12-18 16:18:48,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250689506] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 16:18:48,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934738073] [2023-12-18 16:18:48,679 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-18 16:18:48,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 16:18:48,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 16:18:48,680 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 16:18:48,689 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 16:18:49,605 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2023-12-18 16:18:49,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 16:18:49,610 INFO L262 TraceCheckSpWp]: Trace formula consists of 547 conjuncts, 35 conjunts are in the unsatisfiable core [2023-12-18 16:18:49,613 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 16:18:50,584 INFO L134 CoverageAnalysis]: Checked inductivity of 2148 backedges. 1523 proven. 61 refuted. 0 times theorem prover too weak. 564 trivial. 0 not checked. [2023-12-18 16:18:50,584 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 16:18:51,817 INFO L134 CoverageAnalysis]: Checked inductivity of 2148 backedges. 1553 proven. 31 refuted. 0 times theorem prover too weak. 564 trivial. 0 not checked. [2023-12-18 16:18:51,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934738073] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 16:18:51,818 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 16:18:51,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 36, 36] total 104 [2023-12-18 16:18:51,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621513930] [2023-12-18 16:18:51,818 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 16:18:51,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2023-12-18 16:18:51,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 16:18:51,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2023-12-18 16:18:51,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2622, Invalid=8090, Unknown=0, NotChecked=0, Total=10712 [2023-12-18 16:18:51,823 INFO L87 Difference]: Start difference. First operand 208 states and 276 transitions. Second operand has 104 states, 104 states have (on average 2.3365384615384617) internal successors, (243), 104 states have internal predecessors, (243), 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 16:18:54,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 16:18:54,211 INFO L93 Difference]: Finished difference Result 435 states and 616 transitions. [2023-12-18 16:18:54,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2023-12-18 16:18:54,211 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 2.3365384615384617) internal successors, (243), 104 states have internal predecessors, (243), 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 145 [2023-12-18 16:18:54,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 16:18:54,212 INFO L225 Difference]: With dead ends: 435 [2023-12-18 16:18:54,212 INFO L226 Difference]: Without dead ends: 262 [2023-12-18 16:18:54,220 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 429 GetRequests, 221 SyntacticMatches, 0 SemanticMatches, 208 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11017 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=10259, Invalid=33631, Unknown=0, NotChecked=0, Total=43890 [2023-12-18 16:18:54,220 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 1839 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 1708 mSolverCounterSat, 544 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1839 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 2252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 544 IncrementalHoareTripleChecker+Valid, 1708 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-18 16:18:54,220 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1839 Valid, 422 Invalid, 2252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [544 Valid, 1708 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-12-18 16:18:54,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2023-12-18 16:18:54,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 254. [2023-12-18 16:18:54,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 253 states have (on average 1.2885375494071147) internal successors, (326), 253 states have internal predecessors, (326), 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 16:18:54,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 326 transitions. [2023-12-18 16:18:54,264 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 326 transitions. Word has length 145 [2023-12-18 16:18:54,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 16:18:54,264 INFO L495 AbstractCegarLoop]: Abstraction has 254 states and 326 transitions. [2023-12-18 16:18:54,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 2.3365384615384617) internal successors, (243), 104 states have internal predecessors, (243), 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 16:18:54,264 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 326 transitions. [2023-12-18 16:18:54,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2023-12-18 16:18:54,268 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 16:18:54,268 INFO L195 NwaCegarLoop]: trace histogram [36, 36, 36, 34, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 16:18:54,277 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 16:18:54,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 16:18:54,477 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 16:18:54,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 16:18:54,477 INFO L85 PathProgramCache]: Analyzing trace with hash 274811826, now seen corresponding path program 6 times [2023-12-18 16:18:54,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 16:18:54,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082993475] [2023-12-18 16:18:54,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 16:18:54,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 16:18:54,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 16:18:55,565 INFO L134 CoverageAnalysis]: Checked inductivity of 5290 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 4695 trivial. 0 not checked. [2023-12-18 16:18:55,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 16:18:55,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082993475] [2023-12-18 16:18:55,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082993475] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 16:18:55,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108762360] [2023-12-18 16:18:55,567 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-18 16:18:55,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 16:18:55,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 16:18:55,568 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 16:18:55,596 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 16:18:55,713 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2023-12-18 16:18:55,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 16:18:55,715 INFO L262 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-18 16:18:55,718 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 16:18:55,847 INFO L134 CoverageAnalysis]: Checked inductivity of 5290 backedges. 2278 proven. 14 refuted. 0 times theorem prover too weak. 2998 trivial. 0 not checked. [2023-12-18 16:18:55,847 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 16:18:55,954 INFO L134 CoverageAnalysis]: Checked inductivity of 5290 backedges. 2279 proven. 13 refuted. 0 times theorem prover too weak. 2998 trivial. 0 not checked. [2023-12-18 16:18:55,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108762360] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 16:18:55,954 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 16:18:55,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 8, 8] total 44 [2023-12-18 16:18:55,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447203972] [2023-12-18 16:18:55,954 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 16:18:55,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-12-18 16:18:55,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 16:18:55,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-12-18 16:18:55,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=685, Invalid=1207, Unknown=0, NotChecked=0, Total=1892 [2023-12-18 16:18:55,956 INFO L87 Difference]: Start difference. First operand 254 states and 326 transitions. Second operand has 44 states, 44 states have (on average 1.7272727272727273) internal successors, (76), 44 states have internal predecessors, (76), 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 16:18:59,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 16:18:59,928 INFO L93 Difference]: Finished difference Result 637 states and 846 transitions. [2023-12-18 16:18:59,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 174 states. [2023-12-18 16:18:59,928 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.7272727272727273) internal successors, (76), 44 states have internal predecessors, (76), 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 251 [2023-12-18 16:18:59,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 16:18:59,929 INFO L225 Difference]: With dead ends: 637 [2023-12-18 16:18:59,929 INFO L226 Difference]: Without dead ends: 359 [2023-12-18 16:18:59,935 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 776 GetRequests, 560 SyntacticMatches, 4 SemanticMatches, 212 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15735 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=12642, Invalid=32940, Unknown=0, NotChecked=0, Total=45582 [2023-12-18 16:18:59,936 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 2399 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 474 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2399 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 474 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-18 16:18:59,936 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2399 Valid, 144 Invalid, 788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [474 Valid, 314 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-18 16:18:59,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2023-12-18 16:18:59,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 351. [2023-12-18 16:18:59,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 350 states have (on average 1.3) internal successors, (455), 350 states have internal predecessors, (455), 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 16:18:59,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 455 transitions. [2023-12-18 16:18:59,968 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 455 transitions. Word has length 251 [2023-12-18 16:18:59,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 16:18:59,968 INFO L495 AbstractCegarLoop]: Abstraction has 351 states and 455 transitions. [2023-12-18 16:18:59,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.7272727272727273) internal successors, (76), 44 states have internal predecessors, (76), 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 16:18:59,969 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 455 transitions. [2023-12-18 16:18:59,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 349 [2023-12-18 16:18:59,971 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 16:18:59,971 INFO L195 NwaCegarLoop]: trace histogram [67, 67, 67, 35, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 16:18:59,975 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 16:19:00,175 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,SelfDestructingSolverStorable9 [2023-12-18 16:19:00,176 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 16:19:00,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 16:19:00,176 INFO L85 PathProgramCache]: Analyzing trace with hash 325026051, now seen corresponding path program 7 times [2023-12-18 16:19:00,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 16:19:00,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005401743] [2023-12-18 16:19:00,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 16:19:00,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 16:19:00,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 16:19:01,417 INFO L134 CoverageAnalysis]: Checked inductivity of 11258 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 10628 trivial. 0 not checked. [2023-12-18 16:19:01,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 16:19:01,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005401743] [2023-12-18 16:19:01,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005401743] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 16:19:01,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882804339] [2023-12-18 16:19:01,418 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-18 16:19:01,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 16:19:01,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 16:19:01,419 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 16:19:01,460 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 16:19:01,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 16:19:01,687 INFO L262 TraceCheckSpWp]: Trace formula consists of 1413 conjuncts, 37 conjunts are in the unsatisfiable core [2023-12-18 16:19:01,691 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 16:19:01,747 INFO L134 CoverageAnalysis]: Checked inductivity of 11258 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 10628 trivial. 0 not checked. [2023-12-18 16:19:01,747 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 16:19:02,825 INFO L134 CoverageAnalysis]: Checked inductivity of 11258 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 10628 trivial. 0 not checked. [2023-12-18 16:19:02,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882804339] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 16:19:02,825 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 16:19:02,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 74 [2023-12-18 16:19:02,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770524012] [2023-12-18 16:19:02,826 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 16:19:02,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2023-12-18 16:19:02,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 16:19:02,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2023-12-18 16:19:02,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2023-12-18 16:19:02,830 INFO L87 Difference]: Start difference. First operand 351 states and 455 transitions. Second operand has 75 states, 75 states have (on average 1.2) internal successors, (90), 74 states have internal predecessors, (90), 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 16:19:03,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 16:19:03,958 INFO L93 Difference]: Finished difference Result 1368 states and 1797 transitions. [2023-12-18 16:19:03,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2023-12-18 16:19:03,958 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 1.2) internal successors, (90), 74 states have internal predecessors, (90), 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 348 [2023-12-18 16:19:03,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 16:19:03,961 INFO L225 Difference]: With dead ends: 1368 [2023-12-18 16:19:03,961 INFO L226 Difference]: Without dead ends: 1054 [2023-12-18 16:19:03,962 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 731 GetRequests, 658 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2023-12-18 16:19:03,962 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 2866 mSDsluCounter, 644 mSDsCounter, 0 mSdLazyCounter, 382 mSolverCounterSat, 289 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2866 SdHoareTripleChecker+Valid, 659 SdHoareTripleChecker+Invalid, 671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 289 IncrementalHoareTripleChecker+Valid, 382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-18 16:19:03,962 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2866 Valid, 659 Invalid, 671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [289 Valid, 382 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-18 16:19:03,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1054 states. [2023-12-18 16:19:03,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1054 to 388. [2023-12-18 16:19:04,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 387 states have (on average 1.2713178294573644) internal successors, (492), 387 states have internal predecessors, (492), 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 16:19:04,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 492 transitions. [2023-12-18 16:19:04,001 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 492 transitions. Word has length 348 [2023-12-18 16:19:04,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 16:19:04,001 INFO L495 AbstractCegarLoop]: Abstraction has 388 states and 492 transitions. [2023-12-18 16:19:04,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 1.2) internal successors, (90), 74 states have internal predecessors, (90), 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 16:19:04,001 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 492 transitions. [2023-12-18 16:19:04,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 386 [2023-12-18 16:19:04,004 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 16:19:04,004 INFO L195 NwaCegarLoop]: trace histogram [72, 67, 67, 67, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 16:19:04,029 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 16:19:04,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 16:19:04,228 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 16:19:04,229 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 16:19:04,229 INFO L85 PathProgramCache]: Analyzing trace with hash -1091289187, now seen corresponding path program 8 times [2023-12-18 16:19:04,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 16:19:04,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862027193] [2023-12-18 16:19:04,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 16:19:04,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 16:19:04,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 16:19:07,698 INFO L134 CoverageAnalysis]: Checked inductivity of 13256 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 10628 trivial. 0 not checked. [2023-12-18 16:19:07,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 16:19:07,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862027193] [2023-12-18 16:19:07,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862027193] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 16:19:07,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043263069] [2023-12-18 16:19:07,699 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-18 16:19:07,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 16:19:07,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 16:19:07,700 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 16:19:07,701 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 16:19:08,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-18 16:19:08,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 16:19:08,031 INFO L262 TraceCheckSpWp]: Trace formula consists of 1746 conjuncts, 74 conjunts are in the unsatisfiable core [2023-12-18 16:19:08,039 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 16:19:08,154 INFO L134 CoverageAnalysis]: Checked inductivity of 13256 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 10628 trivial. 0 not checked. [2023-12-18 16:19:08,154 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 16:19:12,922 INFO L134 CoverageAnalysis]: Checked inductivity of 13256 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 10628 trivial. 0 not checked. [2023-12-18 16:19:12,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043263069] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 16:19:12,923 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 16:19:12,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74, 74] total 148 [2023-12-18 16:19:12,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633502118] [2023-12-18 16:19:12,923 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 16:19:12,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 149 states [2023-12-18 16:19:12,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 16:19:12,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 149 interpolants. [2023-12-18 16:19:12,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11026, Invalid=11026, Unknown=0, NotChecked=0, Total=22052 [2023-12-18 16:19:12,928 INFO L87 Difference]: Start difference. First operand 388 states and 492 transitions. Second operand has 149 states, 149 states have (on average 1.1006711409395973) internal successors, (164), 148 states have internal predecessors, (164), 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 16:19:24,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 16:19:24,413 INFO L93 Difference]: Finished difference Result 2774 states and 3610 transitions. [2023-12-18 16:19:24,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2023-12-18 16:19:24,413 INFO L78 Accepts]: Start accepts. Automaton has has 149 states, 149 states have (on average 1.1006711409395973) internal successors, (164), 148 states have internal predecessors, (164), 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 385 [2023-12-18 16:19:24,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 16:19:24,419 INFO L225 Difference]: With dead ends: 2774 [2023-12-18 16:19:24,419 INFO L226 Difference]: Without dead ends: 2460 [2023-12-18 16:19:24,420 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 842 GetRequests, 695 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=11026, Invalid=11026, Unknown=0, NotChecked=0, Total=22052 [2023-12-18 16:19:24,421 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 9821 mSDsluCounter, 1646 mSDsCounter, 0 mSdLazyCounter, 831 mSolverCounterSat, 724 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9821 SdHoareTripleChecker+Valid, 1661 SdHoareTripleChecker+Invalid, 1555 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 724 IncrementalHoareTripleChecker+Valid, 831 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-12-18 16:19:24,421 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9821 Valid, 1661 Invalid, 1555 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [724 Valid, 831 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-12-18 16:19:24,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2460 states. [2023-12-18 16:19:24,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2460 to 462. [2023-12-18 16:19:24,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 462 states, 461 states have (on average 1.227765726681128) internal successors, (566), 461 states have internal predecessors, (566), 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 16:19:24,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 566 transitions. [2023-12-18 16:19:24,475 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 566 transitions. Word has length 385 [2023-12-18 16:19:24,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 16:19:24,475 INFO L495 AbstractCegarLoop]: Abstraction has 462 states and 566 transitions. [2023-12-18 16:19:24,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 149 states, 149 states have (on average 1.1006711409395973) internal successors, (164), 148 states have internal predecessors, (164), 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 16:19:24,476 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 566 transitions. [2023-12-18 16:19:24,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 460 [2023-12-18 16:19:24,477 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 16:19:24,477 INFO L195 NwaCegarLoop]: trace histogram [146, 67, 67, 67, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 16:19:24,486 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 16:19:24,682 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,SelfDestructingSolverStorable11 [2023-12-18 16:19:24,682 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 16:19:24,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 16:19:24,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1491431261, now seen corresponding path program 9 times [2023-12-18 16:19:24,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 16:19:24,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101023192] [2023-12-18 16:19:24,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 16:19:24,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 16:19:24,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 16:19:36,619 INFO L134 CoverageAnalysis]: Checked inductivity of 21359 backedges. 0 proven. 10731 refuted. 0 times theorem prover too weak. 10628 trivial. 0 not checked. [2023-12-18 16:19:36,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 16:19:36,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101023192] [2023-12-18 16:19:36,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101023192] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 16:19:36,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564268322] [2023-12-18 16:19:36,620 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-18 16:19:36,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 16:19:36,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 16:19:36,622 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 16:19:36,624 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 16:19:36,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-12-18 16:19:36,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 16:19:36,920 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-18 16:19:36,924 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 16:19:37,270 INFO L134 CoverageAnalysis]: Checked inductivity of 21359 backedges. 621 proven. 5 refuted. 0 times theorem prover too weak. 20733 trivial. 0 not checked. [2023-12-18 16:19:37,270 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 16:19:37,814 INFO L134 CoverageAnalysis]: Checked inductivity of 21359 backedges. 621 proven. 5 refuted. 0 times theorem prover too weak. 20733 trivial. 0 not checked. [2023-12-18 16:19:37,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564268322] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 16:19:37,815 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 16:19:37,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [148, 8, 8] total 160 [2023-12-18 16:19:37,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472073109] [2023-12-18 16:19:37,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 16:19:37,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 160 states [2023-12-18 16:19:37,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 16:19:37,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 160 interpolants. [2023-12-18 16:19:37,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11815, Invalid=13625, Unknown=0, NotChecked=0, Total=25440 [2023-12-18 16:19:37,819 INFO L87 Difference]: Start difference. First operand 462 states and 566 transitions. Second operand has 160 states, 160 states have (on average 1.2125) internal successors, (194), 160 states have internal predecessors, (194), 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 16:21:34,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 16:21:34,815 INFO L93 Difference]: Finished difference Result 11016 states and 15255 transitions. [2023-12-18 16:21:34,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 1040 states. [2023-12-18 16:21:34,815 INFO L78 Accepts]: Start accepts. Automaton has has 160 states, 160 states have (on average 1.2125) internal successors, (194), 160 states have internal predecessors, (194), 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 459 [2023-12-18 16:21:34,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 16:21:34,847 INFO L225 Difference]: With dead ends: 11016 [2023-12-18 16:21:34,847 INFO L226 Difference]: Without dead ends: 10410 [2023-12-18 16:21:34,921 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2393 GetRequests, 1352 SyntacticMatches, 0 SemanticMatches, 1041 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426651 ImplicationChecksByTransitivity, 64.9s TimeCoverageRelationStatistics Valid=220360, Invalid=866446, Unknown=0, NotChecked=0, Total=1086806 [2023-12-18 16:21:34,922 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 16887 mSDsluCounter, 504 mSDsCounter, 0 mSdLazyCounter, 1137 mSolverCounterSat, 2254 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16887 SdHoareTripleChecker+Valid, 516 SdHoareTripleChecker+Invalid, 3391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2254 IncrementalHoareTripleChecker+Valid, 1137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-12-18 16:21:34,922 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16887 Valid, 516 Invalid, 3391 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2254 Valid, 1137 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-12-18 16:21:34,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10410 states. [2023-12-18 16:21:36,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10410 to 1939. [2023-12-18 16:21:36,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1939 states, 1938 states have (on average 1.3849329205366356) internal successors, (2684), 1938 states have internal predecessors, (2684), 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 16:21:36,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1939 states to 1939 states and 2684 transitions. [2023-12-18 16:21:36,461 INFO L78 Accepts]: Start accepts. Automaton has 1939 states and 2684 transitions. Word has length 459 [2023-12-18 16:21:36,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 16:21:36,462 INFO L495 AbstractCegarLoop]: Abstraction has 1939 states and 2684 transitions. [2023-12-18 16:21:36,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 160 states, 160 states have (on average 1.2125) internal successors, (194), 160 states have internal predecessors, (194), 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 16:21:36,462 INFO L276 IsEmpty]: Start isEmpty. Operand 1939 states and 2684 transitions. [2023-12-18 16:21:36,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1924 [2023-12-18 16:21:36,500 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 16:21:36,501 INFO L195 NwaCegarLoop]: trace histogram [441, 441, 441, 149, 147, 147, 147, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 16:21:36,510 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 16:21:36,706 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,SelfDestructingSolverStorable12 [2023-12-18 16:21:36,707 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 16:21:36,707 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 16:21:36,707 INFO L85 PathProgramCache]: Analyzing trace with hash -140513394, now seen corresponding path program 10 times [2023-12-18 16:21:36,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 16:21:36,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354693769] [2023-12-18 16:21:36,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 16:21:36,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 16:21:37,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 16:22:07,205 INFO L134 CoverageAnalysis]: Checked inductivity of 399402 backedges. 0 proven. 11175 refuted. 0 times theorem prover too weak. 388227 trivial. 0 not checked. [2023-12-18 16:22:07,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 16:22:07,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354693769] [2023-12-18 16:22:07,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354693769] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 16:22:07,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862250806] [2023-12-18 16:22:07,206 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-18 16:22:07,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 16:22:07,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 16:22:07,207 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 16:22:07,209 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 16:22:08,509 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-18 16:22:08,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 16:22:08,547 INFO L262 TraceCheckSpWp]: Trace formula consists of 7718 conjuncts, 150 conjunts are in the unsatisfiable core [2023-12-18 16:22:08,568 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 16:22:10,150 INFO L134 CoverageAnalysis]: Checked inductivity of 399402 backedges. 0 proven. 386442 refuted. 0 times theorem prover too weak. 12960 trivial. 0 not checked. [2023-12-18 16:22:10,150 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 16:22:25,606 INFO L134 CoverageAnalysis]: Checked inductivity of 399402 backedges. 0 proven. 386442 refuted. 0 times theorem prover too weak. 12960 trivial. 0 not checked. [2023-12-18 16:22:25,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862250806] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 16:22:25,606 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 16:22:25,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [151, 151, 151] total 301 [2023-12-18 16:22:25,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235961689] [2023-12-18 16:22:25,607 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 16:22:25,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 301 states [2023-12-18 16:22:25,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 16:22:25,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 301 interpolants. [2023-12-18 16:22:25,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44852, Invalid=45448, Unknown=0, NotChecked=0, Total=90300 [2023-12-18 16:22:25,623 INFO L87 Difference]: Start difference. First operand 1939 states and 2684 transitions. Second operand has 301 states, 301 states have (on average 6.438538205980066) internal successors, (1938), 301 states have internal predecessors, (1938), 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 16:27:53,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 16:27:53,885 INFO L93 Difference]: Finished difference Result 394344 states and 558881 transitions. [2023-12-18 16:27:53,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 450 states. [2023-12-18 16:27:53,886 INFO L78 Accepts]: Start accepts. Automaton has has 301 states, 301 states have (on average 6.438538205980066) internal successors, (1938), 301 states have internal predecessors, (1938), 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 1923 [2023-12-18 16:27:53,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 16:27:54,801 INFO L225 Difference]: With dead ends: 394344 [2023-12-18 16:27:54,801 INFO L226 Difference]: Without dead ends: 392256 [2023-12-18 16:27:55,220 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4145 GetRequests, 3696 SyntacticMatches, 0 SemanticMatches, 449 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22055 ImplicationChecksByTransitivity, 30.1s TimeCoverageRelationStatistics Valid=67802, Invalid=135148, Unknown=0, NotChecked=0, Total=202950 [2023-12-18 16:27:55,221 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 2804 mSDsluCounter, 1413 mSDsCounter, 0 mSdLazyCounter, 1379 mSolverCounterSat, 783 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2804 SdHoareTripleChecker+Valid, 1428 SdHoareTripleChecker+Invalid, 2162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 783 IncrementalHoareTripleChecker+Valid, 1379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-12-18 16:27:55,224 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2804 Valid, 1428 Invalid, 2162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [783 Valid, 1379 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-12-18 16:27:55,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392256 states. [2023-12-18 16:28:08,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392256 to 5169. [2023-12-18 16:28:08,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5169 states, 5168 states have (on average 1.3711300309597523) internal successors, (7086), 5168 states have internal predecessors, (7086), 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 16:28:08,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5169 states to 5169 states and 7086 transitions. [2023-12-18 16:28:08,821 INFO L78 Accepts]: Start accepts. Automaton has 5169 states and 7086 transitions. Word has length 1923 [2023-12-18 16:28:08,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 16:28:08,821 INFO L495 AbstractCegarLoop]: Abstraction has 5169 states and 7086 transitions. [2023-12-18 16:28:08,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 301 states, 301 states have (on average 6.438538205980066) internal successors, (1938), 301 states have internal predecessors, (1938), 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 16:28:08,822 INFO L276 IsEmpty]: Start isEmpty. Operand 5169 states and 7086 transitions. [2023-12-18 16:28:08,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3423 [2023-12-18 16:28:08,882 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 16:28:08,883 INFO L195 NwaCegarLoop]: trace histogram [741, 741, 741, 298, 297, 297, 297, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 16:28:08,900 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 16:28:09,096 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,SelfDestructingSolverStorable13 [2023-12-18 16:28:09,096 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 16:28:09,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 16:28:09,097 INFO L85 PathProgramCache]: Analyzing trace with hash 705889044, now seen corresponding path program 11 times [2023-12-18 16:28:09,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 16:28:09,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836460796] [2023-12-18 16:28:09,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 16:28:09,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 16:28:10,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 16:30:54,463 INFO L134 CoverageAnalysis]: Checked inductivity of 1219303 backedges. 0 proven. 44551 refuted. 0 times theorem prover too weak. 1174752 trivial. 0 not checked. [2023-12-18 16:30:54,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 16:30:54,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836460796] [2023-12-18 16:30:54,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836460796] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 16:30:54,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846643306] [2023-12-18 16:30:54,463 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-18 16:30:54,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 16:30:54,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 16:30:54,465 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 16:30:54,466 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 16:30:55,218 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-12-18 16:30:55,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 16:30:55,225 INFO L262 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-18 16:30:55,249 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 16:30:55,830 INFO L134 CoverageAnalysis]: Checked inductivity of 1219303 backedges. 399695 proven. 34 refuted. 0 times theorem prover too weak. 819574 trivial. 0 not checked. [2023-12-18 16:30:55,831 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 16:30:56,632 INFO L134 CoverageAnalysis]: Checked inductivity of 1219303 backedges. 399699 proven. 30 refuted. 0 times theorem prover too weak. 819574 trivial. 0 not checked. [2023-12-18 16:30:56,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846643306] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 16:30:56,632 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 16:30:56,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [300, 10, 10] total 311 [2023-12-18 16:30:56,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34777525] [2023-12-18 16:30:56,633 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 16:30:56,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 311 states [2023-12-18 16:30:56,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 16:30:56,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 311 interpolants. [2023-12-18 16:30:56,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45183, Invalid=51227, Unknown=0, NotChecked=0, Total=96410 [2023-12-18 16:30:56,649 INFO L87 Difference]: Start difference. First operand 5169 states and 7086 transitions. Second operand has 311 states, 311 states have (on average 1.1221864951768488) internal successors, (349), 311 states have internal predecessors, (349), 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) Received shutdown request... [2023-12-18 16:32:52,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 694 states. [2023-12-18 16:32:52,903 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7768 GetRequests, 7061 SyntacticMatches, 5 SemanticMatches, 701 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87383 ImplicationChecksByTransitivity, 42.3s TimeCoverageRelationStatistics Valid=179756, Invalid=313750, Unknown=0, NotChecked=0, Total=493506 [2023-12-18 16:32:52,904 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 9554 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 1002 mSolverCounterSat, 1303 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9554 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 2305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1303 IncrementalHoareTripleChecker+Valid, 1002 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-12-18 16:32:52,904 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9554 Valid, 368 Invalid, 2305 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1303 Valid, 1002 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-12-18 16:32:52,906 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-18 16:32:52,907 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 16:32:52,907 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-18 16:32:52,911 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-12-18 16:32:53,107 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,SelfDestructingSolverStorable14 [2023-12-18 16:32:53,108 WARN L619 AbstractCegarLoop]: Verification canceled: while NwaCegarLoop was constructing difference of abstraction (5169states) and FLOYD_HOARE automaton (currently 694 states, 311 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 703 known predicates. [2023-12-18 16:32:53,111 INFO L445 BasicCegarLoop]: Path program histogram: [11, 2, 1, 1] [2023-12-18 16:32:53,113 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-12-18 16:32:53,114 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.12 04:32:53 BoogieIcfgContainer [2023-12-18 16:32:53,114 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-18 16:32:53,115 INFO L158 Benchmark]: Toolchain (without parser) took 851403.59ms. Allocated memory was 325.1MB in the beginning and 2.4GB in the end (delta: 2.1GB). Free memory was 278.8MB in the beginning and 948.5MB in the end (delta: -669.8MB). Peak memory consumption was 1.4GB. Max. memory is 8.0GB. [2023-12-18 16:32:53,115 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 189.8MB. Free memory was 138.2MB in the beginning and 138.1MB in the end (delta: 150.3kB). There was no memory consumed. Max. memory is 8.0GB. [2023-12-18 16:32:53,115 INFO L158 Benchmark]: CACSL2BoogieTranslator took 203.61ms. Allocated memory is still 325.1MB. Free memory was 278.8MB in the beginning and 267.2MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-12-18 16:32:53,115 INFO L158 Benchmark]: Boogie Procedure Inliner took 24.16ms. Allocated memory is still 325.1MB. Free memory was 267.2MB in the beginning and 265.6MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-18 16:32:53,115 INFO L158 Benchmark]: Boogie Preprocessor took 39.21ms. Allocated memory is still 325.1MB. Free memory was 265.6MB in the beginning and 264.1MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-12-18 16:32:53,115 INFO L158 Benchmark]: RCFGBuilder took 227.48ms. Allocated memory is still 325.1MB. Free memory was 264.1MB in the beginning and 251.0MB in the end (delta: 13.1MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. [2023-12-18 16:32:53,116 INFO L158 Benchmark]: TraceAbstraction took 850904.48ms. Allocated memory was 325.1MB in the beginning and 2.4GB in the end (delta: 2.1GB). Free memory was 249.9MB in the beginning and 948.5MB in the end (delta: -698.6MB). Peak memory consumption was 1.4GB. Max. memory is 8.0GB. [2023-12-18 16:32:53,116 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 189.8MB. Free memory was 138.2MB in the beginning and 138.1MB in the end (delta: 150.3kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 203.61ms. Allocated memory is still 325.1MB. Free memory was 278.8MB in the beginning and 267.2MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 24.16ms. Allocated memory is still 325.1MB. Free memory was 267.2MB in the beginning and 265.6MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 39.21ms. Allocated memory is still 325.1MB. Free memory was 265.6MB in the beginning and 264.1MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 227.48ms. Allocated memory is still 325.1MB. Free memory was 264.1MB in the beginning and 251.0MB in the end (delta: 13.1MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. * TraceAbstraction took 850904.48ms. Allocated memory was 325.1MB in the beginning and 2.4GB in the end (delta: 2.1GB). Free memory was 249.9MB in the beginning and 948.5MB in the end (delta: -698.6MB). Peak memory consumption was 1.4GB. 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 (5169states) and FLOYD_HOARE automaton (currently 694 states, 311 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 703 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 850.9s, OverallIterations: 15, TraceHistogramMax: 741, PathProgramHistogramMax: 11, EmptinessCheckTime: 0.1s, AutomataDifference: 583.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 47650 SdHoareTripleChecker+Valid, 7.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 47650 mSDsluCounter, 5939 SdHoareTripleChecker+Invalid, 5.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 5662 mSDsCounter, 6572 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 7293 IncrementalHoareTripleChecker+Invalid, 13865 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 6572 mSolverCounterUnsat, 277 mSDtfsCounter, 7293 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 17561 GetRequests, 14573 SyntacticMatches, 9 SemanticMatches, 2978 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 563811 ImplicationChecksByTransitivity, 153.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=5169occurred in iteration=14, InterpolantAutomatonStates: 2116, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 15.4s AutomataMinimizationTime, 14 MinimizatonAttempts, 398594 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.1s SsaConstructionTime, 3.6s SatisfiabilityAnalysisTime, 242.9s InterpolantComputationTime, 14337 NumberOfCodeBlocks, 10266 NumberOfCodeBlocksAsserted, 85 NumberOfCheckSat, 21380 ConstructedInterpolants, 0 QuantifiedInterpolants, 32259 SizeOfPredicates, 21 NumberOfNonLiveVariables, 12876 ConjunctsInSsa, 360 ConjunctsInUnsatCore, 39 InterpolantComputations, 4 PerfectInterpolantSequences, 4167145/5018577 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