/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.use.bitabs.translation false -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/eca-rers2012/Problem03_label12.c -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-20 15:04:43,443 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-20 15:04:43,489 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-12-20 15:04:43,493 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-20 15:04:43,494 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-20 15:04:43,511 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-20 15:04:43,512 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-20 15:04:43,512 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-20 15:04:43,513 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-20 15:04:43,513 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-20 15:04:43,514 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-20 15:04:43,514 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-20 15:04:43,515 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-20 15:04:43,515 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-20 15:04:43,515 INFO L153 SettingsManager]: * Use SBE=true [2023-12-20 15:04:43,516 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-20 15:04:43,516 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-20 15:04:43,516 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-20 15:04:43,517 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-20 15:04:43,517 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-20 15:04:43,517 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-20 15:04:43,518 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-20 15:04:43,518 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-20 15:04:43,519 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-20 15:04:43,519 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-20 15:04:43,519 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-20 15:04:43,520 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-20 15:04:43,520 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-20 15:04:43,520 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-20 15:04:43,521 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-20 15:04:43,521 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-20 15:04:43,521 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-20 15:04:43,521 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-20 15:04:43,522 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-20 15:04:43,522 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-20 15:04:43,522 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-20 15:04:43,523 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-20 15:04:43,523 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-20 15:04:43,523 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-20 15:04:43,523 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-20 15:04:43,524 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-20 15:04:43,528 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-20 15:04:43,529 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-20 15:04:43,529 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> false [2023-12-20 15:04:43,771 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-20 15:04:43,796 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-20 15:04:43,799 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-20 15:04:43,800 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-20 15:04:43,800 INFO L274 PluginConnector]: CDTParser initialized [2023-12-20 15:04:43,801 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label12.c [2023-12-20 15:04:45,065 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-20 15:04:45,376 INFO L384 CDTParser]: Found 1 translation units. [2023-12-20 15:04:45,377 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label12.c [2023-12-20 15:04:45,391 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b088fe29d/9f319ec08cbc4a53ad5cead6630469e3/FLAG08e9b2704 [2023-12-20 15:04:45,407 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b088fe29d/9f319ec08cbc4a53ad5cead6630469e3 [2023-12-20 15:04:45,411 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-20 15:04:45,412 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-20 15:04:45,414 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-20 15:04:45,414 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-20 15:04:45,420 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-20 15:04:45,420 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.12 03:04:45" (1/1) ... [2023-12-20 15:04:45,421 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14b156d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 03:04:45, skipping insertion in model container [2023-12-20 15:04:45,421 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.12 03:04:45" (1/1) ... [2023-12-20 15:04:45,501 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-20 15:04:45,922 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label12.c[56222,56235] [2023-12-20 15:04:45,962 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-20 15:04:45,973 INFO L202 MainTranslator]: Completed pre-run [2023-12-20 15:04:46,169 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label12.c[56222,56235] [2023-12-20 15:04:46,181 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-20 15:04:46,197 INFO L206 MainTranslator]: Completed translation [2023-12-20 15:04:46,199 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 03:04:46 WrapperNode [2023-12-20 15:04:46,199 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-20 15:04:46,201 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-20 15:04:46,201 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-20 15:04:46,201 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-20 15:04:46,214 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 03:04:46" (1/1) ... [2023-12-20 15:04:46,267 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 03:04:46" (1/1) ... [2023-12-20 15:04:46,347 INFO L138 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1772 [2023-12-20 15:04:46,348 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-20 15:04:46,348 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-20 15:04:46,349 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-20 15:04:46,349 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-20 15:04:46,358 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 03:04:46" (1/1) ... [2023-12-20 15:04:46,358 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 03:04:46" (1/1) ... [2023-12-20 15:04:46,367 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 03:04:46" (1/1) ... [2023-12-20 15:04:46,411 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2023-12-20 15:04:46,411 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 03:04:46" (1/1) ... [2023-12-20 15:04:46,411 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 03:04:46" (1/1) ... [2023-12-20 15:04:46,450 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 03:04:46" (1/1) ... [2023-12-20 15:04:46,469 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 03:04:46" (1/1) ... [2023-12-20 15:04:46,476 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 03:04:46" (1/1) ... [2023-12-20 15:04:46,486 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 03:04:46" (1/1) ... [2023-12-20 15:04:46,499 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-20 15:04:46,500 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-20 15:04:46,500 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-20 15:04:46,501 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-20 15:04:46,502 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 03:04:46" (1/1) ... [2023-12-20 15:04:46,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-20 15:04:46,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 15:04:46,527 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) [2023-12-20 15:04:46,548 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 [2023-12-20 15:04:46,566 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-20 15:04:46,566 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-20 15:04:46,566 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-20 15:04:46,566 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-20 15:04:46,659 INFO L241 CfgBuilder]: Building ICFG [2023-12-20 15:04:46,661 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-20 15:04:48,083 INFO L282 CfgBuilder]: Performing block encoding [2023-12-20 15:04:48,138 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-20 15:04:48,139 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-12-20 15:04:48,139 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.12 03:04:48 BoogieIcfgContainer [2023-12-20 15:04:48,139 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-20 15:04:48,141 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-20 15:04:48,141 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-20 15:04:48,143 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-20 15:04:48,143 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.12 03:04:45" (1/3) ... [2023-12-20 15:04:48,144 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c096668 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.12 03:04:48, skipping insertion in model container [2023-12-20 15:04:48,144 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 03:04:46" (2/3) ... [2023-12-20 15:04:48,144 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c096668 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.12 03:04:48, skipping insertion in model container [2023-12-20 15:04:48,145 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.12 03:04:48" (3/3) ... [2023-12-20 15:04:48,146 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label12.c [2023-12-20 15:04:48,196 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-20 15:04:48,199 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-20 15:04:48,250 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-20 15:04:48,255 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;@36239ae1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-20 15:04:48,256 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-20 15:04:48,262 INFO L276 IsEmpty]: Start isEmpty. Operand has 240 states, 238 states have (on average 1.9201680672268908) internal successors, (457), 239 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:04:48,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2023-12-20 15:04:48,278 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 15:04:48,279 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 15:04:48,280 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 15:04:48,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 15:04:48,288 INFO L85 PathProgramCache]: Analyzing trace with hash -815738572, now seen corresponding path program 1 times [2023-12-20 15:04:48,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 15:04:48,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290975779] [2023-12-20 15:04:48,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 15:04:48,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 15:04:48,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 15:04:48,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 15:04:48,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 15:04:48,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290975779] [2023-12-20 15:04:48,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290975779] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 15:04:48,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 15:04:48,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-20 15:04:48,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658882290] [2023-12-20 15:04:48,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 15:04:48,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-20 15:04:48,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 15:04:48,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-20 15:04:48,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-20 15:04:48,797 INFO L87 Difference]: Start difference. First operand has 240 states, 238 states have (on average 1.9201680672268908) internal successors, (457), 239 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 81.0) internal successors, (162), 2 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:04:48,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 15:04:48,835 INFO L93 Difference]: Finished difference Result 479 states and 913 transitions. [2023-12-20 15:04:48,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-20 15:04:48,838 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 81.0) internal successors, (162), 2 states have internal predecessors, (162), 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 162 [2023-12-20 15:04:48,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 15:04:48,847 INFO L225 Difference]: With dead ends: 479 [2023-12-20 15:04:48,847 INFO L226 Difference]: Without dead ends: 238 [2023-12-20 15:04:48,850 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-20 15:04:48,853 INFO L413 NwaCegarLoop]: 392 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 15:04:48,854 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 392 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 15:04:48,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2023-12-20 15:04:48,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 238. [2023-12-20 15:04:48,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 1.6540084388185654) internal successors, (392), 237 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:04:48,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 392 transitions. [2023-12-20 15:04:48,895 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 392 transitions. Word has length 162 [2023-12-20 15:04:48,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 15:04:48,896 INFO L495 AbstractCegarLoop]: Abstraction has 238 states and 392 transitions. [2023-12-20 15:04:48,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 81.0) internal successors, (162), 2 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:04:48,896 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 392 transitions. [2023-12-20 15:04:48,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2023-12-20 15:04:48,898 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 15:04:48,898 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 15:04:48,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-20 15:04:48,899 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 15:04:48,899 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 15:04:48,900 INFO L85 PathProgramCache]: Analyzing trace with hash 845004421, now seen corresponding path program 1 times [2023-12-20 15:04:48,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 15:04:48,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283090360] [2023-12-20 15:04:48,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 15:04:48,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 15:04:48,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 15:04:49,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 15:04:49,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 15:04:49,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283090360] [2023-12-20 15:04:49,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283090360] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 15:04:49,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 15:04:49,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-20 15:04:49,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912327757] [2023-12-20 15:04:49,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 15:04:49,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-20 15:04:49,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 15:04:49,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-20 15:04:49,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-20 15:04:49,474 INFO L87 Difference]: Start difference. First operand 238 states and 392 transitions. Second operand has 3 states, 3 states have (on average 54.0) internal successors, (162), 2 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:04:50,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 15:04:50,349 INFO L93 Difference]: Finished difference Result 692 states and 1147 transitions. [2023-12-20 15:04:50,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-20 15:04:50,349 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.0) internal successors, (162), 2 states have internal predecessors, (162), 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 162 [2023-12-20 15:04:50,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 15:04:50,353 INFO L225 Difference]: With dead ends: 692 [2023-12-20 15:04:50,353 INFO L226 Difference]: Without dead ends: 455 [2023-12-20 15:04:50,354 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 [2023-12-20 15:04:50,355 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 93 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 605 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 605 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-20 15:04:50,355 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 122 Invalid, 733 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 605 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-12-20 15:04:50,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2023-12-20 15:04:50,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 450. [2023-12-20 15:04:50,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 449 states have (on average 1.5634743875278396) internal successors, (702), 449 states have internal predecessors, (702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:04:50,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 702 transitions. [2023-12-20 15:04:50,372 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 702 transitions. Word has length 162 [2023-12-20 15:04:50,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 15:04:50,373 INFO L495 AbstractCegarLoop]: Abstraction has 450 states and 702 transitions. [2023-12-20 15:04:50,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.0) internal successors, (162), 2 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:04:50,373 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 702 transitions. [2023-12-20 15:04:50,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2023-12-20 15:04:50,376 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 15:04:50,376 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 15:04:50,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-20 15:04:50,377 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 15:04:50,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 15:04:50,377 INFO L85 PathProgramCache]: Analyzing trace with hash -1084307273, now seen corresponding path program 1 times [2023-12-20 15:04:50,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 15:04:50,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991870592] [2023-12-20 15:04:50,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 15:04:50,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 15:04:50,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 15:04:50,700 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 15:04:50,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 15:04:50,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991870592] [2023-12-20 15:04:50,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991870592] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 15:04:50,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 15:04:50,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-20 15:04:50,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854806695] [2023-12-20 15:04:50,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 15:04:50,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-20 15:04:50,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 15:04:50,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-20 15:04:50,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-20 15:04:50,707 INFO L87 Difference]: Start difference. First operand 450 states and 702 transitions. Second operand has 3 states, 3 states have (on average 56.0) internal successors, (168), 2 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:04:51,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 15:04:51,488 INFO L93 Difference]: Finished difference Result 1339 states and 2093 transitions. [2023-12-20 15:04:51,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-20 15:04:51,488 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 2 states have internal predecessors, (168), 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 168 [2023-12-20 15:04:51,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 15:04:51,492 INFO L225 Difference]: With dead ends: 1339 [2023-12-20 15:04:51,492 INFO L226 Difference]: Without dead ends: 890 [2023-12-20 15:04:51,494 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 [2023-12-20 15:04:51,495 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 285 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 704 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 704 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-20 15:04:51,495 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [285 Valid, 152 Invalid, 726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 704 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-12-20 15:04:51,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 890 states. [2023-12-20 15:04:51,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 890 to 886. [2023-12-20 15:04:51,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 886 states, 885 states have (on average 1.5480225988700564) internal successors, (1370), 885 states have internal predecessors, (1370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:04:51,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 886 states to 886 states and 1370 transitions. [2023-12-20 15:04:51,522 INFO L78 Accepts]: Start accepts. Automaton has 886 states and 1370 transitions. Word has length 168 [2023-12-20 15:04:51,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 15:04:51,523 INFO L495 AbstractCegarLoop]: Abstraction has 886 states and 1370 transitions. [2023-12-20 15:04:51,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 2 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:04:51,523 INFO L276 IsEmpty]: Start isEmpty. Operand 886 states and 1370 transitions. [2023-12-20 15:04:51,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2023-12-20 15:04:51,526 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 15:04:51,527 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 15:04:51,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-20 15:04:51,527 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 15:04:51,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 15:04:51,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1137381397, now seen corresponding path program 1 times [2023-12-20 15:04:51,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 15:04:51,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055415553] [2023-12-20 15:04:51,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 15:04:51,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 15:04:51,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 15:04:51,836 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 15:04:51,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 15:04:51,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055415553] [2023-12-20 15:04:51,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055415553] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 15:04:51,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 15:04:51,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-20 15:04:51,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560786186] [2023-12-20 15:04:51,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 15:04:51,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-20 15:04:51,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 15:04:51,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-20 15:04:51,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-20 15:04:51,839 INFO L87 Difference]: Start difference. First operand 886 states and 1370 transitions. Second operand has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 2 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:04:52,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 15:04:52,505 INFO L93 Difference]: Finished difference Result 2611 states and 4041 transitions. [2023-12-20 15:04:52,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-20 15:04:52,506 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 2 states have internal predecessors, (172), 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 172 [2023-12-20 15:04:52,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 15:04:52,512 INFO L225 Difference]: With dead ends: 2611 [2023-12-20 15:04:52,512 INFO L226 Difference]: Without dead ends: 1726 [2023-12-20 15:04:52,514 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 [2023-12-20 15:04:52,522 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 236 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 585 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-20 15:04:52,523 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [236 Valid, 110 Invalid, 762 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 585 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-20 15:04:52,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1726 states. [2023-12-20 15:04:52,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1726 to 1724. [2023-12-20 15:04:52,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1724 states, 1723 states have (on average 1.4730121880441092) internal successors, (2538), 1723 states have internal predecessors, (2538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:04:52,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1724 states to 1724 states and 2538 transitions. [2023-12-20 15:04:52,561 INFO L78 Accepts]: Start accepts. Automaton has 1724 states and 2538 transitions. Word has length 172 [2023-12-20 15:04:52,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 15:04:52,561 INFO L495 AbstractCegarLoop]: Abstraction has 1724 states and 2538 transitions. [2023-12-20 15:04:52,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 2 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:04:52,562 INFO L276 IsEmpty]: Start isEmpty. Operand 1724 states and 2538 transitions. [2023-12-20 15:04:52,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2023-12-20 15:04:52,569 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 15:04:52,569 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 15:04:52,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-20 15:04:52,570 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 15:04:52,570 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 15:04:52,570 INFO L85 PathProgramCache]: Analyzing trace with hash -796084653, now seen corresponding path program 1 times [2023-12-20 15:04:52,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 15:04:52,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963334069] [2023-12-20 15:04:52,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 15:04:52,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 15:04:52,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 15:04:52,767 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-20 15:04:52,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 15:04:52,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963334069] [2023-12-20 15:04:52,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963334069] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 15:04:52,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 15:04:52,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-20 15:04:52,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671758672] [2023-12-20 15:04:52,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 15:04:52,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-20 15:04:52,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 15:04:52,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-20 15:04:52,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-20 15:04:52,769 INFO L87 Difference]: Start difference. First operand 1724 states and 2538 transitions. Second operand has 3 states, 3 states have (on average 57.0) internal successors, (171), 2 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:04:53,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 15:04:53,518 INFO L93 Difference]: Finished difference Result 5072 states and 7472 transitions. [2023-12-20 15:04:53,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-20 15:04:53,519 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.0) internal successors, (171), 2 states have internal predecessors, (171), 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 174 [2023-12-20 15:04:53,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 15:04:53,531 INFO L225 Difference]: With dead ends: 5072 [2023-12-20 15:04:53,531 INFO L226 Difference]: Without dead ends: 3349 [2023-12-20 15:04:53,535 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 [2023-12-20 15:04:53,535 INFO L413 NwaCegarLoop]: 158 mSDtfsCounter, 214 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 569 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 569 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-20 15:04:53,536 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [214 Valid, 192 Invalid, 695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 569 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-20 15:04:53,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3349 states. [2023-12-20 15:04:53,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3349 to 3349. [2023-12-20 15:04:53,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3349 states, 3348 states have (on average 1.3115292712066906) internal successors, (4391), 3348 states have internal predecessors, (4391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:04:53,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3349 states to 3349 states and 4391 transitions. [2023-12-20 15:04:53,594 INFO L78 Accepts]: Start accepts. Automaton has 3349 states and 4391 transitions. Word has length 174 [2023-12-20 15:04:53,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 15:04:53,595 INFO L495 AbstractCegarLoop]: Abstraction has 3349 states and 4391 transitions. [2023-12-20 15:04:53,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.0) internal successors, (171), 2 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:04:53,595 INFO L276 IsEmpty]: Start isEmpty. Operand 3349 states and 4391 transitions. [2023-12-20 15:04:53,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2023-12-20 15:04:53,601 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 15:04:53,602 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 15:04:53,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-20 15:04:53,602 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 15:04:53,602 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 15:04:53,602 INFO L85 PathProgramCache]: Analyzing trace with hash -1190295255, now seen corresponding path program 1 times [2023-12-20 15:04:53,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 15:04:53,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185255195] [2023-12-20 15:04:53,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 15:04:53,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 15:04:53,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 15:04:53,821 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-20 15:04:53,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 15:04:53,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185255195] [2023-12-20 15:04:53,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185255195] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 15:04:53,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 15:04:53,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-20 15:04:53,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585328528] [2023-12-20 15:04:53,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 15:04:53,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-20 15:04:53,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 15:04:53,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-20 15:04:53,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-20 15:04:53,823 INFO L87 Difference]: Start difference. First operand 3349 states and 4391 transitions. Second operand has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 3 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:04:54,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 15:04:54,679 INFO L93 Difference]: Finished difference Result 9359 states and 12380 transitions. [2023-12-20 15:04:54,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-20 15:04:54,680 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 3 states have internal predecessors, (178), 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 183 [2023-12-20 15:04:54,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 15:04:54,702 INFO L225 Difference]: With dead ends: 9359 [2023-12-20 15:04:54,703 INFO L226 Difference]: Without dead ends: 6011 [2023-12-20 15:04:54,709 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-20 15:04:54,710 INFO L413 NwaCegarLoop]: 366 mSDtfsCounter, 216 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 594 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 754 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-20 15:04:54,710 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [216 Valid, 388 Invalid, 754 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 594 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-12-20 15:04:54,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6011 states. [2023-12-20 15:04:54,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6011 to 6005. [2023-12-20 15:04:54,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6005 states, 6004 states have (on average 1.2503331112591605) internal successors, (7507), 6004 states have internal predecessors, (7507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:04:54,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6005 states to 6005 states and 7507 transitions. [2023-12-20 15:04:54,826 INFO L78 Accepts]: Start accepts. Automaton has 6005 states and 7507 transitions. Word has length 183 [2023-12-20 15:04:54,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 15:04:54,826 INFO L495 AbstractCegarLoop]: Abstraction has 6005 states and 7507 transitions. [2023-12-20 15:04:54,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 3 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:04:54,826 INFO L276 IsEmpty]: Start isEmpty. Operand 6005 states and 7507 transitions. [2023-12-20 15:04:54,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2023-12-20 15:04:54,835 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 15:04:54,835 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 15:04:54,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-12-20 15:04:54,835 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 15:04:54,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 15:04:54,836 INFO L85 PathProgramCache]: Analyzing trace with hash -519595219, now seen corresponding path program 1 times [2023-12-20 15:04:54,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 15:04:54,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448927786] [2023-12-20 15:04:54,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 15:04:54,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 15:04:54,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 15:04:55,175 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-12-20 15:04:55,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 15:04:55,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448927786] [2023-12-20 15:04:55,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448927786] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 15:04:55,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 15:04:55,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-20 15:04:55,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213680878] [2023-12-20 15:04:55,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 15:04:55,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-20 15:04:55,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 15:04:55,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-20 15:04:55,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-20 15:04:55,178 INFO L87 Difference]: Start difference. First operand 6005 states and 7507 transitions. Second operand has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 2 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) [2023-12-20 15:04:55,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 15:04:55,999 INFO L93 Difference]: Finished difference Result 17143 states and 21527 transitions. [2023-12-20 15:04:56,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-20 15:04:56,000 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 2 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 202 [2023-12-20 15:04:56,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 15:04:56,034 INFO L225 Difference]: With dead ends: 17143 [2023-12-20 15:04:56,035 INFO L226 Difference]: Without dead ends: 11139 [2023-12-20 15:04:56,044 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 [2023-12-20 15:04:56,045 INFO L413 NwaCegarLoop]: 148 mSDtfsCounter, 219 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 667 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 667 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-20 15:04:56,045 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [219 Valid, 174 Invalid, 758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 667 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-20 15:04:56,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11139 states. [2023-12-20 15:04:56,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11139 to 11124. [2023-12-20 15:04:56,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11124 states, 11123 states have (on average 1.2303335431088736) internal successors, (13685), 11123 states have internal predecessors, (13685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:04:56,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11124 states to 11124 states and 13685 transitions. [2023-12-20 15:04:56,238 INFO L78 Accepts]: Start accepts. Automaton has 11124 states and 13685 transitions. Word has length 202 [2023-12-20 15:04:56,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 15:04:56,239 INFO L495 AbstractCegarLoop]: Abstraction has 11124 states and 13685 transitions. [2023-12-20 15:04:56,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 2 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) [2023-12-20 15:04:56,239 INFO L276 IsEmpty]: Start isEmpty. Operand 11124 states and 13685 transitions. [2023-12-20 15:04:56,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2023-12-20 15:04:56,255 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 15:04:56,256 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 15:04:56,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-12-20 15:04:56,257 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 15:04:56,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 15:04:56,257 INFO L85 PathProgramCache]: Analyzing trace with hash 991816654, now seen corresponding path program 1 times [2023-12-20 15:04:56,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 15:04:56,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408208063] [2023-12-20 15:04:56,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 15:04:56,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 15:04:56,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 15:04:56,534 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 38 proven. 6 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-12-20 15:04:56,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 15:04:56,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408208063] [2023-12-20 15:04:56,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408208063] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 15:04:56,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369313746] [2023-12-20 15:04:56,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 15:04:56,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 15:04:56,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 15:04:56,540 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) [2023-12-20 15:04:56,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-20 15:04:56,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 15:04:56,713 INFO L262 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-20 15:04:56,726 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 15:04:56,780 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-12-20 15:04:56,780 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-20 15:04:56,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369313746] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 15:04:56,781 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-20 15:04:56,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2023-12-20 15:04:56,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940528238] [2023-12-20 15:04:56,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 15:04:56,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-20 15:04:56,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 15:04:56,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-20 15:04:56,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-20 15:04:56,782 INFO L87 Difference]: Start difference. First operand 11124 states and 13685 transitions. Second operand has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 2 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:04:57,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 15:04:57,620 INFO L93 Difference]: Finished difference Result 30610 states and 37845 transitions. [2023-12-20 15:04:57,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-20 15:04:57,621 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 2 states have internal predecessors, (178), 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 210 [2023-12-20 15:04:57,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 15:04:57,666 INFO L225 Difference]: With dead ends: 30610 [2023-12-20 15:04:57,666 INFO L226 Difference]: Without dead ends: 19487 [2023-12-20 15:04:57,684 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-20 15:04:57,685 INFO L413 NwaCegarLoop]: 157 mSDtfsCounter, 241 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 626 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-20 15:04:57,685 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [241 Valid, 192 Invalid, 719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 626 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-20 15:04:57,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19487 states. [2023-12-20 15:04:57,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19487 to 19480. [2023-12-20 15:04:57,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19480 states, 19479 states have (on average 1.2104317470096) internal successors, (23578), 19479 states have internal predecessors, (23578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:04:58,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19480 states to 19480 states and 23578 transitions. [2023-12-20 15:04:58,003 INFO L78 Accepts]: Start accepts. Automaton has 19480 states and 23578 transitions. Word has length 210 [2023-12-20 15:04:58,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 15:04:58,004 INFO L495 AbstractCegarLoop]: Abstraction has 19480 states and 23578 transitions. [2023-12-20 15:04:58,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 2 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:04:58,005 INFO L276 IsEmpty]: Start isEmpty. Operand 19480 states and 23578 transitions. [2023-12-20 15:04:58,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2023-12-20 15:04:58,024 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 15:04:58,024 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 15:04:58,044 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-20 15:04:58,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 15:04:58,234 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 15:04:58,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 15:04:58,234 INFO L85 PathProgramCache]: Analyzing trace with hash 1600456713, now seen corresponding path program 1 times [2023-12-20 15:04:58,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 15:04:58,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836110928] [2023-12-20 15:04:58,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 15:04:58,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 15:04:58,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 15:04:58,590 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 56 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-12-20 15:04:58,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 15:04:58,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836110928] [2023-12-20 15:04:58,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836110928] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 15:04:58,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249818157] [2023-12-20 15:04:58,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 15:04:58,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 15:04:58,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 15:04:58,593 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) [2023-12-20 15:04:58,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-20 15:04:58,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 15:04:58,795 INFO L262 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-20 15:04:58,800 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 15:04:59,015 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-12-20 15:04:59,015 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-20 15:04:59,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249818157] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 15:04:59,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-20 15:04:59,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-12-20 15:04:59,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863898616] [2023-12-20 15:04:59,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 15:04:59,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-20 15:04:59,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 15:04:59,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-20 15:04:59,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-20 15:04:59,018 INFO L87 Difference]: Start difference. First operand 19480 states and 23578 transitions. Second operand has 3 states, 3 states have (on average 65.33333333333333) internal successors, (196), 3 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:04:59,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 15:04:59,879 INFO L93 Difference]: Finished difference Result 44098 states and 53948 transitions. [2023-12-20 15:04:59,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-20 15:04:59,879 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 65.33333333333333) internal successors, (196), 3 states have internal predecessors, (196), 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 213 [2023-12-20 15:04:59,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 15:04:59,926 INFO L225 Difference]: With dead ends: 44098 [2023-12-20 15:04:59,926 INFO L226 Difference]: Without dead ends: 24822 [2023-12-20 15:04:59,947 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-20 15:04:59,948 INFO L413 NwaCegarLoop]: 375 mSDtfsCounter, 75 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 701 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 397 SdHoareTripleChecker+Invalid, 772 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-20 15:04:59,948 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 397 Invalid, 772 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 701 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-20 15:04:59,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24822 states. [2023-12-20 15:05:00,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24822 to 24770. [2023-12-20 15:05:00,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24770 states, 24769 states have (on average 1.2177318422221326) internal successors, (30162), 24769 states have internal predecessors, (30162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:05:00,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24770 states to 24770 states and 30162 transitions. [2023-12-20 15:05:00,414 INFO L78 Accepts]: Start accepts. Automaton has 24770 states and 30162 transitions. Word has length 213 [2023-12-20 15:05:00,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 15:05:00,415 INFO L495 AbstractCegarLoop]: Abstraction has 24770 states and 30162 transitions. [2023-12-20 15:05:00,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.33333333333333) internal successors, (196), 3 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:05:00,415 INFO L276 IsEmpty]: Start isEmpty. Operand 24770 states and 30162 transitions. [2023-12-20 15:05:00,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2023-12-20 15:05:00,442 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 15:05:00,442 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 15:05:00,451 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-20 15:05:00,648 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,SelfDestructingSolverStorable8 [2023-12-20 15:05:00,649 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 15:05:00,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 15:05:00,649 INFO L85 PathProgramCache]: Analyzing trace with hash -699872706, now seen corresponding path program 1 times [2023-12-20 15:05:00,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 15:05:00,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885201605] [2023-12-20 15:05:00,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 15:05:00,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 15:05:00,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 15:05:01,011 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-12-20 15:05:01,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 15:05:01,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885201605] [2023-12-20 15:05:01,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885201605] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 15:05:01,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 15:05:01,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-20 15:05:01,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074767880] [2023-12-20 15:05:01,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 15:05:01,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-20 15:05:01,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 15:05:01,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-20 15:05:01,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-20 15:05:01,013 INFO L87 Difference]: Start difference. First operand 24770 states and 30162 transitions. Second operand has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 2 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:05:02,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 15:05:02,007 INFO L93 Difference]: Finished difference Result 56319 states and 69207 transitions. [2023-12-20 15:05:02,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-20 15:05:02,008 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 2 states have internal predecessors, (193), 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 220 [2023-12-20 15:05:02,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 15:05:02,064 INFO L225 Difference]: With dead ends: 56319 [2023-12-20 15:05:02,064 INFO L226 Difference]: Without dead ends: 31956 [2023-12-20 15:05:02,087 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 [2023-12-20 15:05:02,088 INFO L413 NwaCegarLoop]: 206 mSDtfsCounter, 211 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 785 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 785 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-20 15:05:02,088 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 234 Invalid, 800 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 785 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-12-20 15:05:02,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31956 states. [2023-12-20 15:05:02,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31956 to 31904. [2023-12-20 15:05:02,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31904 states, 31903 states have (on average 1.231514277654139) internal successors, (39289), 31903 states have internal predecessors, (39289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:05:02,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31904 states to 31904 states and 39289 transitions. [2023-12-20 15:05:02,605 INFO L78 Accepts]: Start accepts. Automaton has 31904 states and 39289 transitions. Word has length 220 [2023-12-20 15:05:02,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 15:05:02,606 INFO L495 AbstractCegarLoop]: Abstraction has 31904 states and 39289 transitions. [2023-12-20 15:05:02,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 2 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:05:02,606 INFO L276 IsEmpty]: Start isEmpty. Operand 31904 states and 39289 transitions. [2023-12-20 15:05:02,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2023-12-20 15:05:02,660 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 15:05:02,660 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 15:05:02,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-12-20 15:05:02,660 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 15:05:02,661 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 15:05:02,661 INFO L85 PathProgramCache]: Analyzing trace with hash -405167399, now seen corresponding path program 1 times [2023-12-20 15:05:02,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 15:05:02,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323049208] [2023-12-20 15:05:02,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 15:05:02,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 15:05:02,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 15:05:03,077 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 82 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-20 15:05:03,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 15:05:03,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323049208] [2023-12-20 15:05:03,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323049208] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 15:05:03,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 15:05:03,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-20 15:05:03,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456463438] [2023-12-20 15:05:03,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 15:05:03,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-20 15:05:03,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 15:05:03,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-20 15:05:03,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-20 15:05:03,080 INFO L87 Difference]: Start difference. First operand 31904 states and 39289 transitions. Second operand has 3 states, 3 states have (on average 75.33333333333333) internal successors, (226), 3 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:05:03,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 15:05:03,961 INFO L93 Difference]: Finished difference Result 72174 states and 89487 transitions. [2023-12-20 15:05:03,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-20 15:05:03,962 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 75.33333333333333) internal successors, (226), 3 states have internal predecessors, (226), 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 231 [2023-12-20 15:05:03,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 15:05:04,023 INFO L225 Difference]: With dead ends: 72174 [2023-12-20 15:05:04,023 INFO L226 Difference]: Without dead ends: 40881 [2023-12-20 15:05:04,058 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-20 15:05:04,059 INFO L413 NwaCegarLoop]: 363 mSDtfsCounter, 173 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 567 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 743 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-20 15:05:04,059 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 383 Invalid, 743 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 567 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-20 15:05:04,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40881 states. [2023-12-20 15:05:04,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40881 to 40632. [2023-12-20 15:05:04,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40632 states, 40631 states have (on average 1.2076247200413477) internal successors, (49067), 40631 states have internal predecessors, (49067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:05:04,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40632 states to 40632 states and 49067 transitions. [2023-12-20 15:05:04,719 INFO L78 Accepts]: Start accepts. Automaton has 40632 states and 49067 transitions. Word has length 231 [2023-12-20 15:05:04,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 15:05:04,719 INFO L495 AbstractCegarLoop]: Abstraction has 40632 states and 49067 transitions. [2023-12-20 15:05:04,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.33333333333333) internal successors, (226), 3 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:05:04,719 INFO L276 IsEmpty]: Start isEmpty. Operand 40632 states and 49067 transitions. [2023-12-20 15:05:04,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2023-12-20 15:05:04,771 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 15:05:04,771 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 15:05:04,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-12-20 15:05:04,772 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 15:05:04,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 15:05:04,772 INFO L85 PathProgramCache]: Analyzing trace with hash 563497016, now seen corresponding path program 1 times [2023-12-20 15:05:04,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 15:05:04,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628614196] [2023-12-20 15:05:04,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 15:05:04,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 15:05:04,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 15:05:05,111 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-20 15:05:05,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 15:05:05,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628614196] [2023-12-20 15:05:05,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628614196] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 15:05:05,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 15:05:05,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-20 15:05:05,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784406713] [2023-12-20 15:05:05,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 15:05:05,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-20 15:05:05,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 15:05:05,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-20 15:05:05,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-20 15:05:05,114 INFO L87 Difference]: Start difference. First operand 40632 states and 49067 transitions. Second operand has 3 states, 3 states have (on average 79.33333333333333) internal successors, (238), 2 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:05:06,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 15:05:06,002 INFO L93 Difference]: Finished difference Result 95972 states and 116384 transitions. [2023-12-20 15:05:06,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-20 15:05:06,003 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 79.33333333333333) internal successors, (238), 2 states have internal predecessors, (238), 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 243 [2023-12-20 15:05:06,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 15:05:06,078 INFO L225 Difference]: With dead ends: 95972 [2023-12-20 15:05:06,078 INFO L226 Difference]: Without dead ends: 55951 [2023-12-20 15:05:06,114 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 [2023-12-20 15:05:06,115 INFO L413 NwaCegarLoop]: 208 mSDtfsCounter, 171 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 773 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 773 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-20 15:05:06,115 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 239 Invalid, 787 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 773 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-20 15:05:06,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55951 states. [2023-12-20 15:05:06,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55951 to 55896. [2023-12-20 15:05:06,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55896 states, 55895 states have (on average 1.2127560604705252) internal successors, (67787), 55895 states have internal predecessors, (67787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:05:07,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55896 states to 55896 states and 67787 transitions. [2023-12-20 15:05:07,039 INFO L78 Accepts]: Start accepts. Automaton has 55896 states and 67787 transitions. Word has length 243 [2023-12-20 15:05:07,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 15:05:07,039 INFO L495 AbstractCegarLoop]: Abstraction has 55896 states and 67787 transitions. [2023-12-20 15:05:07,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 79.33333333333333) internal successors, (238), 2 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:05:07,039 INFO L276 IsEmpty]: Start isEmpty. Operand 55896 states and 67787 transitions. [2023-12-20 15:05:07,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2023-12-20 15:05:07,075 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 15:05:07,076 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 15:05:07,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-12-20 15:05:07,076 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 15:05:07,077 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 15:05:07,077 INFO L85 PathProgramCache]: Analyzing trace with hash -1349318145, now seen corresponding path program 1 times [2023-12-20 15:05:07,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 15:05:07,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741644644] [2023-12-20 15:05:07,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 15:05:07,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 15:05:07,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 15:05:07,574 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 101 proven. 6 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2023-12-20 15:05:07,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 15:05:07,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741644644] [2023-12-20 15:05:07,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741644644] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 15:05:07,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060792791] [2023-12-20 15:05:07,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 15:05:07,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 15:05:07,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 15:05:07,576 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) [2023-12-20 15:05:07,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-20 15:05:07,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 15:05:07,761 INFO L262 TraceCheckSpWp]: Trace formula consists of 554 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-20 15:05:07,774 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 15:05:07,810 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 148 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-12-20 15:05:07,810 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-20 15:05:07,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060792791] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 15:05:07,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-20 15:05:07,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-12-20 15:05:07,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084095769] [2023-12-20 15:05:07,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 15:05:07,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-20 15:05:07,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 15:05:07,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-20 15:05:07,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-20 15:05:07,813 INFO L87 Difference]: Start difference. First operand 55896 states and 67787 transitions. Second operand has 3 states, 3 states have (on average 75.0) internal successors, (225), 3 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:05:08,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 15:05:08,438 INFO L93 Difference]: Finished difference Result 148245 states and 179594 transitions. [2023-12-20 15:05:08,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-20 15:05:08,439 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 75.0) internal successors, (225), 3 states have internal predecessors, (225), 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 247 [2023-12-20 15:05:08,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 15:05:08,542 INFO L225 Difference]: With dead ends: 148245 [2023-12-20 15:05:08,542 INFO L226 Difference]: Without dead ends: 93367 [2023-12-20 15:05:08,578 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 246 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-20 15:05:08,578 INFO L413 NwaCegarLoop]: 626 mSDtfsCounter, 303 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 895 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-20 15:05:08,578 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [303 Valid, 895 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-20 15:05:08,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93367 states. [2023-12-20 15:05:09,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93367 to 93365. [2023-12-20 15:05:09,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93365 states, 93364 states have (on average 1.1911550490553104) internal successors, (111211), 93364 states have internal predecessors, (111211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:05:09,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93365 states to 93365 states and 111211 transitions. [2023-12-20 15:05:09,835 INFO L78 Accepts]: Start accepts. Automaton has 93365 states and 111211 transitions. Word has length 247 [2023-12-20 15:05:09,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 15:05:09,836 INFO L495 AbstractCegarLoop]: Abstraction has 93365 states and 111211 transitions. [2023-12-20 15:05:09,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.0) internal successors, (225), 3 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:05:09,836 INFO L276 IsEmpty]: Start isEmpty. Operand 93365 states and 111211 transitions. [2023-12-20 15:05:09,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2023-12-20 15:05:09,911 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 15:05:09,911 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 15:05:09,932 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-20 15:05:10,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 15:05:10,116 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 15:05:10,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 15:05:10,117 INFO L85 PathProgramCache]: Analyzing trace with hash 211945586, now seen corresponding path program 1 times [2023-12-20 15:05:10,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 15:05:10,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389586548] [2023-12-20 15:05:10,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 15:05:10,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 15:05:10,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 15:05:10,637 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 93 proven. 6 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-12-20 15:05:10,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 15:05:10,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389586548] [2023-12-20 15:05:10,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389586548] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 15:05:10,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46132097] [2023-12-20 15:05:10,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 15:05:10,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 15:05:10,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 15:05:10,639 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) [2023-12-20 15:05:10,643 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-20 15:05:10,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 15:05:10,893 INFO L262 TraceCheckSpWp]: Trace formula consists of 515 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-20 15:05:10,896 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 15:05:10,952 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 100 proven. 0 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2023-12-20 15:05:10,952 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-20 15:05:10,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46132097] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 15:05:10,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-20 15:05:10,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2023-12-20 15:05:10,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723265941] [2023-12-20 15:05:10,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 15:05:10,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-20 15:05:10,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 15:05:10,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-20 15:05:10,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-20 15:05:10,954 INFO L87 Difference]: Start difference. First operand 93365 states and 111211 transitions. Second operand has 3 states, 3 states have (on average 65.66666666666667) internal successors, (197), 2 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:05:11,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 15:05:11,822 INFO L93 Difference]: Finished difference Result 181330 states and 216156 transitions. [2023-12-20 15:05:11,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-20 15:05:11,823 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 65.66666666666667) internal successors, (197), 2 states have internal predecessors, (197), 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 247 [2023-12-20 15:05:11,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 15:05:11,951 INFO L225 Difference]: With dead ends: 181330 [2023-12-20 15:05:11,951 INFO L226 Difference]: Without dead ends: 88983 [2023-12-20 15:05:12,000 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 246 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-20 15:05:12,001 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 308 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-20 15:05:12,001 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [308 Valid, 29 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 324 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-20 15:05:12,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88983 states. [2023-12-20 15:05:13,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88983 to 88983. [2023-12-20 15:05:13,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88983 states, 88982 states have (on average 1.181328808073543) internal successors, (105117), 88982 states have internal predecessors, (105117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:05:13,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88983 states to 88983 states and 105117 transitions. [2023-12-20 15:05:13,251 INFO L78 Accepts]: Start accepts. Automaton has 88983 states and 105117 transitions. Word has length 247 [2023-12-20 15:05:13,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 15:05:13,251 INFO L495 AbstractCegarLoop]: Abstraction has 88983 states and 105117 transitions. [2023-12-20 15:05:13,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.66666666666667) internal successors, (197), 2 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:05:13,251 INFO L276 IsEmpty]: Start isEmpty. Operand 88983 states and 105117 transitions. [2023-12-20 15:05:13,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2023-12-20 15:05:13,293 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 15:05:13,293 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 15:05:13,302 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-20 15:05:13,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 15:05:13,500 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 15:05:13,500 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 15:05:13,500 INFO L85 PathProgramCache]: Analyzing trace with hash 1495596276, now seen corresponding path program 1 times [2023-12-20 15:05:13,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 15:05:13,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045394922] [2023-12-20 15:05:13,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 15:05:13,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 15:05:13,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 15:05:13,897 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 114 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 15:05:13,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 15:05:13,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045394922] [2023-12-20 15:05:13,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045394922] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 15:05:13,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 15:05:13,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-20 15:05:13,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992953378] [2023-12-20 15:05:13,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 15:05:13,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-20 15:05:13,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 15:05:13,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-20 15:05:13,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-20 15:05:13,899 INFO L87 Difference]: Start difference. First operand 88983 states and 105117 transitions. Second operand has 4 states, 4 states have (on average 61.75) internal successors, (247), 3 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:05:15,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 15:05:15,274 INFO L93 Difference]: Finished difference Result 175352 states and 207031 transitions. [2023-12-20 15:05:15,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-20 15:05:15,276 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 61.75) internal successors, (247), 3 states have internal predecessors, (247), 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 247 [2023-12-20 15:05:15,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 15:05:15,366 INFO L225 Difference]: With dead ends: 175352 [2023-12-20 15:05:15,366 INFO L226 Difference]: Without dead ends: 87387 [2023-12-20 15:05:15,414 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-20 15:05:15,414 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 356 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 1064 mSolverCounterSat, 198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 1262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 198 IncrementalHoareTripleChecker+Valid, 1064 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-12-20 15:05:15,415 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [356 Valid, 109 Invalid, 1262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [198 Valid, 1064 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-12-20 15:05:15,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87387 states. [2023-12-20 15:05:16,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87387 to 84079. [2023-12-20 15:05:16,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84079 states, 84078 states have (on average 1.1726848878422418) internal successors, (98597), 84078 states have internal predecessors, (98597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:05:16,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84079 states to 84079 states and 98597 transitions. [2023-12-20 15:05:16,498 INFO L78 Accepts]: Start accepts. Automaton has 84079 states and 98597 transitions. Word has length 247 [2023-12-20 15:05:16,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 15:05:16,498 INFO L495 AbstractCegarLoop]: Abstraction has 84079 states and 98597 transitions. [2023-12-20 15:05:16,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 61.75) internal successors, (247), 3 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:05:16,498 INFO L276 IsEmpty]: Start isEmpty. Operand 84079 states and 98597 transitions. [2023-12-20 15:05:16,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2023-12-20 15:05:16,784 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 15:05:16,788 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 15:05:16,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-12-20 15:05:16,788 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 15:05:16,789 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 15:05:16,789 INFO L85 PathProgramCache]: Analyzing trace with hash -461127005, now seen corresponding path program 1 times [2023-12-20 15:05:16,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 15:05:16,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463121873] [2023-12-20 15:05:16,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 15:05:16,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 15:05:16,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 15:05:17,042 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 74 proven. 6 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2023-12-20 15:05:17,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 15:05:17,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463121873] [2023-12-20 15:05:17,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463121873] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 15:05:17,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927176530] [2023-12-20 15:05:17,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 15:05:17,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 15:05:17,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 15:05:17,048 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) [2023-12-20 15:05:17,050 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-20 15:05:17,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 15:05:17,358 INFO L262 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-20 15:05:17,362 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 15:05:17,480 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 80 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2023-12-20 15:05:17,480 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-20 15:05:17,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927176530] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 15:05:17,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-20 15:05:17,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-12-20 15:05:17,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131904196] [2023-12-20 15:05:17,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 15:05:17,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-20 15:05:17,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 15:05:17,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-20 15:05:17,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-12-20 15:05:17,482 INFO L87 Difference]: Start difference. First operand 84079 states and 98597 transitions. Second operand has 4 states, 4 states have (on average 50.25) internal successors, (201), 3 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:05:18,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 15:05:18,947 INFO L93 Difference]: Finished difference Result 217862 states and 255314 transitions. [2023-12-20 15:05:18,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-20 15:05:18,948 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 50.25) internal successors, (201), 3 states have internal predecessors, (201), 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 254 [2023-12-20 15:05:18,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 15:05:19,104 INFO L225 Difference]: With dead ends: 217862 [2023-12-20 15:05:19,104 INFO L226 Difference]: Without dead ends: 134801 [2023-12-20 15:05:19,158 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-12-20 15:05:19,159 INFO L413 NwaCegarLoop]: 245 mSDtfsCounter, 497 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 875 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 497 SdHoareTripleChecker+Valid, 484 SdHoareTripleChecker+Invalid, 966 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 875 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-20 15:05:19,159 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [497 Valid, 484 Invalid, 966 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 875 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-12-20 15:05:19,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134801 states. [2023-12-20 15:05:20,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134801 to 134763. [2023-12-20 15:05:20,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134763 states, 134762 states have (on average 1.1684970540656863) internal successors, (157469), 134762 states have internal predecessors, (157469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:05:20,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134763 states to 134763 states and 157469 transitions. [2023-12-20 15:05:20,933 INFO L78 Accepts]: Start accepts. Automaton has 134763 states and 157469 transitions. Word has length 254 [2023-12-20 15:05:20,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 15:05:20,934 INFO L495 AbstractCegarLoop]: Abstraction has 134763 states and 157469 transitions. [2023-12-20 15:05:20,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 50.25) internal successors, (201), 3 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:05:20,934 INFO L276 IsEmpty]: Start isEmpty. Operand 134763 states and 157469 transitions. [2023-12-20 15:05:21,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2023-12-20 15:05:21,238 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 15:05:21,239 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 15:05:21,248 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-12-20 15:05:21,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-12-20 15:05:21,447 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 15:05:21,447 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 15:05:21,447 INFO L85 PathProgramCache]: Analyzing trace with hash -134085159, now seen corresponding path program 1 times [2023-12-20 15:05:21,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 15:05:21,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088662983] [2023-12-20 15:05:21,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 15:05:21,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 15:05:21,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 15:05:21,636 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 102 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-12-20 15:05:21,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 15:05:21,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088662983] [2023-12-20 15:05:21,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088662983] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 15:05:21,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 15:05:21,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-20 15:05:21,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157885461] [2023-12-20 15:05:21,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 15:05:21,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-20 15:05:21,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 15:05:21,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-20 15:05:21,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-20 15:05:21,638 INFO L87 Difference]: Start difference. First operand 134763 states and 157469 transitions. Second operand has 4 states, 4 states have (on average 51.25) internal successors, (205), 3 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:05:23,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 15:05:23,352 INFO L93 Difference]: Finished difference Result 273207 states and 320733 transitions. [2023-12-20 15:05:23,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-20 15:05:23,364 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 51.25) internal successors, (205), 3 states have internal predecessors, (205), 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 258 [2023-12-20 15:05:23,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 15:05:23,599 INFO L225 Difference]: With dead ends: 273207 [2023-12-20 15:05:23,599 INFO L226 Difference]: Without dead ends: 139462 [2023-12-20 15:05:23,667 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-20 15:05:23,668 INFO L413 NwaCegarLoop]: 223 mSDtfsCounter, 561 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 733 mSolverCounterSat, 219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 561 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 952 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 733 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-20 15:05:23,668 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [561 Valid, 465 Invalid, 952 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 733 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-20 15:05:23,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139462 states. [2023-12-20 15:05:25,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139462 to 136608. [2023-12-20 15:05:25,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136608 states, 136607 states have (on average 1.1701010929161757) internal successors, (159844), 136607 states have internal predecessors, (159844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:05:25,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136608 states to 136608 states and 159844 transitions. [2023-12-20 15:05:25,675 INFO L78 Accepts]: Start accepts. Automaton has 136608 states and 159844 transitions. Word has length 258 [2023-12-20 15:05:25,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 15:05:25,675 INFO L495 AbstractCegarLoop]: Abstraction has 136608 states and 159844 transitions. [2023-12-20 15:05:25,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 51.25) internal successors, (205), 3 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:05:25,675 INFO L276 IsEmpty]: Start isEmpty. Operand 136608 states and 159844 transitions. [2023-12-20 15:05:25,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2023-12-20 15:05:25,708 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 15:05:25,709 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 15:05:25,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-12-20 15:05:25,709 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 15:05:25,709 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 15:05:25,709 INFO L85 PathProgramCache]: Analyzing trace with hash -508818237, now seen corresponding path program 1 times [2023-12-20 15:05:25,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 15:05:25,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317122988] [2023-12-20 15:05:25,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 15:05:25,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 15:05:25,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 15:05:26,150 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 94 proven. 0 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2023-12-20 15:05:26,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 15:05:26,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317122988] [2023-12-20 15:05:26,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317122988] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 15:05:26,150 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 15:05:26,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-20 15:05:26,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814739763] [2023-12-20 15:05:26,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 15:05:26,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-20 15:05:26,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 15:05:26,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-20 15:05:26,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-20 15:05:26,152 INFO L87 Difference]: Start difference. First operand 136608 states and 159844 transitions. Second operand has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 2 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:05:27,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 15:05:27,581 INFO L93 Difference]: Finished difference Result 312338 states and 367014 transitions. [2023-12-20 15:05:27,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-20 15:05:27,582 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 2 states have internal predecessors, (199), 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 260 [2023-12-20 15:05:27,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 15:05:27,813 INFO L225 Difference]: With dead ends: 312338 [2023-12-20 15:05:27,813 INFO L226 Difference]: Without dead ends: 177158 [2023-12-20 15:05:27,871 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 [2023-12-20 15:05:27,872 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 226 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 691 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 691 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-20 15:05:27,872 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [226 Valid, 144 Invalid, 711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 691 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-20 15:05:28,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177158 states. [2023-12-20 15:05:29,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177158 to 177148. [2023-12-20 15:05:30,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177148 states, 177147 states have (on average 1.175001552383049) internal successors, (208148), 177147 states have internal predecessors, (208148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:05:30,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177148 states to 177148 states and 208148 transitions. [2023-12-20 15:05:30,313 INFO L78 Accepts]: Start accepts. Automaton has 177148 states and 208148 transitions. Word has length 260 [2023-12-20 15:05:30,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 15:05:30,313 INFO L495 AbstractCegarLoop]: Abstraction has 177148 states and 208148 transitions. [2023-12-20 15:05:30,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 2 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:05:30,314 INFO L276 IsEmpty]: Start isEmpty. Operand 177148 states and 208148 transitions. [2023-12-20 15:05:30,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2023-12-20 15:05:30,355 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 15:05:30,355 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 15:05:30,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-12-20 15:05:30,355 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 15:05:30,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 15:05:30,355 INFO L85 PathProgramCache]: Analyzing trace with hash -922652869, now seen corresponding path program 1 times [2023-12-20 15:05:30,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 15:05:30,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736472714] [2023-12-20 15:05:30,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 15:05:30,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 15:05:30,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 15:05:30,863 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 145 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-12-20 15:05:30,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 15:05:30,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736472714] [2023-12-20 15:05:30,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736472714] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 15:05:30,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 15:05:30,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-20 15:05:30,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311231570] [2023-12-20 15:05:30,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 15:05:30,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-20 15:05:30,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 15:05:30,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-20 15:05:30,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-20 15:05:30,869 INFO L87 Difference]: Start difference. First operand 177148 states and 208148 transitions. Second operand has 3 states, 3 states have (on average 76.0) internal successors, (228), 3 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:05:32,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 15:05:32,416 INFO L93 Difference]: Finished difference Result 348861 states and 412497 transitions. [2023-12-20 15:05:32,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-20 15:05:32,416 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 76.0) internal successors, (228), 3 states have internal predecessors, (228), 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 266 [2023-12-20 15:05:32,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 15:05:32,611 INFO L225 Difference]: With dead ends: 348861 [2023-12-20 15:05:32,612 INFO L226 Difference]: Without dead ends: 159947 [2023-12-20 15:05:32,992 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-20 15:05:32,993 INFO L413 NwaCegarLoop]: 347 mSDtfsCounter, 167 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 661 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-20 15:05:32,993 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [167 Valid, 367 Invalid, 661 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 496 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-20 15:05:33,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159947 states. [2023-12-20 15:05:34,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159947 to 134150. [2023-12-20 15:05:34,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134150 states, 134149 states have (on average 1.1095274657284064) internal successors, (148842), 134149 states have internal predecessors, (148842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:05:35,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134150 states to 134150 states and 148842 transitions. [2023-12-20 15:05:35,069 INFO L78 Accepts]: Start accepts. Automaton has 134150 states and 148842 transitions. Word has length 266 [2023-12-20 15:05:35,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 15:05:35,070 INFO L495 AbstractCegarLoop]: Abstraction has 134150 states and 148842 transitions. [2023-12-20 15:05:35,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 76.0) internal successors, (228), 3 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:05:35,070 INFO L276 IsEmpty]: Start isEmpty. Operand 134150 states and 148842 transitions. [2023-12-20 15:05:35,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2023-12-20 15:05:35,100 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 15:05:35,100 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 15:05:35,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-12-20 15:05:35,100 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 15:05:35,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 15:05:35,101 INFO L85 PathProgramCache]: Analyzing trace with hash -1387856654, now seen corresponding path program 1 times [2023-12-20 15:05:35,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 15:05:35,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310000237] [2023-12-20 15:05:35,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 15:05:35,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 15:05:35,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 15:05:35,224 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 107 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2023-12-20 15:05:35,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 15:05:35,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310000237] [2023-12-20 15:05:35,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310000237] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 15:05:35,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 15:05:35,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-20 15:05:35,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915221876] [2023-12-20 15:05:35,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 15:05:35,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-20 15:05:35,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 15:05:35,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-20 15:05:35,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-20 15:05:35,230 INFO L87 Difference]: Start difference. First operand 134150 states and 148842 transitions. Second operand has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:05:36,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 15:05:36,496 INFO L93 Difference]: Finished difference Result 288958 states and 320346 transitions. [2023-12-20 15:05:36,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-20 15:05:36,497 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 states have internal predecessors, (212), 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 287 [2023-12-20 15:05:36,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 15:05:36,997 INFO L225 Difference]: With dead ends: 288958 [2023-12-20 15:05:36,998 INFO L226 Difference]: Without dead ends: 159700 [2023-12-20 15:05:37,064 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-20 15:05:37,066 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 201 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 543 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 543 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-20 15:05:37,066 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [201 Valid, 85 Invalid, 602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 543 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-20 15:05:37,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159700 states. [2023-12-20 15:05:38,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159700 to 130816. [2023-12-20 15:05:38,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130816 states, 130815 states have (on average 1.0943469785575048) internal successors, (143157), 130815 states have internal predecessors, (143157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:05:39,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130816 states to 130816 states and 143157 transitions. [2023-12-20 15:05:39,152 INFO L78 Accepts]: Start accepts. Automaton has 130816 states and 143157 transitions. Word has length 287 [2023-12-20 15:05:39,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 15:05:39,152 INFO L495 AbstractCegarLoop]: Abstraction has 130816 states and 143157 transitions. [2023-12-20 15:05:39,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:05:39,152 INFO L276 IsEmpty]: Start isEmpty. Operand 130816 states and 143157 transitions. [2023-12-20 15:05:39,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 313 [2023-12-20 15:05:39,192 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 15:05:39,192 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 15:05:39,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-12-20 15:05:39,193 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 15:05:39,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 15:05:39,193 INFO L85 PathProgramCache]: Analyzing trace with hash 213488626, now seen corresponding path program 1 times [2023-12-20 15:05:39,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 15:05:39,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917997213] [2023-12-20 15:05:39,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 15:05:39,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 15:05:39,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 15:05:39,790 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 202 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 15:05:39,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 15:05:39,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917997213] [2023-12-20 15:05:39,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917997213] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 15:05:39,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 15:05:39,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-20 15:05:39,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133421259] [2023-12-20 15:05:39,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 15:05:39,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-20 15:05:39,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 15:05:39,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-20 15:05:39,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-20 15:05:39,792 INFO L87 Difference]: Start difference. First operand 130816 states and 143157 transitions. Second operand has 4 states, 4 states have (on average 78.0) internal successors, (312), 3 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:05:41,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 15:05:41,420 INFO L93 Difference]: Finished difference Result 308779 states and 338203 transitions. [2023-12-20 15:05:41,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-20 15:05:41,420 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 78.0) internal successors, (312), 3 states have internal predecessors, (312), 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 312 [2023-12-20 15:05:41,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 15:05:41,896 INFO L225 Difference]: With dead ends: 308779 [2023-12-20 15:05:41,896 INFO L226 Difference]: Without dead ends: 184890 [2023-12-20 15:05:41,922 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-20 15:05:41,924 INFO L413 NwaCegarLoop]: 206 mSDtfsCounter, 404 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 655 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 404 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 842 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 655 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-20 15:05:41,924 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [404 Valid, 402 Invalid, 842 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 655 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-12-20 15:05:42,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184890 states. [2023-12-20 15:05:43,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184890 to 179989. [2023-12-20 15:05:43,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179989 states, 179988 states have (on average 1.087039135942396) internal successors, (195654), 179988 states have internal predecessors, (195654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:05:44,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179989 states to 179989 states and 195654 transitions. [2023-12-20 15:05:44,454 INFO L78 Accepts]: Start accepts. Automaton has 179989 states and 195654 transitions. Word has length 312 [2023-12-20 15:05:44,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 15:05:44,454 INFO L495 AbstractCegarLoop]: Abstraction has 179989 states and 195654 transitions. [2023-12-20 15:05:44,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 78.0) internal successors, (312), 3 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:05:44,454 INFO L276 IsEmpty]: Start isEmpty. Operand 179989 states and 195654 transitions. [2023-12-20 15:05:44,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2023-12-20 15:05:44,485 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 15:05:44,485 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 15:05:44,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-12-20 15:05:44,486 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 15:05:44,486 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 15:05:44,486 INFO L85 PathProgramCache]: Analyzing trace with hash -505517487, now seen corresponding path program 1 times [2023-12-20 15:05:44,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 15:05:44,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111469068] [2023-12-20 15:05:44,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 15:05:44,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 15:05:44,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 15:05:44,971 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 177 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2023-12-20 15:05:44,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 15:05:44,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111469068] [2023-12-20 15:05:44,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111469068] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 15:05:44,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 15:05:44,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-20 15:05:44,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401926570] [2023-12-20 15:05:44,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 15:05:44,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-20 15:05:44,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 15:05:44,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-20 15:05:44,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-20 15:05:44,974 INFO L87 Difference]: Start difference. First operand 179989 states and 195654 transitions. Second operand has 4 states, 4 states have (on average 66.25) internal successors, (265), 3 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:05:46,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 15:05:46,609 INFO L93 Difference]: Finished difference Result 359200 states and 390169 transitions. [2023-12-20 15:05:46,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-20 15:05:46,612 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 66.25) internal successors, (265), 3 states have internal predecessors, (265), 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 336 [2023-12-20 15:05:46,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 15:05:46,832 INFO L225 Difference]: With dead ends: 359200 [2023-12-20 15:05:46,832 INFO L226 Difference]: Without dead ends: 188990 [2023-12-20 15:05:46,912 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-20 15:05:46,912 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 339 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 1137 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 1240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 1137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-20 15:05:46,912 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [339 Valid, 116 Invalid, 1240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 1137 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-12-20 15:05:47,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188990 states. [2023-12-20 15:05:49,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188990 to 179380. [2023-12-20 15:05:49,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179380 states, 179379 states have (on average 1.086124908712837) internal successors, (194828), 179379 states have internal predecessors, (194828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:05:49,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179380 states to 179380 states and 194828 transitions. [2023-12-20 15:05:49,697 INFO L78 Accepts]: Start accepts. Automaton has 179380 states and 194828 transitions. Word has length 336 [2023-12-20 15:05:49,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 15:05:49,697 INFO L495 AbstractCegarLoop]: Abstraction has 179380 states and 194828 transitions. [2023-12-20 15:05:49,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 66.25) internal successors, (265), 3 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:05:49,698 INFO L276 IsEmpty]: Start isEmpty. Operand 179380 states and 194828 transitions. [2023-12-20 15:05:49,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 344 [2023-12-20 15:05:49,755 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 15:05:49,756 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 15:05:49,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-12-20 15:05:49,756 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 15:05:49,757 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 15:05:49,757 INFO L85 PathProgramCache]: Analyzing trace with hash 2076616436, now seen corresponding path program 1 times [2023-12-20 15:05:49,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 15:05:49,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008524532] [2023-12-20 15:05:49,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 15:05:49,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 15:05:49,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 15:05:50,052 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 186 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-12-20 15:05:50,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 15:05:50,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008524532] [2023-12-20 15:05:50,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008524532] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 15:05:50,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 15:05:50,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-20 15:05:50,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917641950] [2023-12-20 15:05:50,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 15:05:50,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-20 15:05:50,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 15:05:50,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-20 15:05:50,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-20 15:05:50,054 INFO L87 Difference]: Start difference. First operand 179380 states and 194828 transitions. Second operand has 3 states, 3 states have (on average 101.66666666666667) internal successors, (305), 3 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:05:51,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 15:05:51,575 INFO L93 Difference]: Finished difference Result 352270 states and 382854 transitions. [2023-12-20 15:05:51,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-20 15:05:51,588 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 101.66666666666667) internal successors, (305), 3 states have internal predecessors, (305), 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 343 [2023-12-20 15:05:51,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 15:05:51,873 INFO L225 Difference]: With dead ends: 352270 [2023-12-20 15:05:51,873 INFO L226 Difference]: Without dead ends: 174109 [2023-12-20 15:05:51,967 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-20 15:05:51,970 INFO L413 NwaCegarLoop]: 264 mSDtfsCounter, 101 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 540 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-20 15:05:51,970 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 272 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 540 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-20 15:05:52,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174109 states. [2023-12-20 15:05:53,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174109 to 170241. [2023-12-20 15:05:53,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170241 states, 170240 states have (on average 1.0806038533834585) internal successors, (183962), 170240 states have internal predecessors, (183962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:05:54,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170241 states to 170241 states and 183962 transitions. [2023-12-20 15:05:54,509 INFO L78 Accepts]: Start accepts. Automaton has 170241 states and 183962 transitions. Word has length 343 [2023-12-20 15:05:54,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 15:05:54,509 INFO L495 AbstractCegarLoop]: Abstraction has 170241 states and 183962 transitions. [2023-12-20 15:05:54,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 101.66666666666667) internal successors, (305), 3 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:05:54,511 INFO L276 IsEmpty]: Start isEmpty. Operand 170241 states and 183962 transitions. [2023-12-20 15:05:54,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 375 [2023-12-20 15:05:54,553 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 15:05:54,553 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 15:05:54,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-12-20 15:05:54,553 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 15:05:54,554 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 15:05:54,554 INFO L85 PathProgramCache]: Analyzing trace with hash 1404165279, now seen corresponding path program 1 times [2023-12-20 15:05:54,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 15:05:54,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832262630] [2023-12-20 15:05:54,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 15:05:54,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 15:05:54,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 15:05:54,787 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 215 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2023-12-20 15:05:54,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 15:05:54,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832262630] [2023-12-20 15:05:54,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832262630] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 15:05:54,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 15:05:54,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-20 15:05:54,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234790443] [2023-12-20 15:05:54,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 15:05:54,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-20 15:05:54,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 15:05:54,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-20 15:05:54,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-20 15:05:54,789 INFO L87 Difference]: Start difference. First operand 170241 states and 183962 transitions. Second operand has 3 states, 3 states have (on average 96.0) internal successors, (288), 2 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:05:56,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 15:05:56,320 INFO L93 Difference]: Finished difference Result 472677 states and 510513 transitions. [2023-12-20 15:05:56,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-20 15:05:56,320 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 96.0) internal successors, (288), 2 states have internal predecessors, (288), 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 374 [2023-12-20 15:05:56,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 15:05:56,759 INFO L225 Difference]: With dead ends: 472677 [2023-12-20 15:05:56,759 INFO L226 Difference]: Without dead ends: 303657 [2023-12-20 15:05:56,881 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 [2023-12-20 15:05:56,881 INFO L413 NwaCegarLoop]: 242 mSDtfsCounter, 182 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 474 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-20 15:05:56,881 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [182 Valid, 474 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-20 15:05:57,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303657 states. [2023-12-20 15:06:00,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303657 to 299783. [2023-12-20 15:06:00,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299783 states, 299782 states have (on average 1.07948108959177) internal successors, (323609), 299782 states have internal predecessors, (323609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:06:01,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299783 states to 299783 states and 323609 transitions. [2023-12-20 15:06:01,340 INFO L78 Accepts]: Start accepts. Automaton has 299783 states and 323609 transitions. Word has length 374 [2023-12-20 15:06:01,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 15:06:01,340 INFO L495 AbstractCegarLoop]: Abstraction has 299783 states and 323609 transitions. [2023-12-20 15:06:01,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 96.0) internal successors, (288), 2 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:06:01,341 INFO L276 IsEmpty]: Start isEmpty. Operand 299783 states and 323609 transitions. [2023-12-20 15:06:01,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 398 [2023-12-20 15:06:01,377 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 15:06:01,378 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 15:06:01,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-12-20 15:06:01,378 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 15:06:01,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 15:06:01,378 INFO L85 PathProgramCache]: Analyzing trace with hash -1793211321, now seen corresponding path program 1 times [2023-12-20 15:06:01,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 15:06:01,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499215939] [2023-12-20 15:06:01,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 15:06:01,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 15:06:01,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 15:06:02,084 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 246 proven. 9 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2023-12-20 15:06:02,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 15:06:02,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499215939] [2023-12-20 15:06:02,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499215939] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 15:06:02,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130903657] [2023-12-20 15:06:02,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 15:06:02,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 15:06:02,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 15:06:02,087 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) [2023-12-20 15:06:02,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-20 15:06:02,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 15:06:02,290 INFO L262 TraceCheckSpWp]: Trace formula consists of 675 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-20 15:06:02,295 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 15:06:02,320 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 249 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2023-12-20 15:06:02,320 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-20 15:06:02,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130903657] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 15:06:02,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-20 15:06:02,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2023-12-20 15:06:02,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685425411] [2023-12-20 15:06:02,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 15:06:02,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-20 15:06:02,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 15:06:02,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-20 15:06:02,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-12-20 15:06:02,322 INFO L87 Difference]: Start difference. First operand 299783 states and 323609 transitions. Second operand has 3 states, 3 states have (on average 103.66666666666667) internal successors, (311), 3 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:06:04,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 15:06:04,666 INFO L93 Difference]: Finished difference Result 591074 states and 637913 transitions. [2023-12-20 15:06:04,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-20 15:06:04,666 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 103.66666666666667) internal successors, (311), 3 states have internal predecessors, (311), 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 397 [2023-12-20 15:06:04,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 15:06:05,521 INFO L225 Difference]: With dead ends: 591074 [2023-12-20 15:06:05,521 INFO L226 Difference]: Without dead ends: 292713 [2023-12-20 15:06:05,693 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 400 GetRequests, 396 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-12-20 15:06:05,698 INFO L413 NwaCegarLoop]: 319 mSDtfsCounter, 210 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 539 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 539 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-20 15:06:05,698 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [210 Valid, 334 Invalid, 595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 539 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-20 15:06:06,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292713 states. [2023-12-20 15:06:09,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292713 to 280651. [2023-12-20 15:06:09,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280651 states, 280650 states have (on average 1.0720220915731338) internal successors, (300863), 280650 states have internal predecessors, (300863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:06:10,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280651 states to 280651 states and 300863 transitions. [2023-12-20 15:06:10,242 INFO L78 Accepts]: Start accepts. Automaton has 280651 states and 300863 transitions. Word has length 397 [2023-12-20 15:06:10,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 15:06:10,242 INFO L495 AbstractCegarLoop]: Abstraction has 280651 states and 300863 transitions. [2023-12-20 15:06:10,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 103.66666666666667) internal successors, (311), 3 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:06:10,242 INFO L276 IsEmpty]: Start isEmpty. Operand 280651 states and 300863 transitions. [2023-12-20 15:06:10,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 400 [2023-12-20 15:06:10,276 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 15:06:10,276 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 15:06:10,282 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-12-20 15:06:10,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 15:06:10,477 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 15:06:10,478 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 15:06:10,478 INFO L85 PathProgramCache]: Analyzing trace with hash -952035576, now seen corresponding path program 1 times [2023-12-20 15:06:10,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 15:06:10,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453048179] [2023-12-20 15:06:10,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 15:06:10,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 15:06:10,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 15:06:11,049 INFO L134 CoverageAnalysis]: Checked inductivity of 389 backedges. 349 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-12-20 15:06:11,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 15:06:11,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453048179] [2023-12-20 15:06:11,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453048179] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 15:06:11,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 15:06:11,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-20 15:06:11,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541490888] [2023-12-20 15:06:11,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 15:06:11,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-20 15:06:11,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 15:06:11,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-20 15:06:11,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-20 15:06:11,052 INFO L87 Difference]: Start difference. First operand 280651 states and 300863 transitions. Second operand has 4 states, 4 states have (on average 90.25) internal successors, (361), 3 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:06:12,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 15:06:12,994 INFO L93 Difference]: Finished difference Result 453118 states and 484868 transitions. [2023-12-20 15:06:12,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-20 15:06:12,994 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 90.25) internal successors, (361), 3 states have internal predecessors, (361), 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 399 [2023-12-20 15:06:12,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 15:06:13,233 INFO L225 Difference]: With dead ends: 453118 [2023-12-20 15:06:13,233 INFO L226 Difference]: Without dead ends: 166378 [2023-12-20 15:06:13,346 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-20 15:06:13,346 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 342 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 806 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 342 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 850 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 806 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-20 15:06:13,347 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [342 Valid, 60 Invalid, 850 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 806 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-20 15:06:13,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166378 states. [2023-12-20 15:06:15,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166378 to 150325. [2023-12-20 15:06:15,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150325 states, 150324 states have (on average 1.0630970437189005) internal successors, (159809), 150324 states have internal predecessors, (159809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:06:15,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150325 states to 150325 states and 159809 transitions. [2023-12-20 15:06:15,435 INFO L78 Accepts]: Start accepts. Automaton has 150325 states and 159809 transitions. Word has length 399 [2023-12-20 15:06:15,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 15:06:15,436 INFO L495 AbstractCegarLoop]: Abstraction has 150325 states and 159809 transitions. [2023-12-20 15:06:15,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 90.25) internal successors, (361), 3 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:06:15,436 INFO L276 IsEmpty]: Start isEmpty. Operand 150325 states and 159809 transitions. [2023-12-20 15:06:15,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 400 [2023-12-20 15:06:15,465 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 15:06:15,465 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 15:06:15,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-12-20 15:06:15,466 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 15:06:15,466 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 15:06:15,466 INFO L85 PathProgramCache]: Analyzing trace with hash 1489850980, now seen corresponding path program 1 times [2023-12-20 15:06:15,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 15:06:15,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574108660] [2023-12-20 15:06:15,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 15:06:15,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 15:06:15,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 15:06:16,399 INFO L134 CoverageAnalysis]: Checked inductivity of 466 backedges. 222 proven. 0 refuted. 0 times theorem prover too weak. 244 trivial. 0 not checked. [2023-12-20 15:06:16,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 15:06:16,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574108660] [2023-12-20 15:06:16,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574108660] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 15:06:16,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 15:06:16,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-20 15:06:16,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835322863] [2023-12-20 15:06:16,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 15:06:16,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-20 15:06:16,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 15:06:16,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-20 15:06:16,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-20 15:06:16,401 INFO L87 Difference]: Start difference. First operand 150325 states and 159809 transitions. Second operand has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 2 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:06:17,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 15:06:17,623 INFO L93 Difference]: Finished difference Result 298210 states and 317096 transitions. [2023-12-20 15:06:17,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-20 15:06:17,624 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 2 states have internal predecessors, (241), 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 399 [2023-12-20 15:06:17,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 15:06:17,812 INFO L225 Difference]: With dead ends: 298210 [2023-12-20 15:06:17,812 INFO L226 Difference]: Without dead ends: 149104 [2023-12-20 15:06:17,887 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 [2023-12-20 15:06:17,888 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 133 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-20 15:06:17,888 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 113 Invalid, 497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 496 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-20 15:06:17,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149104 states. [2023-12-20 15:06:19,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149104 to 149103. [2023-12-20 15:06:19,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149103 states, 149102 states have (on average 1.0633458974393368) internal successors, (158547), 149102 states have internal predecessors, (158547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:06:19,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149103 states to 149103 states and 158547 transitions. [2023-12-20 15:06:19,759 INFO L78 Accepts]: Start accepts. Automaton has 149103 states and 158547 transitions. Word has length 399 [2023-12-20 15:06:19,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 15:06:19,759 INFO L495 AbstractCegarLoop]: Abstraction has 149103 states and 158547 transitions. [2023-12-20 15:06:19,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 2 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:06:19,759 INFO L276 IsEmpty]: Start isEmpty. Operand 149103 states and 158547 transitions. [2023-12-20 15:06:19,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 416 [2023-12-20 15:06:19,785 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 15:06:19,785 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 15:06:19,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-12-20 15:06:19,785 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 15:06:19,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 15:06:19,786 INFO L85 PathProgramCache]: Analyzing trace with hash -689570609, now seen corresponding path program 1 times [2023-12-20 15:06:19,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 15:06:19,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347218660] [2023-12-20 15:06:19,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 15:06:19,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 15:06:19,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 15:06:20,491 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 262 proven. 6 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2023-12-20 15:06:20,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 15:06:20,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347218660] [2023-12-20 15:06:20,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347218660] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 15:06:20,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182029243] [2023-12-20 15:06:20,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 15:06:20,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 15:06:20,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 15:06:20,493 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) [2023-12-20 15:06:20,495 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-20 15:06:20,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 15:06:20,804 INFO L262 TraceCheckSpWp]: Trace formula consists of 686 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-20 15:06:20,810 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 15:06:21,148 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 268 proven. 0 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2023-12-20 15:06:21,148 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-20 15:06:21,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182029243] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 15:06:21,149 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-20 15:06:21,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-12-20 15:06:21,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786552891] [2023-12-20 15:06:21,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 15:06:21,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-20 15:06:21,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 15:06:21,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-20 15:06:21,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-20 15:06:21,150 INFO L87 Difference]: Start difference. First operand 149103 states and 158547 transitions. Second operand has 3 states, 3 states have (on average 104.0) internal successors, (312), 3 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:06:22,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 15:06:22,232 INFO L93 Difference]: Finished difference Result 297004 states and 315924 transitions. [2023-12-20 15:06:22,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-20 15:06:22,233 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 104.0) internal successors, (312), 3 states have internal predecessors, (312), 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 415 [2023-12-20 15:06:22,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 15:06:22,424 INFO L225 Difference]: With dead ends: 297004 [2023-12-20 15:06:22,425 INFO L226 Difference]: Without dead ends: 149120 [2023-12-20 15:06:22,498 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 414 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-20 15:06:22,498 INFO L413 NwaCegarLoop]: 308 mSDtfsCounter, 71 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 530 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-20 15:06:22,498 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 323 Invalid, 563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 530 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-20 15:06:22,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149120 states. [2023-12-20 15:06:24,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149120 to 137942. [2023-12-20 15:06:24,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137942 states, 137941 states have (on average 1.0648175669307893) internal successors, (146882), 137941 states have internal predecessors, (146882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:06:24,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137942 states to 137942 states and 146882 transitions. [2023-12-20 15:06:24,407 INFO L78 Accepts]: Start accepts. Automaton has 137942 states and 146882 transitions. Word has length 415 [2023-12-20 15:06:24,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 15:06:24,407 INFO L495 AbstractCegarLoop]: Abstraction has 137942 states and 146882 transitions. [2023-12-20 15:06:24,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 104.0) internal successors, (312), 3 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:06:24,407 INFO L276 IsEmpty]: Start isEmpty. Operand 137942 states and 146882 transitions. [2023-12-20 15:06:24,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 417 [2023-12-20 15:06:24,433 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 15:06:24,434 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 15:06:24,439 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-12-20 15:06:24,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 15:06:24,634 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 15:06:24,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 15:06:24,635 INFO L85 PathProgramCache]: Analyzing trace with hash 668988754, now seen corresponding path program 1 times [2023-12-20 15:06:24,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 15:06:24,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850627938] [2023-12-20 15:06:24,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 15:06:24,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 15:06:24,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 15:06:25,349 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 362 proven. 12 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-12-20 15:06:25,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 15:06:25,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850627938] [2023-12-20 15:06:25,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850627938] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 15:06:25,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027217700] [2023-12-20 15:06:25,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 15:06:25,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 15:06:25,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 15:06:25,352 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) [2023-12-20 15:06:25,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-20 15:06:25,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 15:06:25,673 INFO L262 TraceCheckSpWp]: Trace formula consists of 688 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-20 15:06:25,677 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 15:06:25,835 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 368 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-12-20 15:06:25,835 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-20 15:06:25,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027217700] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 15:06:25,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-20 15:06:25,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2023-12-20 15:06:25,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931641879] [2023-12-20 15:06:25,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 15:06:25,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-20 15:06:25,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 15:06:25,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-20 15:06:25,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-12-20 15:06:25,837 INFO L87 Difference]: Start difference. First operand 137942 states and 146882 transitions. Second operand has 3 states, 3 states have (on average 126.0) internal successors, (378), 3 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:06:26,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 15:06:26,935 INFO L93 Difference]: Finished difference Result 275907 states and 293841 transitions. [2023-12-20 15:06:26,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-20 15:06:26,936 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 126.0) internal successors, (378), 3 states have internal predecessors, (378), 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 416 [2023-12-20 15:06:26,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 15:06:27,095 INFO L225 Difference]: With dead ends: 275907 [2023-12-20 15:06:27,096 INFO L226 Difference]: Without dead ends: 139184 [2023-12-20 15:06:27,153 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 419 GetRequests, 415 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-12-20 15:06:27,154 INFO L413 NwaCegarLoop]: 307 mSDtfsCounter, 139 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 535 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-20 15:06:27,154 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 322 Invalid, 562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 535 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-20 15:06:27,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139184 states. [2023-12-20 15:06:28,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139184 to 139156. [2023-12-20 15:06:28,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139156 states, 139155 states have (on average 1.0631382271567675) internal successors, (147941), 139155 states have internal predecessors, (147941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:06:29,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139156 states to 139156 states and 147941 transitions. [2023-12-20 15:06:29,005 INFO L78 Accepts]: Start accepts. Automaton has 139156 states and 147941 transitions. Word has length 416 [2023-12-20 15:06:29,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 15:06:29,005 INFO L495 AbstractCegarLoop]: Abstraction has 139156 states and 147941 transitions. [2023-12-20 15:06:29,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 126.0) internal successors, (378), 3 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:06:29,005 INFO L276 IsEmpty]: Start isEmpty. Operand 139156 states and 147941 transitions. [2023-12-20 15:06:29,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 428 [2023-12-20 15:06:29,032 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 15:06:29,032 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 15:06:29,038 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-12-20 15:06:29,233 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,SelfDestructingSolverStorable28 [2023-12-20 15:06:29,233 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 15:06:29,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 15:06:29,234 INFO L85 PathProgramCache]: Analyzing trace with hash 127707230, now seen corresponding path program 1 times [2023-12-20 15:06:29,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 15:06:29,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658193754] [2023-12-20 15:06:29,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 15:06:29,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 15:06:29,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 15:06:29,917 INFO L134 CoverageAnalysis]: Checked inductivity of 503 backedges. 345 proven. 158 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 15:06:29,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 15:06:29,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658193754] [2023-12-20 15:06:29,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658193754] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 15:06:29,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806055079] [2023-12-20 15:06:29,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 15:06:29,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 15:06:29,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 15:06:29,924 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) [2023-12-20 15:06:29,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-20 15:06:30,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 15:06:30,121 INFO L262 TraceCheckSpWp]: Trace formula consists of 706 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-20 15:06:30,128 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 15:06:30,389 INFO L134 CoverageAnalysis]: Checked inductivity of 503 backedges. 262 proven. 0 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2023-12-20 15:06:30,389 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-20 15:06:30,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806055079] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 15:06:30,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-20 15:06:30,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 5 [2023-12-20 15:06:30,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744027396] [2023-12-20 15:06:30,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 15:06:30,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-20 15:06:30,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 15:06:30,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-20 15:06:30,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-20 15:06:30,391 INFO L87 Difference]: Start difference. First operand 139156 states and 147941 transitions. Second operand has 3 states, 3 states have (on average 90.0) internal successors, (270), 3 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:06:31,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 15:06:31,545 INFO L93 Difference]: Finished difference Result 262033 states and 278110 transitions. [2023-12-20 15:06:31,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-20 15:06:31,554 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 90.0) internal successors, (270), 3 states have internal predecessors, (270), 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 427 [2023-12-20 15:06:31,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 15:06:31,710 INFO L225 Difference]: With dead ends: 262033 [2023-12-20 15:06:31,710 INFO L226 Difference]: Without dead ends: 113540 [2023-12-20 15:06:31,774 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 431 GetRequests, 428 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-20 15:06:31,775 INFO L413 NwaCegarLoop]: 279 mSDtfsCounter, 71 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-20 15:06:31,775 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 294 Invalid, 548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 489 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-20 15:06:31,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113540 states. [2023-12-20 15:06:32,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113540 to 93433. [2023-12-20 15:06:32,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93433 states, 93432 states have (on average 1.046739874989297) internal successors, (97799), 93432 states have internal predecessors, (97799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:06:33,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93433 states to 93433 states and 97799 transitions. [2023-12-20 15:06:33,067 INFO L78 Accepts]: Start accepts. Automaton has 93433 states and 97799 transitions. Word has length 427 [2023-12-20 15:06:33,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 15:06:33,068 INFO L495 AbstractCegarLoop]: Abstraction has 93433 states and 97799 transitions. [2023-12-20 15:06:33,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 90.0) internal successors, (270), 3 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:06:33,068 INFO L276 IsEmpty]: Start isEmpty. Operand 93433 states and 97799 transitions. [2023-12-20 15:06:33,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 451 [2023-12-20 15:06:33,084 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 15:06:33,084 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 15:06:33,090 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-12-20 15:06:33,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 15:06:33,285 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 15:06:33,285 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 15:06:33,285 INFO L85 PathProgramCache]: Analyzing trace with hash 942966217, now seen corresponding path program 2 times [2023-12-20 15:06:33,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 15:06:33,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082762357] [2023-12-20 15:06:33,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 15:06:33,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 15:06:33,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 15:06:34,136 INFO L134 CoverageAnalysis]: Checked inductivity of 550 backedges. 464 proven. 18 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2023-12-20 15:06:34,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 15:06:34,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082762357] [2023-12-20 15:06:34,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082762357] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 15:06:34,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537146491] [2023-12-20 15:06:34,136 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-20 15:06:34,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 15:06:34,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 15:06:34,141 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) [2023-12-20 15:06:34,146 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-20 15:06:34,336 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-20 15:06:34,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 15:06:34,339 INFO L262 TraceCheckSpWp]: Trace formula consists of 754 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-20 15:06:34,346 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 15:06:35,765 INFO L134 CoverageAnalysis]: Checked inductivity of 550 backedges. 359 proven. 123 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2023-12-20 15:06:35,766 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 15:06:37,480 INFO L134 CoverageAnalysis]: Checked inductivity of 550 backedges. 393 proven. 123 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-12-20 15:06:37,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537146491] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 15:06:37,480 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 15:06:37,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 5] total 10 [2023-12-20 15:06:37,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942942970] [2023-12-20 15:06:37,480 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 15:06:37,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-20 15:06:37,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 15:06:37,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-20 15:06:37,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-12-20 15:06:37,483 INFO L87 Difference]: Start difference. First operand 93433 states and 97799 transitions. Second operand has 11 states, 11 states have (on average 77.18181818181819) internal successors, (849), 10 states have internal predecessors, (849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:06:42,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 15:06:42,484 INFO L93 Difference]: Finished difference Result 212852 states and 222998 transitions. [2023-12-20 15:06:42,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-12-20 15:06:42,485 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 77.18181818181819) internal successors, (849), 10 states have internal predecessors, (849), 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 450 [2023-12-20 15:06:42,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 15:06:42,602 INFO L225 Difference]: With dead ends: 212852 [2023-12-20 15:06:42,602 INFO L226 Difference]: Without dead ends: 99526 [2023-12-20 15:06:42,660 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 938 GetRequests, 893 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 647 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=535, Invalid=1627, Unknown=0, NotChecked=0, Total=2162 [2023-12-20 15:06:42,660 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 9037 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 4730 mSolverCounterSat, 660 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9037 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 5390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 660 IncrementalHoareTripleChecker+Valid, 4730 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2023-12-20 15:06:42,661 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9037 Valid, 201 Invalid, 5390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [660 Valid, 4730 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2023-12-20 15:06:42,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99526 states. [2023-12-20 15:06:43,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99526 to 51723. [2023-12-20 15:06:43,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51723 states, 51722 states have (on average 1.0293492131008082) internal successors, (53240), 51722 states have internal predecessors, (53240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:06:43,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51723 states to 51723 states and 53240 transitions. [2023-12-20 15:06:43,686 INFO L78 Accepts]: Start accepts. Automaton has 51723 states and 53240 transitions. Word has length 450 [2023-12-20 15:06:43,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 15:06:43,687 INFO L495 AbstractCegarLoop]: Abstraction has 51723 states and 53240 transitions. [2023-12-20 15:06:43,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 77.18181818181819) internal successors, (849), 10 states have internal predecessors, (849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:06:43,687 INFO L276 IsEmpty]: Start isEmpty. Operand 51723 states and 53240 transitions. [2023-12-20 15:06:43,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 502 [2023-12-20 15:06:43,700 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 15:06:43,700 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 15:06:43,705 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-12-20 15:06:43,900 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,SelfDestructingSolverStorable30 [2023-12-20 15:06:43,901 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 15:06:43,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 15:06:43,901 INFO L85 PathProgramCache]: Analyzing trace with hash 797062232, now seen corresponding path program 1 times [2023-12-20 15:06:43,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 15:06:43,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690244730] [2023-12-20 15:06:43,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 15:06:43,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 15:06:43,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 15:06:44,470 INFO L134 CoverageAnalysis]: Checked inductivity of 769 backedges. 586 proven. 18 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2023-12-20 15:06:44,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 15:06:44,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690244730] [2023-12-20 15:06:44,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690244730] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 15:06:44,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957982420] [2023-12-20 15:06:44,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 15:06:44,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 15:06:44,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 15:06:44,477 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) [2023-12-20 15:06:44,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-20 15:06:44,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 15:06:44,769 INFO L262 TraceCheckSpWp]: Trace formula consists of 867 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-20 15:06:44,780 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 15:06:44,964 INFO L134 CoverageAnalysis]: Checked inductivity of 769 backedges. 483 proven. 0 refuted. 0 times theorem prover too weak. 286 trivial. 0 not checked. [2023-12-20 15:06:44,964 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-20 15:06:44,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957982420] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 15:06:44,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-20 15:06:44,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-12-20 15:06:44,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470237632] [2023-12-20 15:06:44,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 15:06:44,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-20 15:06:44,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 15:06:44,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-20 15:06:44,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-20 15:06:44,966 INFO L87 Difference]: Start difference. First operand 51723 states and 53240 transitions. Second operand has 3 states, 3 states have (on average 97.66666666666667) internal successors, (293), 2 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:06:45,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 15:06:45,428 INFO L93 Difference]: Finished difference Result 149862 states and 154244 transitions. [2023-12-20 15:06:45,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-20 15:06:45,429 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 97.66666666666667) internal successors, (293), 2 states have internal predecessors, (293), 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 501 [2023-12-20 15:06:45,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 15:06:45,534 INFO L225 Difference]: With dead ends: 149862 [2023-12-20 15:06:45,534 INFO L226 Difference]: Without dead ends: 98546 [2023-12-20 15:06:45,575 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 505 GetRequests, 501 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-20 15:06:45,576 INFO L413 NwaCegarLoop]: 229 mSDtfsCounter, 151 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 15:06:45,577 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 447 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 15:06:45,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98546 states. [2023-12-20 15:06:46,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98546 to 95897. [2023-12-20 15:06:46,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95897 states, 95896 states have (on average 1.029594560774172) internal successors, (98734), 95896 states have internal predecessors, (98734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:06:46,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95897 states to 95897 states and 98734 transitions. [2023-12-20 15:06:46,771 INFO L78 Accepts]: Start accepts. Automaton has 95897 states and 98734 transitions. Word has length 501 [2023-12-20 15:06:46,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 15:06:46,771 INFO L495 AbstractCegarLoop]: Abstraction has 95897 states and 98734 transitions. [2023-12-20 15:06:46,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 97.66666666666667) internal successors, (293), 2 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:06:46,772 INFO L276 IsEmpty]: Start isEmpty. Operand 95897 states and 98734 transitions. [2023-12-20 15:06:46,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 551 [2023-12-20 15:06:46,787 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 15:06:46,787 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 15:06:46,793 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-12-20 15:06:46,993 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,SelfDestructingSolverStorable31 [2023-12-20 15:06:46,994 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 15:06:46,994 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 15:06:46,994 INFO L85 PathProgramCache]: Analyzing trace with hash -399711636, now seen corresponding path program 1 times [2023-12-20 15:06:46,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 15:06:46,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142430771] [2023-12-20 15:06:46,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 15:06:46,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 15:06:47,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 15:06:48,277 INFO L134 CoverageAnalysis]: Checked inductivity of 843 backedges. 588 proven. 147 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2023-12-20 15:06:48,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 15:06:48,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142430771] [2023-12-20 15:06:48,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142430771] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 15:06:48,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983422548] [2023-12-20 15:06:48,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 15:06:48,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 15:06:48,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 15:06:48,279 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) [2023-12-20 15:06:48,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-20 15:06:48,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 15:06:48,505 INFO L262 TraceCheckSpWp]: Trace formula consists of 819 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-20 15:06:48,517 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 15:06:48,765 INFO L134 CoverageAnalysis]: Checked inductivity of 843 backedges. 535 proven. 0 refuted. 0 times theorem prover too weak. 308 trivial. 0 not checked. [2023-12-20 15:06:48,765 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-20 15:06:48,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983422548] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 15:06:48,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-20 15:06:48,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2023-12-20 15:06:48,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932585416] [2023-12-20 15:06:48,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 15:06:48,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-20 15:06:48,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 15:06:48,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-20 15:06:48,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-12-20 15:06:48,767 INFO L87 Difference]: Start difference. First operand 95897 states and 98734 transitions. Second operand has 3 states, 3 states have (on average 99.0) internal successors, (297), 3 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:06:49,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 15:06:49,750 INFO L93 Difference]: Finished difference Result 199547 states and 205475 transitions. [2023-12-20 15:06:49,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-20 15:06:49,750 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 99.0) internal successors, (297), 3 states have internal predecessors, (297), 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 550 [2023-12-20 15:06:49,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 15:06:49,884 INFO L225 Difference]: With dead ends: 199547 [2023-12-20 15:06:49,884 INFO L226 Difference]: Without dead ends: 104057 [2023-12-20 15:06:49,932 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 553 GetRequests, 549 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-12-20 15:06:49,932 INFO L413 NwaCegarLoop]: 284 mSDtfsCounter, 59 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-20 15:06:49,932 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 308 Invalid, 513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 455 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-20 15:06:50,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104057 states. [2023-12-20 15:06:51,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104057 to 97521. [2023-12-20 15:06:51,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97521 states, 97520 states have (on average 1.0295734208367515) internal successors, (100404), 97520 states have internal predecessors, (100404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:06:51,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97521 states to 97521 states and 100404 transitions. [2023-12-20 15:06:51,207 INFO L78 Accepts]: Start accepts. Automaton has 97521 states and 100404 transitions. Word has length 550 [2023-12-20 15:06:51,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 15:06:51,207 INFO L495 AbstractCegarLoop]: Abstraction has 97521 states and 100404 transitions. [2023-12-20 15:06:51,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 99.0) internal successors, (297), 3 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:06:51,207 INFO L276 IsEmpty]: Start isEmpty. Operand 97521 states and 100404 transitions. [2023-12-20 15:06:51,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 555 [2023-12-20 15:06:51,222 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 15:06:51,222 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 15:06:51,228 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-12-20 15:06:51,423 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,SelfDestructingSolverStorable32 [2023-12-20 15:06:51,423 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 15:06:51,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 15:06:51,424 INFO L85 PathProgramCache]: Analyzing trace with hash 1083391330, now seen corresponding path program 1 times [2023-12-20 15:06:51,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 15:06:51,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461533659] [2023-12-20 15:06:51,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 15:06:51,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 15:06:51,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 15:06:52,121 INFO L134 CoverageAnalysis]: Checked inductivity of 1173 backedges. 800 proven. 24 refuted. 0 times theorem prover too weak. 349 trivial. 0 not checked. [2023-12-20 15:06:52,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 15:06:52,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461533659] [2023-12-20 15:06:52,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461533659] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 15:06:52,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958932872] [2023-12-20 15:06:52,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 15:06:52,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 15:06:52,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 15:06:52,123 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) [2023-12-20 15:06:52,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-20 15:06:52,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 15:06:52,432 INFO L262 TraceCheckSpWp]: Trace formula consists of 973 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-20 15:06:52,444 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 15:06:52,484 INFO L134 CoverageAnalysis]: Checked inductivity of 1173 backedges. 588 proven. 0 refuted. 0 times theorem prover too weak. 585 trivial. 0 not checked. [2023-12-20 15:06:52,484 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-20 15:06:52,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958932872] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 15:06:52,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-20 15:06:52,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2023-12-20 15:06:52,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302855648] [2023-12-20 15:06:52,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 15:06:52,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-20 15:06:52,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 15:06:52,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-20 15:06:52,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-12-20 15:06:52,487 INFO L87 Difference]: Start difference. First operand 97521 states and 100404 transitions. Second operand has 3 states, 3 states have (on average 108.66666666666667) internal successors, (326), 3 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) [2023-12-20 15:06:53,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 15:06:53,150 INFO L93 Difference]: Finished difference Result 199710 states and 205518 transitions. [2023-12-20 15:06:53,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-20 15:06:53,150 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 108.66666666666667) internal successors, (326), 3 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) Word has length 554 [2023-12-20 15:06:53,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 15:06:53,245 INFO L225 Difference]: With dead ends: 199710 [2023-12-20 15:06:53,245 INFO L226 Difference]: Without dead ends: 94679 [2023-12-20 15:06:53,465 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 557 GetRequests, 553 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-12-20 15:06:53,466 INFO L413 NwaCegarLoop]: 435 mSDtfsCounter, 173 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 622 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-20 15:06:53,466 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 622 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-20 15:06:53,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94679 states. [2023-12-20 15:06:54,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94679 to 92243. [2023-12-20 15:06:54,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92243 states, 92242 states have (on average 1.0285227987250927) internal successors, (94873), 92242 states have internal predecessors, (94873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:06:54,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92243 states to 92243 states and 94873 transitions. [2023-12-20 15:06:54,614 INFO L78 Accepts]: Start accepts. Automaton has 92243 states and 94873 transitions. Word has length 554 [2023-12-20 15:06:54,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 15:06:54,614 INFO L495 AbstractCegarLoop]: Abstraction has 92243 states and 94873 transitions. [2023-12-20 15:06:54,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 108.66666666666667) internal successors, (326), 3 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) [2023-12-20 15:06:54,615 INFO L276 IsEmpty]: Start isEmpty. Operand 92243 states and 94873 transitions. [2023-12-20 15:06:54,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 581 [2023-12-20 15:06:54,652 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 15:06:54,652 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 15:06:54,660 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-12-20 15:06:54,859 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,SelfDestructingSolverStorable33 [2023-12-20 15:06:54,860 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 15:06:54,860 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 15:06:54,860 INFO L85 PathProgramCache]: Analyzing trace with hash -311196162, now seen corresponding path program 1 times [2023-12-20 15:06:54,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 15:06:54,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235827798] [2023-12-20 15:06:54,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 15:06:54,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 15:06:54,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 15:06:56,534 INFO L134 CoverageAnalysis]: Checked inductivity of 893 backedges. 403 proven. 6 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2023-12-20 15:06:56,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 15:06:56,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235827798] [2023-12-20 15:06:56,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235827798] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 15:06:56,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2147081247] [2023-12-20 15:06:56,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 15:06:56,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 15:06:56,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 15:06:56,537 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 15:06:56,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-12-20 15:06:56,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 15:06:56,836 INFO L262 TraceCheckSpWp]: Trace formula consists of 897 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-20 15:06:56,841 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 15:06:56,998 INFO L134 CoverageAnalysis]: Checked inductivity of 893 backedges. 732 proven. 0 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2023-12-20 15:06:56,999 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-20 15:06:56,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2147081247] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 15:06:56,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-20 15:06:56,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2023-12-20 15:06:56,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661637546] [2023-12-20 15:06:56,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 15:06:57,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-20 15:06:57,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 15:06:57,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-20 15:06:57,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-20 15:06:57,001 INFO L87 Difference]: Start difference. First operand 92243 states and 94873 transitions. Second operand has 3 states, 3 states have (on average 142.66666666666666) internal successors, (428), 3 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:06:57,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 15:06:57,606 INFO L93 Difference]: Finished difference Result 197309 states and 202892 transitions. [2023-12-20 15:06:57,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-20 15:06:57,607 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 142.66666666666666) internal successors, (428), 3 states have internal predecessors, (428), 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 580 [2023-12-20 15:06:57,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 15:06:57,723 INFO L225 Difference]: With dead ends: 197309 [2023-12-20 15:06:57,723 INFO L226 Difference]: Without dead ends: 104861 [2023-12-20 15:06:57,760 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 583 GetRequests, 579 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-20 15:06:57,760 INFO L413 NwaCegarLoop]: 457 mSDtfsCounter, 108 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 653 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 15:06:57,761 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 653 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 15:06:57,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104861 states. [2023-12-20 15:06:58,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104861 to 103030. [2023-12-20 15:06:58,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103030 states, 103029 states have (on average 1.0270506362286347) internal successors, (105816), 103029 states have internal predecessors, (105816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:06:58,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103030 states to 103030 states and 105816 transitions. [2023-12-20 15:06:58,816 INFO L78 Accepts]: Start accepts. Automaton has 103030 states and 105816 transitions. Word has length 580 [2023-12-20 15:06:58,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 15:06:58,817 INFO L495 AbstractCegarLoop]: Abstraction has 103030 states and 105816 transitions. [2023-12-20 15:06:58,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 142.66666666666666) internal successors, (428), 3 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:06:58,817 INFO L276 IsEmpty]: Start isEmpty. Operand 103030 states and 105816 transitions. [2023-12-20 15:06:58,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 585 [2023-12-20 15:06:58,839 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 15:06:58,839 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 15:06:58,848 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-12-20 15:06:59,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 15:06:59,047 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 15:06:59,047 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 15:06:59,047 INFO L85 PathProgramCache]: Analyzing trace with hash -54162923, now seen corresponding path program 1 times [2023-12-20 15:06:59,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 15:06:59,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836809006] [2023-12-20 15:06:59,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 15:06:59,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 15:06:59,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 15:07:00,047 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 689 proven. 147 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2023-12-20 15:07:00,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 15:07:00,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836809006] [2023-12-20 15:07:00,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836809006] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 15:07:00,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879494209] [2023-12-20 15:07:00,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 15:07:00,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 15:07:00,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 15:07:00,050 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 15:07:00,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-12-20 15:07:00,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 15:07:00,283 INFO L262 TraceCheckSpWp]: Trace formula consists of 885 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-20 15:07:00,289 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 15:07:00,766 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 556 proven. 0 refuted. 0 times theorem prover too weak. 456 trivial. 0 not checked. [2023-12-20 15:07:00,766 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-20 15:07:00,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879494209] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 15:07:00,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-20 15:07:00,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2023-12-20 15:07:00,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664525358] [2023-12-20 15:07:00,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 15:07:00,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-20 15:07:00,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 15:07:00,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-20 15:07:00,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-12-20 15:07:00,769 INFO L87 Difference]: Start difference. First operand 103030 states and 105816 transitions. Second operand has 4 states, 4 states have (on average 82.75) internal successors, (331), 3 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:07:01,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 15:07:01,752 INFO L93 Difference]: Finished difference Result 210140 states and 215899 transitions. [2023-12-20 15:07:01,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-20 15:07:01,753 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 82.75) internal successors, (331), 3 states have internal predecessors, (331), 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 584 [2023-12-20 15:07:01,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 15:07:01,869 INFO L225 Difference]: With dead ends: 210140 [2023-12-20 15:07:01,869 INFO L226 Difference]: Without dead ends: 106705 [2023-12-20 15:07:01,919 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 587 GetRequests, 582 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-12-20 15:07:01,920 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 430 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 556 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 430 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-20 15:07:01,920 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [430 Valid, 267 Invalid, 589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 556 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-20 15:07:02,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106705 states. [2023-12-20 15:07:02,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106705 to 104244. [2023-12-20 15:07:03,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104244 states, 104243 states have (on average 1.0269946183436778) internal successors, (107057), 104243 states have internal predecessors, (107057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:07:03,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104244 states to 104244 states and 107057 transitions. [2023-12-20 15:07:03,191 INFO L78 Accepts]: Start accepts. Automaton has 104244 states and 107057 transitions. Word has length 584 [2023-12-20 15:07:03,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 15:07:03,191 INFO L495 AbstractCegarLoop]: Abstraction has 104244 states and 107057 transitions. [2023-12-20 15:07:03,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 82.75) internal successors, (331), 3 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 15:07:03,192 INFO L276 IsEmpty]: Start isEmpty. Operand 104244 states and 107057 transitions. [2023-12-20 15:07:03,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 629 [2023-12-20 15:07:03,210 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 15:07:03,210 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 15:07:03,215 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-12-20 15:07:03,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 15:07:03,411 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 15:07:03,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 15:07:03,411 INFO L85 PathProgramCache]: Analyzing trace with hash 1490669014, now seen corresponding path program 1 times [2023-12-20 15:07:03,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 15:07:03,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000965242] [2023-12-20 15:07:03,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 15:07:03,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 15:07:03,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat