/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.use.bitabs.translation true -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/eca-rers2012/Problem03_label44.c -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-15 18:16:42,497 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-15 18:16:42,589 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-12-15 18:16:42,593 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-15 18:16:42,594 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-15 18:16:42,622 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-15 18:16:42,623 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-15 18:16:42,623 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-15 18:16:42,623 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-15 18:16:42,624 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-15 18:16:42,624 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-15 18:16:42,625 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-15 18:16:42,625 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-15 18:16:42,625 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-15 18:16:42,626 INFO L153 SettingsManager]: * Use SBE=true [2023-12-15 18:16:42,626 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-15 18:16:42,626 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-15 18:16:42,627 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-15 18:16:42,627 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-15 18:16:42,627 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-15 18:16:42,628 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-15 18:16:42,629 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-15 18:16:42,629 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-15 18:16:42,630 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-15 18:16:42,630 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-15 18:16:42,630 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-15 18:16:42,630 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-15 18:16:42,631 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-15 18:16:42,631 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-15 18:16:42,631 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-15 18:16:42,632 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-15 18:16:42,632 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-15 18:16:42,633 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-15 18:16:42,633 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-15 18:16:42,633 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-15 18:16:42,633 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-15 18:16:42,633 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-15 18:16:42,634 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-15 18:16:42,634 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-15 18:16:42,634 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-15 18:16:42,634 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-15 18:16:42,634 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-15 18:16:42,634 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-15 18:16:42,635 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> true [2023-12-15 18:16:42,858 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-15 18:16:42,881 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-15 18:16:42,883 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-15 18:16:42,884 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-15 18:16:42,884 INFO L274 PluginConnector]: CDTParser initialized [2023-12-15 18:16:42,885 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label44.c [2023-12-15 18:16:44,023 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-15 18:16:44,335 INFO L384 CDTParser]: Found 1 translation units. [2023-12-15 18:16:44,336 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label44.c [2023-12-15 18:16:44,357 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3cf7ce092/c6792ae79b6040acbb5160aef2f43c0b/FLAGfa1654e96 [2023-12-15 18:16:44,377 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3cf7ce092/c6792ae79b6040acbb5160aef2f43c0b [2023-12-15 18:16:44,380 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-15 18:16:44,381 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-15 18:16:44,382 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-15 18:16:44,383 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-15 18:16:44,387 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-15 18:16:44,387 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 06:16:44" (1/1) ... [2023-12-15 18:16:44,388 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@184141cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 06:16:44, skipping insertion in model container [2023-12-15 18:16:44,388 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 06:16:44" (1/1) ... [2023-12-15 18:16:44,464 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-15 18:16:44,956 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_label44.c[58121,58134] [2023-12-15 18:16:44,999 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-15 18:16:45,013 INFO L202 MainTranslator]: Completed pre-run [2023-12-15 18:16:45,169 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_label44.c[58121,58134] [2023-12-15 18:16:45,181 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-15 18:16:45,197 INFO L206 MainTranslator]: Completed translation [2023-12-15 18:16:45,198 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 06:16:45 WrapperNode [2023-12-15 18:16:45,198 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-15 18:16:45,199 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-15 18:16:45,199 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-15 18:16:45,199 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-15 18:16:45,205 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 06:16:45" (1/1) ... [2023-12-15 18:16:45,241 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 06:16:45" (1/1) ... [2023-12-15 18:16:45,337 INFO L138 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1772 [2023-12-15 18:16:45,338 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-15 18:16:45,338 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-15 18:16:45,338 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-15 18:16:45,339 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-15 18:16:45,349 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 06:16:45" (1/1) ... [2023-12-15 18:16:45,349 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 06:16:45" (1/1) ... [2023-12-15 18:16:45,358 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 06:16:45" (1/1) ... [2023-12-15 18:16:45,401 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]. [2023-12-15 18:16:45,401 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 06:16:45" (1/1) ... [2023-12-15 18:16:45,402 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 06:16:45" (1/1) ... [2023-12-15 18:16:45,447 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 06:16:45" (1/1) ... [2023-12-15 18:16:45,467 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 06:16:45" (1/1) ... [2023-12-15 18:16:45,475 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 06:16:45" (1/1) ... [2023-12-15 18:16:45,486 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 06:16:45" (1/1) ... [2023-12-15 18:16:45,497 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-15 18:16:45,499 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-15 18:16:45,499 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-15 18:16:45,499 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-15 18:16:45,501 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 06:16:45" (1/1) ... [2023-12-15 18:16:45,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-15 18:16:45,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 18:16:45,529 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) [2023-12-15 18:16:45,558 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 [2023-12-15 18:16:45,568 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-15 18:16:45,568 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-15 18:16:45,569 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-15 18:16:45,569 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-15 18:16:45,666 INFO L241 CfgBuilder]: Building ICFG [2023-12-15 18:16:45,669 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-15 18:16:47,240 INFO L282 CfgBuilder]: Performing block encoding [2023-12-15 18:16:47,313 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-15 18:16:47,313 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-12-15 18:16:47,314 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 06:16:47 BoogieIcfgContainer [2023-12-15 18:16:47,314 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-15 18:16:47,316 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-15 18:16:47,316 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-15 18:16:47,319 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-15 18:16:47,319 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 06:16:44" (1/3) ... [2023-12-15 18:16:47,319 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ac92bec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 06:16:47, skipping insertion in model container [2023-12-15 18:16:47,320 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 06:16:45" (2/3) ... [2023-12-15 18:16:47,320 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ac92bec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 06:16:47, skipping insertion in model container [2023-12-15 18:16:47,320 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 06:16:47" (3/3) ... [2023-12-15 18:16:47,321 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label44.c [2023-12-15 18:16:47,337 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-15 18:16:47,337 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-15 18:16:47,382 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-15 18:16:47,389 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;@5db8e41e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-15 18:16:47,389 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-15 18:16:47,396 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) [2023-12-15 18:16:47,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2023-12-15 18:16:47,414 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 18:16:47,416 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 18:16:47,416 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 18:16:47,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 18:16:47,421 INFO L85 PathProgramCache]: Analyzing trace with hash -2015107433, now seen corresponding path program 1 times [2023-12-15 18:16:47,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 18:16:47,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388418337] [2023-12-15 18:16:47,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 18:16:47,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 18:16:47,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:16:47,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 18:16:47,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 18:16:47,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388418337] [2023-12-15 18:16:47,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388418337] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 18:16:47,943 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 18:16:47,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-15 18:16:47,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17621910] [2023-12-15 18:16:47,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 18:16:47,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-15 18:16:47,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 18:16:47,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-15 18:16:47,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-15 18:16:47,989 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 88.0) internal successors, (176), 2 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 18:16:48,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 18:16:48,044 INFO L93 Difference]: Finished difference Result 479 states and 913 transitions. [2023-12-15 18:16:48,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-15 18:16:48,047 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 88.0) internal successors, (176), 2 states have internal predecessors, (176), 0 states have call successors, (0), 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 176 [2023-12-15 18:16:48,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 18:16:48,056 INFO L225 Difference]: With dead ends: 479 [2023-12-15 18:16:48,056 INFO L226 Difference]: Without dead ends: 238 [2023-12-15 18:16:48,064 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 [2023-12-15 18:16:48,066 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 [2023-12-15 18:16:48,067 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] [2023-12-15 18:16:48,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2023-12-15 18:16:48,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 238. [2023-12-15 18:16:48,109 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) [2023-12-15 18:16:48,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 392 transitions. [2023-12-15 18:16:48,112 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 392 transitions. Word has length 176 [2023-12-15 18:16:48,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 18:16:48,113 INFO L495 AbstractCegarLoop]: Abstraction has 238 states and 392 transitions. [2023-12-15 18:16:48,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 88.0) internal successors, (176), 2 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 18:16:48,113 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 392 transitions. [2023-12-15 18:16:48,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2023-12-15 18:16:48,115 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 18:16:48,116 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 18:16:48,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-15 18:16:48,116 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 18:16:48,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 18:16:48,117 INFO L85 PathProgramCache]: Analyzing trace with hash 841366142, now seen corresponding path program 1 times [2023-12-15 18:16:48,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 18:16:48,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530413494] [2023-12-15 18:16:48,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 18:16:48,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 18:16:48,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:16:48,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 18:16:48,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 18:16:48,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530413494] [2023-12-15 18:16:48,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530413494] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 18:16:48,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 18:16:48,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-15 18:16:48,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420204208] [2023-12-15 18:16:48,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 18:16:48,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-15 18:16:48,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 18:16:48,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-15 18:16:48,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-15 18:16:48,730 INFO L87 Difference]: Start difference. First operand 238 states and 392 transitions. Second operand has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 2 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 18:16:49,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 18:16:49,568 INFO L93 Difference]: Finished difference Result 696 states and 1149 transitions. [2023-12-15 18:16:49,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-15 18:16:49,569 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 2 states have internal predecessors, (176), 0 states have call successors, (0), 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 176 [2023-12-15 18:16:49,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 18:16:49,574 INFO L225 Difference]: With dead ends: 696 [2023-12-15 18:16:49,574 INFO L226 Difference]: Without dead ends: 459 [2023-12-15 18:16:49,581 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 [2023-12-15 18:16:49,581 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 87 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 625 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-15 18:16:49,582 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 137 Invalid, 703 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 625 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-12-15 18:16:49,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2023-12-15 18:16:49,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 458. [2023-12-15 18:16:49,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 457 states have (on average 1.5514223194748358) internal successors, (709), 457 states have internal predecessors, (709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 18:16:49,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 709 transitions. [2023-12-15 18:16:49,607 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 709 transitions. Word has length 176 [2023-12-15 18:16:49,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 18:16:49,607 INFO L495 AbstractCegarLoop]: Abstraction has 458 states and 709 transitions. [2023-12-15 18:16:49,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 2 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 18:16:49,608 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 709 transitions. [2023-12-15 18:16:49,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2023-12-15 18:16:49,614 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 18:16:49,614 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 18:16:49,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-15 18:16:49,615 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 18:16:49,615 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 18:16:49,616 INFO L85 PathProgramCache]: Analyzing trace with hash -1980218360, now seen corresponding path program 1 times [2023-12-15 18:16:49,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 18:16:49,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350590794] [2023-12-15 18:16:49,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 18:16:49,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 18:16:49,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:16:49,862 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 18:16:49,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 18:16:49,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350590794] [2023-12-15 18:16:49,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350590794] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 18:16:49,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 18:16:49,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-15 18:16:49,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016824728] [2023-12-15 18:16:49,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 18:16:49,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-15 18:16:49,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 18:16:49,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-15 18:16:49,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-15 18:16:49,869 INFO L87 Difference]: Start difference. First operand 458 states and 709 transitions. Second operand has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 2 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 18:16:50,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 18:16:50,601 INFO L93 Difference]: Finished difference Result 1341 states and 2081 transitions. [2023-12-15 18:16:50,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-15 18:16:50,602 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 2 states have internal predecessors, (181), 0 states have call successors, (0), 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 181 [2023-12-15 18:16:50,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 18:16:50,605 INFO L225 Difference]: With dead ends: 1341 [2023-12-15 18:16:50,605 INFO L226 Difference]: Without dead ends: 884 [2023-12-15 18:16:50,606 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 [2023-12-15 18:16:50,607 INFO L413 NwaCegarLoop]: 144 mSDtfsCounter, 251 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 616 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 616 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-15 18:16:50,607 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [251 Valid, 179 Invalid, 718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 616 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-15 18:16:50,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 884 states. [2023-12-15 18:16:50,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 884 to 879. [2023-12-15 18:16:50,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 879 states, 878 states have (on average 1.469248291571754) internal successors, (1290), 878 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 18:16:50,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 879 states to 879 states and 1290 transitions. [2023-12-15 18:16:50,634 INFO L78 Accepts]: Start accepts. Automaton has 879 states and 1290 transitions. Word has length 181 [2023-12-15 18:16:50,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 18:16:50,634 INFO L495 AbstractCegarLoop]: Abstraction has 879 states and 1290 transitions. [2023-12-15 18:16:50,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 2 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 18:16:50,635 INFO L276 IsEmpty]: Start isEmpty. Operand 879 states and 1290 transitions. [2023-12-15 18:16:50,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2023-12-15 18:16:50,638 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 18:16:50,638 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 18:16:50,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-15 18:16:50,638 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 18:16:50,639 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 18:16:50,639 INFO L85 PathProgramCache]: Analyzing trace with hash 1100922815, now seen corresponding path program 1 times [2023-12-15 18:16:50,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 18:16:50,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600765332] [2023-12-15 18:16:50,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 18:16:50,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 18:16:50,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:16:50,806 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 18:16:50,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 18:16:50,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600765332] [2023-12-15 18:16:50,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600765332] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 18:16:50,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 18:16:50,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-15 18:16:50,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669342643] [2023-12-15 18:16:50,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 18:16:50,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-15 18:16:50,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 18:16:50,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-15 18:16:50,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-15 18:16:50,810 INFO L87 Difference]: Start difference. First operand 879 states and 1290 transitions. Second operand has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 2 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 18:16:51,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 18:16:51,562 INFO L93 Difference]: Finished difference Result 2593 states and 3821 transitions. [2023-12-15 18:16:51,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-15 18:16:51,562 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 2 states have internal predecessors, (184), 0 states have call successors, (0), 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 184 [2023-12-15 18:16:51,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 18:16:51,569 INFO L225 Difference]: With dead ends: 2593 [2023-12-15 18:16:51,569 INFO L226 Difference]: Without dead ends: 1715 [2023-12-15 18:16:51,571 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 [2023-12-15 18:16:51,572 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 249 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 585 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-15 18:16:51,572 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [249 Valid, 88 Invalid, 780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 585 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-15 18:16:51,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1715 states. [2023-12-15 18:16:51,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1715 to 1695. [2023-12-15 18:16:51,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1695 states, 1694 states have (on average 1.4397874852420307) internal successors, (2439), 1694 states have internal predecessors, (2439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 18:16:51,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1695 states to 1695 states and 2439 transitions. [2023-12-15 18:16:51,611 INFO L78 Accepts]: Start accepts. Automaton has 1695 states and 2439 transitions. Word has length 184 [2023-12-15 18:16:51,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 18:16:51,612 INFO L495 AbstractCegarLoop]: Abstraction has 1695 states and 2439 transitions. [2023-12-15 18:16:51,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 2 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 18:16:51,612 INFO L276 IsEmpty]: Start isEmpty. Operand 1695 states and 2439 transitions. [2023-12-15 18:16:51,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2023-12-15 18:16:51,616 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 18:16:51,616 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 18:16:51,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-15 18:16:51,616 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 18:16:51,617 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 18:16:51,617 INFO L85 PathProgramCache]: Analyzing trace with hash -1093556594, now seen corresponding path program 1 times [2023-12-15 18:16:51,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 18:16:51,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607140120] [2023-12-15 18:16:51,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 18:16:51,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 18:16:51,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:16:52,285 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-15 18:16:52,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 18:16:52,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607140120] [2023-12-15 18:16:52,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607140120] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 18:16:52,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 18:16:52,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-15 18:16:52,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444987158] [2023-12-15 18:16:52,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 18:16:52,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-15 18:16:52,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 18:16:52,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-15 18:16:52,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-15 18:16:52,288 INFO L87 Difference]: Start difference. First operand 1695 states and 2439 transitions. Second operand has 4 states, 4 states have (on average 46.5) internal successors, (186), 3 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 18:16:53,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 18:16:53,174 INFO L93 Difference]: Finished difference Result 3530 states and 5129 transitions. [2023-12-15 18:16:53,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-15 18:16:53,174 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 46.5) internal successors, (186), 3 states have internal predecessors, (186), 0 states have call successors, (0), 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 191 [2023-12-15 18:16:53,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 18:16:53,181 INFO L225 Difference]: With dead ends: 3530 [2023-12-15 18:16:53,181 INFO L226 Difference]: Without dead ends: 1662 [2023-12-15 18:16:53,183 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 [2023-12-15 18:16:53,184 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 331 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 802 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 982 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 802 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-15 18:16:53,184 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [331 Valid, 44 Invalid, 982 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 802 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-12-15 18:16:53,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1662 states. [2023-12-15 18:16:53,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1662 to 1662. [2023-12-15 18:16:53,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1662 states, 1661 states have (on average 1.3257074051776039) internal successors, (2202), 1661 states have internal predecessors, (2202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 18:16:53,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1662 states to 1662 states and 2202 transitions. [2023-12-15 18:16:53,216 INFO L78 Accepts]: Start accepts. Automaton has 1662 states and 2202 transitions. Word has length 191 [2023-12-15 18:16:53,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 18:16:53,216 INFO L495 AbstractCegarLoop]: Abstraction has 1662 states and 2202 transitions. [2023-12-15 18:16:53,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 46.5) internal successors, (186), 3 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 18:16:53,217 INFO L276 IsEmpty]: Start isEmpty. Operand 1662 states and 2202 transitions. [2023-12-15 18:16:53,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2023-12-15 18:16:53,220 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 18:16:53,221 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 18:16:53,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-15 18:16:53,221 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 18:16:53,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 18:16:53,222 INFO L85 PathProgramCache]: Analyzing trace with hash 1600395689, now seen corresponding path program 1 times [2023-12-15 18:16:53,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 18:16:53,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147809902] [2023-12-15 18:16:53,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 18:16:53,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 18:16:53,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:16:53,762 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 18:16:53,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 18:16:53,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147809902] [2023-12-15 18:16:53,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147809902] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 18:16:53,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 18:16:53,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-15 18:16:53,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561257521] [2023-12-15 18:16:53,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 18:16:53,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-15 18:16:53,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 18:16:53,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-15 18:16:53,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-15 18:16:53,765 INFO L87 Difference]: Start difference. First operand 1662 states and 2202 transitions. Second operand has 4 states, 4 states have (on average 51.75) internal successors, (207), 3 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 18:16:54,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 18:16:54,751 INFO L93 Difference]: Finished difference Result 4322 states and 5742 transitions. [2023-12-15 18:16:54,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-15 18:16:54,751 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 51.75) internal successors, (207), 3 states have internal predecessors, (207), 0 states have call successors, (0), 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 207 [2023-12-15 18:16:54,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 18:16:54,760 INFO L225 Difference]: With dead ends: 4322 [2023-12-15 18:16:54,761 INFO L226 Difference]: Without dead ends: 2487 [2023-12-15 18:16:54,764 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 [2023-12-15 18:16:54,765 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 194 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 995 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 1148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 995 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-12-15 18:16:54,765 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [194 Valid, 91 Invalid, 1148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 995 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-12-15 18:16:54,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2487 states. [2023-12-15 18:16:54,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2487 to 2486. [2023-12-15 18:16:54,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2486 states, 2485 states have (on average 1.3086519114688129) internal successors, (3252), 2485 states have internal predecessors, (3252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 18:16:54,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2486 states to 2486 states and 3252 transitions. [2023-12-15 18:16:54,818 INFO L78 Accepts]: Start accepts. Automaton has 2486 states and 3252 transitions. Word has length 207 [2023-12-15 18:16:54,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 18:16:54,818 INFO L495 AbstractCegarLoop]: Abstraction has 2486 states and 3252 transitions. [2023-12-15 18:16:54,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 51.75) internal successors, (207), 3 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 18:16:54,819 INFO L276 IsEmpty]: Start isEmpty. Operand 2486 states and 3252 transitions. [2023-12-15 18:16:54,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2023-12-15 18:16:54,824 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 18:16:54,824 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 18:16:54,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-12-15 18:16:54,824 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 18:16:54,825 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 18:16:54,825 INFO L85 PathProgramCache]: Analyzing trace with hash 964587886, now seen corresponding path program 1 times [2023-12-15 18:16:54,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 18:16:54,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346459230] [2023-12-15 18:16:54,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 18:16:54,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 18:16:54,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:16:55,077 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-15 18:16:55,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 18:16:55,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346459230] [2023-12-15 18:16:55,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346459230] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 18:16:55,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 18:16:55,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-15 18:16:55,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922668708] [2023-12-15 18:16:55,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 18:16:55,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-15 18:16:55,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 18:16:55,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-15 18:16:55,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-15 18:16:55,080 INFO L87 Difference]: Start difference. First operand 2486 states and 3252 transitions. Second operand has 3 states, 3 states have (on average 68.33333333333333) internal successors, (205), 2 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) [2023-12-15 18:16:55,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 18:16:55,723 INFO L93 Difference]: Finished difference Result 6627 states and 8643 transitions. [2023-12-15 18:16:55,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-15 18:16:55,724 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 68.33333333333333) internal successors, (205), 2 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 209 [2023-12-15 18:16:55,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 18:16:55,737 INFO L225 Difference]: With dead ends: 6627 [2023-12-15 18:16:55,737 INFO L226 Difference]: Without dead ends: 4142 [2023-12-15 18:16:55,740 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 [2023-12-15 18:16:55,741 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 202 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 582 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-15 18:16:55,741 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [202 Valid, 115 Invalid, 643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 582 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-15 18:16:55,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4142 states. [2023-12-15 18:16:55,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4142 to 4139. [2023-12-15 18:16:55,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4139 states, 4138 states have (on average 1.2974867085548574) internal successors, (5369), 4138 states have internal predecessors, (5369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 18:16:55,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4139 states to 4139 states and 5369 transitions. [2023-12-15 18:16:55,809 INFO L78 Accepts]: Start accepts. Automaton has 4139 states and 5369 transitions. Word has length 209 [2023-12-15 18:16:55,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 18:16:55,809 INFO L495 AbstractCegarLoop]: Abstraction has 4139 states and 5369 transitions. [2023-12-15 18:16:55,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.33333333333333) internal successors, (205), 2 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) [2023-12-15 18:16:55,810 INFO L276 IsEmpty]: Start isEmpty. Operand 4139 states and 5369 transitions. [2023-12-15 18:16:55,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2023-12-15 18:16:55,818 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 18:16:55,818 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 18:16:55,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-12-15 18:16:55,819 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 18:16:55,819 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 18:16:55,819 INFO L85 PathProgramCache]: Analyzing trace with hash 1435564538, now seen corresponding path program 1 times [2023-12-15 18:16:55,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 18:16:55,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641741499] [2023-12-15 18:16:55,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 18:16:55,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 18:16:55,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:16:56,177 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 37 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 18:16:56,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 18:16:56,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641741499] [2023-12-15 18:16:56,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641741499] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 18:16:56,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615645272] [2023-12-15 18:16:56,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 18:16:56,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 18:16:56,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 18:16:56,181 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) [2023-12-15 18:16:56,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-15 18:16:56,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:16:56,358 INFO L262 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-15 18:16:56,372 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 18:16:56,645 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-12-15 18:16:56,645 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-15 18:16:56,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615645272] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 18:16:56,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-15 18:16:56,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-12-15 18:16:56,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57997072] [2023-12-15 18:16:56,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 18:16:56,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-15 18:16:56,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 18:16:56,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-15 18:16:56,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-15 18:16:56,647 INFO L87 Difference]: Start difference. First operand 4139 states and 5369 transitions. Second operand has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 3 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 18:16:57,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 18:16:57,323 INFO L93 Difference]: Finished difference Result 8286 states and 10753 transitions. [2023-12-15 18:16:57,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-15 18:16:57,323 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 3 states have internal predecessors, (184), 0 states have call successors, (0), 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 214 [2023-12-15 18:16:57,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 18:16:57,339 INFO L225 Difference]: With dead ends: 8286 [2023-12-15 18:16:57,339 INFO L226 Difference]: Without dead ends: 4148 [2023-12-15 18:16:57,345 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 213 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-15 18:16:57,346 INFO L413 NwaCegarLoop]: 303 mSDtfsCounter, 47 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-15 18:16:57,346 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 317 Invalid, 629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 577 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-15 18:16:57,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4148 states. [2023-12-15 18:16:57,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4148 to 4139. [2023-12-15 18:16:57,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4139 states, 4138 states have (on average 1.2868535524407927) internal successors, (5325), 4138 states have internal predecessors, (5325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 18:16:57,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4139 states to 4139 states and 5325 transitions. [2023-12-15 18:16:57,422 INFO L78 Accepts]: Start accepts. Automaton has 4139 states and 5325 transitions. Word has length 214 [2023-12-15 18:16:57,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 18:16:57,422 INFO L495 AbstractCegarLoop]: Abstraction has 4139 states and 5325 transitions. [2023-12-15 18:16:57,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 3 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 18:16:57,423 INFO L276 IsEmpty]: Start isEmpty. Operand 4139 states and 5325 transitions. [2023-12-15 18:16:57,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2023-12-15 18:16:57,430 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 18:16:57,430 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 18:16:57,439 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-12-15 18:16:57,639 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 [2023-12-15 18:16:57,640 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 18:16:57,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 18:16:57,640 INFO L85 PathProgramCache]: Analyzing trace with hash -2035670570, now seen corresponding path program 1 times [2023-12-15 18:16:57,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 18:16:57,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743335744] [2023-12-15 18:16:57,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 18:16:57,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 18:16:57,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:16:58,004 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 48 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-15 18:16:58,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 18:16:58,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743335744] [2023-12-15 18:16:58,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743335744] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 18:16:58,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785321168] [2023-12-15 18:16:58,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 18:16:58,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 18:16:58,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 18:16:58,008 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) [2023-12-15 18:16:58,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-15 18:16:58,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:16:58,173 INFO L262 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-15 18:16:58,177 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 18:16:58,345 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-15 18:16:58,346 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-15 18:16:58,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785321168] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 18:16:58,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-15 18:16:58,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-12-15 18:16:58,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662211049] [2023-12-15 18:16:58,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 18:16:58,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-15 18:16:58,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 18:16:58,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-15 18:16:58,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-15 18:16:58,348 INFO L87 Difference]: Start difference. First operand 4139 states and 5325 transitions. Second operand has 3 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 18:16:58,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 18:16:58,983 INFO L93 Difference]: Finished difference Result 12343 states and 15879 transitions. [2023-12-15 18:16:58,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-15 18:16:58,983 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 0 states have call successors, (0), 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 [2023-12-15 18:16:58,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 18:16:59,007 INFO L225 Difference]: With dead ends: 12343 [2023-12-15 18:16:59,008 INFO L226 Difference]: Without dead ends: 8205 [2023-12-15 18:16:59,015 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 219 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-15 18:16:59,016 INFO L413 NwaCegarLoop]: 320 mSDtfsCounter, 42 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-15 18:16:59,016 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 340 Invalid, 598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 496 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-15 18:16:59,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8205 states. [2023-12-15 18:16:59,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8205 to 8199. [2023-12-15 18:16:59,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8199 states, 8198 states have (on average 1.1768724079043669) internal successors, (9648), 8198 states have internal predecessors, (9648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 18:16:59,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8199 states to 8199 states and 9648 transitions. [2023-12-15 18:16:59,193 INFO L78 Accepts]: Start accepts. Automaton has 8199 states and 9648 transitions. Word has length 220 [2023-12-15 18:16:59,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 18:16:59,194 INFO L495 AbstractCegarLoop]: Abstraction has 8199 states and 9648 transitions. [2023-12-15 18:16:59,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 18:16:59,194 INFO L276 IsEmpty]: Start isEmpty. Operand 8199 states and 9648 transitions. [2023-12-15 18:16:59,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2023-12-15 18:16:59,207 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 18:16:59,207 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 18:16:59,216 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-15 18:16:59,412 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 [2023-12-15 18:16:59,413 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 18:16:59,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 18:16:59,414 INFO L85 PathProgramCache]: Analyzing trace with hash 1577968896, now seen corresponding path program 1 times [2023-12-15 18:16:59,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 18:16:59,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390788979] [2023-12-15 18:16:59,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 18:16:59,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 18:16:59,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:16:59,593 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 18:16:59,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 18:16:59,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390788979] [2023-12-15 18:16:59,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390788979] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 18:16:59,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 18:16:59,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-15 18:16:59,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186844569] [2023-12-15 18:16:59,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 18:16:59,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-15 18:16:59,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 18:16:59,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-15 18:16:59,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-15 18:16:59,595 INFO L87 Difference]: Start difference. First operand 8199 states and 9648 transitions. Second operand has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 2 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 18:17:00,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 18:17:00,217 INFO L93 Difference]: Finished difference Result 20463 states and 24525 transitions. [2023-12-15 18:17:00,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-15 18:17:00,218 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 2 states have internal predecessors, (220), 0 states have call successors, (0), 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 [2023-12-15 18:17:00,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 18:17:00,248 INFO L225 Difference]: With dead ends: 20463 [2023-12-15 18:17:00,249 INFO L226 Difference]: Without dead ends: 12265 [2023-12-15 18:17:00,259 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 [2023-12-15 18:17:00,260 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 179 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-15 18:17:00,260 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [179 Valid, 112 Invalid, 603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 481 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-15 18:17:00,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12265 states. [2023-12-15 18:17:00,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12265 to 12259. [2023-12-15 18:17:00,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12259 states, 12258 states have (on average 1.1492086800456844) internal successors, (14087), 12258 states have internal predecessors, (14087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 18:17:00,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12259 states to 12259 states and 14087 transitions. [2023-12-15 18:17:00,500 INFO L78 Accepts]: Start accepts. Automaton has 12259 states and 14087 transitions. Word has length 220 [2023-12-15 18:17:00,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 18:17:00,500 INFO L495 AbstractCegarLoop]: Abstraction has 12259 states and 14087 transitions. [2023-12-15 18:17:00,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 2 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 18:17:00,501 INFO L276 IsEmpty]: Start isEmpty. Operand 12259 states and 14087 transitions. [2023-12-15 18:17:00,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2023-12-15 18:17:00,519 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 18:17:00,520 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-12-15 18:17:00,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-12-15 18:17:00,520 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 18:17:00,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 18:17:00,521 INFO L85 PathProgramCache]: Analyzing trace with hash -1260263501, now seen corresponding path program 1 times [2023-12-15 18:17:00,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 18:17:00,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293258491] [2023-12-15 18:17:00,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 18:17:00,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 18:17:00,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:17:00,903 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 74 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 18:17:00,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 18:17:00,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293258491] [2023-12-15 18:17:00,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293258491] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 18:17:00,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 18:17:00,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-15 18:17:00,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019644665] [2023-12-15 18:17:00,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 18:17:00,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-15 18:17:00,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 18:17:00,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-15 18:17:00,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-15 18:17:00,905 INFO L87 Difference]: Start difference. First operand 12259 states and 14087 transitions. Second operand has 3 states, 3 states have (on average 83.66666666666667) internal successors, (251), 2 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 18:17:01,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 18:17:01,586 INFO L93 Difference]: Finished difference Result 34300 states and 39540 transitions. [2023-12-15 18:17:01,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-15 18:17:01,587 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 83.66666666666667) internal successors, (251), 2 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 251 [2023-12-15 18:17:01,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 18:17:01,627 INFO L225 Difference]: With dead ends: 34300 [2023-12-15 18:17:01,628 INFO L226 Difference]: Without dead ends: 22042 [2023-12-15 18:17:01,644 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 [2023-12-15 18:17:01,644 INFO L413 NwaCegarLoop]: 125 mSDtfsCounter, 157 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 623 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 623 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-15 18:17:01,645 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 148 Invalid, 634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 623 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-15 18:17:01,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22042 states. [2023-12-15 18:17:01,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22042 to 19577. [2023-12-15 18:17:01,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19577 states, 19576 states have (on average 1.163261136085002) internal successors, (22772), 19576 states have internal predecessors, (22772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 18:17:01,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19577 states to 19577 states and 22772 transitions. [2023-12-15 18:17:01,992 INFO L78 Accepts]: Start accepts. Automaton has 19577 states and 22772 transitions. Word has length 251 [2023-12-15 18:17:01,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 18:17:01,992 INFO L495 AbstractCegarLoop]: Abstraction has 19577 states and 22772 transitions. [2023-12-15 18:17:01,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 83.66666666666667) internal successors, (251), 2 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 18:17:01,992 INFO L276 IsEmpty]: Start isEmpty. Operand 19577 states and 22772 transitions. [2023-12-15 18:17:02,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2023-12-15 18:17:02,015 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 18:17:02,015 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 18:17:02,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-12-15 18:17:02,015 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 18:17:02,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 18:17:02,016 INFO L85 PathProgramCache]: Analyzing trace with hash 1086878037, now seen corresponding path program 1 times [2023-12-15 18:17:02,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 18:17:02,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782115819] [2023-12-15 18:17:02,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 18:17:02,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 18:17:02,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:17:03,247 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 77 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 18:17:03,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 18:17:03,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782115819] [2023-12-15 18:17:03,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782115819] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 18:17:03,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224208348] [2023-12-15 18:17:03,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 18:17:03,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 18:17:03,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 18:17:03,249 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) [2023-12-15 18:17:03,254 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-15 18:17:03,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:17:03,436 INFO L262 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-15 18:17:03,441 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 18:17:03,615 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-15 18:17:03,615 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-15 18:17:03,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224208348] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 18:17:03,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-15 18:17:03,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2023-12-15 18:17:03,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702327420] [2023-12-15 18:17:03,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 18:17:03,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-15 18:17:03,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 18:17:03,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-15 18:17:03,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-15 18:17:03,617 INFO L87 Difference]: Start difference. First operand 19577 states and 22772 transitions. Second operand has 3 states, 3 states have (on average 83.66666666666667) internal successors, (251), 3 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 18:17:04,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 18:17:04,172 INFO L93 Difference]: Finished difference Result 39159 states and 45553 transitions. [2023-12-15 18:17:04,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-15 18:17:04,176 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 83.66666666666667) internal successors, (251), 3 states have internal predecessors, (251), 0 states have call successors, (0), 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 256 [2023-12-15 18:17:04,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 18:17:04,202 INFO L225 Difference]: With dead ends: 39159 [2023-12-15 18:17:04,202 INFO L226 Difference]: Without dead ends: 19583 [2023-12-15 18:17:04,222 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 255 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-15 18:17:04,222 INFO L413 NwaCegarLoop]: 266 mSDtfsCounter, 86 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 549 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-15 18:17:04,223 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 274 Invalid, 567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 549 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-15 18:17:04,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19583 states. [2023-12-15 18:17:04,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19583 to 18765. [2023-12-15 18:17:04,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18765 states, 18764 states have (on average 1.1510338946919634) internal successors, (21598), 18764 states have internal predecessors, (21598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 18:17:04,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18765 states to 18765 states and 21598 transitions. [2023-12-15 18:17:04,447 INFO L78 Accepts]: Start accepts. Automaton has 18765 states and 21598 transitions. Word has length 256 [2023-12-15 18:17:04,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 18:17:04,448 INFO L495 AbstractCegarLoop]: Abstraction has 18765 states and 21598 transitions. [2023-12-15 18:17:04,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 83.66666666666667) internal successors, (251), 3 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 18:17:04,448 INFO L276 IsEmpty]: Start isEmpty. Operand 18765 states and 21598 transitions. [2023-12-15 18:17:04,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2023-12-15 18:17:04,468 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 18:17:04,468 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 18:17:04,478 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-15 18:17:04,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 18:17:04,676 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 18:17:04,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 18:17:04,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1136116003, now seen corresponding path program 1 times [2023-12-15 18:17:04,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 18:17:04,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283530991] [2023-12-15 18:17:04,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 18:17:04,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 18:17:04,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:17:05,195 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 87 proven. 6 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-12-15 18:17:05,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 18:17:05,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283530991] [2023-12-15 18:17:05,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283530991] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 18:17:05,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080311209] [2023-12-15 18:17:05,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 18:17:05,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 18:17:05,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 18:17:05,198 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) [2023-12-15 18:17:05,220 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-15 18:17:05,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:17:05,387 INFO L262 TraceCheckSpWp]: Trace formula consists of 486 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-15 18:17:05,391 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 18:17:05,434 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 121 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-15 18:17:05,434 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-15 18:17:05,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080311209] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 18:17:05,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-15 18:17:05,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-12-15 18:17:05,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731916193] [2023-12-15 18:17:05,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 18:17:05,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-15 18:17:05,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 18:17:05,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-15 18:17:05,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-15 18:17:05,437 INFO L87 Difference]: Start difference. First operand 18765 states and 21598 transitions. Second operand has 3 states, 3 states have (on average 84.33333333333333) internal successors, (253), 3 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 18:17:06,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 18:17:06,071 INFO L93 Difference]: Finished difference Result 47909 states and 55101 transitions. [2023-12-15 18:17:06,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-15 18:17:06,072 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 84.33333333333333) internal successors, (253), 3 states have internal predecessors, (253), 0 states have call successors, (0), 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 [2023-12-15 18:17:06,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 18:17:06,122 INFO L225 Difference]: With dead ends: 47909 [2023-12-15 18:17:06,122 INFO L226 Difference]: Without dead ends: 29145 [2023-12-15 18:17:06,142 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-15 18:17:06,143 INFO L413 NwaCegarLoop]: 325 mSDtfsCounter, 190 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 552 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-15 18:17:06,143 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [190 Valid, 345 Invalid, 615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 552 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-15 18:17:06,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29145 states. [2023-12-15 18:17:06,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29145 to 29136. [2023-12-15 18:17:06,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29136 states, 29135 states have (on average 1.1352325381843145) internal successors, (33075), 29135 states have internal predecessors, (33075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 18:17:06,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29136 states to 29136 states and 33075 transitions. [2023-12-15 18:17:06,640 INFO L78 Accepts]: Start accepts. Automaton has 29136 states and 33075 transitions. Word has length 258 [2023-12-15 18:17:06,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 18:17:06,641 INFO L495 AbstractCegarLoop]: Abstraction has 29136 states and 33075 transitions. [2023-12-15 18:17:06,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 84.33333333333333) internal successors, (253), 3 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 18:17:06,641 INFO L276 IsEmpty]: Start isEmpty. Operand 29136 states and 33075 transitions. [2023-12-15 18:17:06,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2023-12-15 18:17:06,674 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 18:17:06,674 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, 2, 2, 2, 2, 2, 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] [2023-12-15 18:17:06,685 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-15 18:17:06,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 18:17:06,886 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 18:17:06,886 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 18:17:06,886 INFO L85 PathProgramCache]: Analyzing trace with hash -1176075598, now seen corresponding path program 1 times [2023-12-15 18:17:06,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 18:17:06,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106968597] [2023-12-15 18:17:06,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 18:17:06,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 18:17:07,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:17:08,186 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 125 proven. 6 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-12-15 18:17:08,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 18:17:08,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106968597] [2023-12-15 18:17:08,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106968597] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 18:17:08,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619270000] [2023-12-15 18:17:08,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 18:17:08,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 18:17:08,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 18:17:08,193 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) [2023-12-15 18:17:08,195 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-15 18:17:08,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:17:08,392 INFO L262 TraceCheckSpWp]: Trace formula consists of 533 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-15 18:17:08,405 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 18:17:08,462 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 167 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-15 18:17:08,463 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-15 18:17:08,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619270000] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 18:17:08,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-15 18:17:08,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2023-12-15 18:17:08,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308712450] [2023-12-15 18:17:08,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 18:17:08,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-15 18:17:08,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 18:17:08,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-15 18:17:08,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-15 18:17:08,465 INFO L87 Difference]: Start difference. First operand 29136 states and 33075 transitions. Second operand has 3 states, 3 states have (on average 97.66666666666667) internal successors, (293), 3 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) [2023-12-15 18:17:09,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 18:17:09,121 INFO L93 Difference]: Finished difference Result 55807 states and 63195 transitions. [2023-12-15 18:17:09,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-15 18:17:09,122 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 97.66666666666667) internal successors, (293), 3 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 298 [2023-12-15 18:17:09,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 18:17:09,162 INFO L225 Difference]: With dead ends: 55807 [2023-12-15 18:17:09,163 INFO L226 Difference]: Without dead ends: 26672 [2023-12-15 18:17:09,187 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 297 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-15 18:17:09,188 INFO L413 NwaCegarLoop]: 295 mSDtfsCounter, 200 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 503 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-15 18:17:09,188 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [200 Valid, 309 Invalid, 592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 503 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-15 18:17:09,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26672 states. [2023-12-15 18:17:09,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26672 to 25654. [2023-12-15 18:17:09,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25654 states, 25653 states have (on average 1.1062643745370913) internal successors, (28379), 25653 states have internal predecessors, (28379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 18:17:09,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25654 states to 25654 states and 28379 transitions. [2023-12-15 18:17:09,532 INFO L78 Accepts]: Start accepts. Automaton has 25654 states and 28379 transitions. Word has length 298 [2023-12-15 18:17:09,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 18:17:09,533 INFO L495 AbstractCegarLoop]: Abstraction has 25654 states and 28379 transitions. [2023-12-15 18:17:09,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 97.66666666666667) internal successors, (293), 3 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) [2023-12-15 18:17:09,533 INFO L276 IsEmpty]: Start isEmpty. Operand 25654 states and 28379 transitions. [2023-12-15 18:17:09,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2023-12-15 18:17:09,560 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 18:17:09,560 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 18:17:09,571 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-12-15 18:17:09,766 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,SelfDestructingSolverStorable13 [2023-12-15 18:17:09,767 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 18:17:09,767 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 18:17:09,767 INFO L85 PathProgramCache]: Analyzing trace with hash -1980372537, now seen corresponding path program 1 times [2023-12-15 18:17:09,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 18:17:09,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545538263] [2023-12-15 18:17:09,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 18:17:09,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 18:17:09,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:17:10,979 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 146 proven. 6 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2023-12-15 18:17:10,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 18:17:10,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545538263] [2023-12-15 18:17:10,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545538263] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 18:17:10,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341276731] [2023-12-15 18:17:10,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 18:17:10,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 18:17:10,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 18:17:10,981 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) [2023-12-15 18:17:10,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-15 18:17:11,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:17:11,162 INFO L262 TraceCheckSpWp]: Trace formula consists of 586 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-15 18:17:11,167 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 18:17:11,202 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 192 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-12-15 18:17:11,203 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-15 18:17:11,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341276731] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 18:17:11,203 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-15 18:17:11,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2023-12-15 18:17:11,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563564036] [2023-12-15 18:17:11,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 18:17:11,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-15 18:17:11,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 18:17:11,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-15 18:17:11,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-15 18:17:11,205 INFO L87 Difference]: Start difference. First operand 25654 states and 28379 transitions. Second operand has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 3 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 18:17:11,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 18:17:11,825 INFO L93 Difference]: Finished difference Result 61477 states and 68202 transitions. [2023-12-15 18:17:11,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-15 18:17:11,825 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 3 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 313 [2023-12-15 18:17:11,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 18:17:11,865 INFO L225 Difference]: With dead ends: 61477 [2023-12-15 18:17:11,865 INFO L226 Difference]: Without dead ends: 35824 [2023-12-15 18:17:11,888 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 312 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-15 18:17:11,888 INFO L413 NwaCegarLoop]: 289 mSDtfsCounter, 204 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-15 18:17:11,888 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [204 Valid, 313 Invalid, 605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 489 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-15 18:17:11,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35824 states. [2023-12-15 18:17:12,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35824 to 34789. [2023-12-15 18:17:12,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34789 states, 34788 states have (on average 1.108370702541106) internal successors, (38558), 34788 states have internal predecessors, (38558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 18:17:12,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34789 states to 34789 states and 38558 transitions. [2023-12-15 18:17:12,430 INFO L78 Accepts]: Start accepts. Automaton has 34789 states and 38558 transitions. Word has length 313 [2023-12-15 18:17:12,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 18:17:12,430 INFO L495 AbstractCegarLoop]: Abstraction has 34789 states and 38558 transitions. [2023-12-15 18:17:12,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 3 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 18:17:12,430 INFO L276 IsEmpty]: Start isEmpty. Operand 34789 states and 38558 transitions. [2023-12-15 18:17:12,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2023-12-15 18:17:12,464 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 18:17:12,464 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-12-15 18:17:12,470 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-12-15 18:17:12,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-12-15 18:17:12,666 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 18:17:12,666 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 18:17:12,667 INFO L85 PathProgramCache]: Analyzing trace with hash 1760540483, now seen corresponding path program 1 times [2023-12-15 18:17:12,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 18:17:12,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895853825] [2023-12-15 18:17:12,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 18:17:12,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 18:17:12,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:17:13,208 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 94 proven. 6 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2023-12-15 18:17:13,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 18:17:13,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895853825] [2023-12-15 18:17:13,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895853825] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 18:17:13,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418651880] [2023-12-15 18:17:13,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 18:17:13,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 18:17:13,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 18:17:13,210 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) [2023-12-15 18:17:13,228 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-15 18:17:13,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:17:13,402 INFO L262 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-15 18:17:13,407 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 18:17:13,538 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 100 proven. 0 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2023-12-15 18:17:13,539 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-15 18:17:13,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418651880] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 18:17:13,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-15 18:17:13,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-12-15 18:17:13,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105739574] [2023-12-15 18:17:13,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 18:17:13,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-15 18:17:13,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 18:17:13,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-15 18:17:13,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-12-15 18:17:13,541 INFO L87 Difference]: Start difference. First operand 34789 states and 38558 transitions. Second operand has 4 states, 4 states have (on average 56.25) 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) [2023-12-15 18:17:14,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 18:17:14,442 INFO L93 Difference]: Finished difference Result 72424 states and 80131 transitions. [2023-12-15 18:17:14,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-15 18:17:14,443 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 56.25) 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 332 [2023-12-15 18:17:14,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 18:17:14,482 INFO L225 Difference]: With dead ends: 72424 [2023-12-15 18:17:14,482 INFO L226 Difference]: Without dead ends: 37636 [2023-12-15 18:17:14,506 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 330 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-12-15 18:17:14,506 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 554 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 716 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 554 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 815 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 716 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-15 18:17:14,506 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [554 Valid, 116 Invalid, 815 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 716 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-15 18:17:14,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37636 states. [2023-12-15 18:17:14,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37636 to 35601. [2023-12-15 18:17:14,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35601 states, 35600 states have (on average 1.1034550561797754) internal successors, (39283), 35600 states have internal predecessors, (39283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 18:17:15,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35601 states to 35601 states and 39283 transitions. [2023-12-15 18:17:15,032 INFO L78 Accepts]: Start accepts. Automaton has 35601 states and 39283 transitions. Word has length 332 [2023-12-15 18:17:15,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 18:17:15,033 INFO L495 AbstractCegarLoop]: Abstraction has 35601 states and 39283 transitions. [2023-12-15 18:17:15,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 56.25) 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) [2023-12-15 18:17:15,033 INFO L276 IsEmpty]: Start isEmpty. Operand 35601 states and 39283 transitions. [2023-12-15 18:17:15,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 361 [2023-12-15 18:17:15,071 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 18:17:15,071 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 18:17:15,080 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-12-15 18:17:15,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 18:17:15,281 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 18:17:15,281 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 18:17:15,281 INFO L85 PathProgramCache]: Analyzing trace with hash -1510283991, now seen corresponding path program 1 times [2023-12-15 18:17:15,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 18:17:15,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076718168] [2023-12-15 18:17:15,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 18:17:15,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 18:17:15,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:17:15,791 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 102 proven. 6 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2023-12-15 18:17:15,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 18:17:15,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076718168] [2023-12-15 18:17:15,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076718168] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 18:17:15,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256887066] [2023-12-15 18:17:15,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 18:17:15,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 18:17:15,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 18:17:15,793 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) [2023-12-15 18:17:15,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-15 18:17:15,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:17:15,968 INFO L262 TraceCheckSpWp]: Trace formula consists of 630 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-15 18:17:15,973 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 18:17:16,066 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 108 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2023-12-15 18:17:16,066 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-15 18:17:16,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256887066] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 18:17:16,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-15 18:17:16,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-12-15 18:17:16,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4775415] [2023-12-15 18:17:16,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 18:17:16,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-15 18:17:16,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 18:17:16,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-15 18:17:16,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-12-15 18:17:16,068 INFO L87 Difference]: Start difference. First operand 35601 states and 39283 transitions. Second operand has 4 states, 4 states have (on average 53.25) internal successors, (213), 3 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 18:17:16,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 18:17:16,971 INFO L93 Difference]: Finished difference Result 96813 states and 106726 transitions. [2023-12-15 18:17:16,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-15 18:17:16,972 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 53.25) internal successors, (213), 3 states have internal predecessors, (213), 0 states have call successors, (0), 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 360 [2023-12-15 18:17:16,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 18:17:17,043 INFO L225 Difference]: With dead ends: 96813 [2023-12-15 18:17:17,043 INFO L226 Difference]: Without dead ends: 61213 [2023-12-15 18:17:17,075 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 358 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-12-15 18:17:17,075 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 492 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 653 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 492 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 722 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 653 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-15 18:17:17,075 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [492 Valid, 291 Invalid, 722 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 653 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-15 18:17:17,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61213 states. [2023-12-15 18:17:17,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61213 to 57959. [2023-12-15 18:17:17,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57959 states, 57958 states have (on average 1.1028503399013079) internal successors, (63919), 57958 states have internal predecessors, (63919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 18:17:17,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57959 states to 57959 states and 63919 transitions. [2023-12-15 18:17:17,962 INFO L78 Accepts]: Start accepts. Automaton has 57959 states and 63919 transitions. Word has length 360 [2023-12-15 18:17:17,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 18:17:17,963 INFO L495 AbstractCegarLoop]: Abstraction has 57959 states and 63919 transitions. [2023-12-15 18:17:17,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 53.25) internal successors, (213), 3 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 18:17:17,963 INFO L276 IsEmpty]: Start isEmpty. Operand 57959 states and 63919 transitions. [2023-12-15 18:17:18,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 364 [2023-12-15 18:17:18,013 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 18:17:18,014 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 18:17:18,020 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-12-15 18:17:18,220 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,SelfDestructingSolverStorable16 [2023-12-15 18:17:18,220 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 18:17:18,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 18:17:18,221 INFO L85 PathProgramCache]: Analyzing trace with hash -1715098698, now seen corresponding path program 1 times [2023-12-15 18:17:18,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 18:17:18,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265732899] [2023-12-15 18:17:18,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 18:17:18,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 18:17:18,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:17:18,728 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 111 proven. 6 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2023-12-15 18:17:18,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 18:17:18,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265732899] [2023-12-15 18:17:18,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265732899] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 18:17:18,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114856422] [2023-12-15 18:17:18,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 18:17:18,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 18:17:18,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 18:17:18,731 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) [2023-12-15 18:17:18,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-15 18:17:18,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:17:18,898 INFO L262 TraceCheckSpWp]: Trace formula consists of 641 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-15 18:17:18,901 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 18:17:18,993 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 117 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2023-12-15 18:17:18,993 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-15 18:17:18,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114856422] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 18:17:18,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-15 18:17:18,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-12-15 18:17:18,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911983057] [2023-12-15 18:17:18,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 18:17:18,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-15 18:17:18,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 18:17:18,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-15 18:17:18,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-12-15 18:17:18,995 INFO L87 Difference]: Start difference. First operand 57959 states and 63919 transitions. Second operand has 4 states, 4 states have (on average 54.0) internal successors, (216), 3 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 18:17:20,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 18:17:20,045 INFO L93 Difference]: Finished difference Result 156602 states and 172875 transitions. [2023-12-15 18:17:20,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-15 18:17:20,046 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 54.0) internal successors, (216), 3 states have internal predecessors, (216), 0 states have call successors, (0), 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 363 [2023-12-15 18:17:20,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 18:17:20,166 INFO L225 Difference]: With dead ends: 156602 [2023-12-15 18:17:20,166 INFO L226 Difference]: Without dead ends: 98644 [2023-12-15 18:17:20,213 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 365 GetRequests, 361 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-12-15 18:17:20,214 INFO L413 NwaCegarLoop]: 226 mSDtfsCounter, 459 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 779 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 459 SdHoareTripleChecker+Valid, 446 SdHoareTripleChecker+Invalid, 851 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 779 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-15 18:17:20,214 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [459 Valid, 446 Invalid, 851 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 779 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-15 18:17:20,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98644 states. [2023-12-15 18:17:21,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98644 to 98020. [2023-12-15 18:17:21,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98020 states, 98019 states have (on average 1.1025719503361593) internal successors, (108073), 98019 states have internal predecessors, (108073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 18:17:21,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98020 states to 98020 states and 108073 transitions. [2023-12-15 18:17:21,802 INFO L78 Accepts]: Start accepts. Automaton has 98020 states and 108073 transitions. Word has length 363 [2023-12-15 18:17:21,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 18:17:21,802 INFO L495 AbstractCegarLoop]: Abstraction has 98020 states and 108073 transitions. [2023-12-15 18:17:21,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 54.0) internal successors, (216), 3 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 18:17:21,802 INFO L276 IsEmpty]: Start isEmpty. Operand 98020 states and 108073 transitions. [2023-12-15 18:17:21,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 366 [2023-12-15 18:17:21,843 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 18:17:21,843 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 18:17:21,849 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-12-15 18:17:22,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-12-15 18:17:22,045 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 18:17:22,045 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 18:17:22,045 INFO L85 PathProgramCache]: Analyzing trace with hash 1751482075, now seen corresponding path program 1 times [2023-12-15 18:17:22,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 18:17:22,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967067397] [2023-12-15 18:17:22,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 18:17:22,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 18:17:22,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:17:23,791 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 221 proven. 58 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-12-15 18:17:23,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 18:17:23,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967067397] [2023-12-15 18:17:23,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967067397] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 18:17:23,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275238072] [2023-12-15 18:17:23,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 18:17:23,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 18:17:23,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 18:17:23,793 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) [2023-12-15 18:17:23,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-15 18:17:23,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:17:23,994 INFO L262 TraceCheckSpWp]: Trace formula consists of 602 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-15 18:17:23,998 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 18:17:24,250 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 279 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-12-15 18:17:24,250 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-15 18:17:24,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275238072] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 18:17:24,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-15 18:17:24,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2023-12-15 18:17:24,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933347060] [2023-12-15 18:17:24,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 18:17:24,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-15 18:17:24,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 18:17:24,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-15 18:17:24,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-12-15 18:17:24,252 INFO L87 Difference]: Start difference. First operand 98020 states and 108073 transitions. Second operand has 4 states, 4 states have (on average 83.0) internal successors, (332), 3 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 18:17:25,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 18:17:25,480 INFO L93 Difference]: Finished difference Result 198314 states and 218535 transitions. [2023-12-15 18:17:25,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-15 18:17:25,480 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 83.0) internal successors, (332), 3 states have internal predecessors, (332), 0 states have call successors, (0), 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 365 [2023-12-15 18:17:25,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 18:17:25,595 INFO L225 Difference]: With dead ends: 198314 [2023-12-15 18:17:25,596 INFO L226 Difference]: Without dead ends: 100295 [2023-12-15 18:17:25,650 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 369 GetRequests, 363 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-12-15 18:17:25,651 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 417 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 819 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 417 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 962 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 819 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-15 18:17:25,651 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [417 Valid, 77 Invalid, 962 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 819 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-12-15 18:17:25,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100295 states. [2023-12-15 18:17:26,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100295 to 99029. [2023-12-15 18:17:27,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99029 states, 99028 states have (on average 1.0827947651169367) internal successors, (107227), 99028 states have internal predecessors, (107227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 18:17:27,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99029 states to 99029 states and 107227 transitions. [2023-12-15 18:17:27,193 INFO L78 Accepts]: Start accepts. Automaton has 99029 states and 107227 transitions. Word has length 365 [2023-12-15 18:17:27,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 18:17:27,194 INFO L495 AbstractCegarLoop]: Abstraction has 99029 states and 107227 transitions. [2023-12-15 18:17:27,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 83.0) internal successors, (332), 3 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 18:17:27,194 INFO L276 IsEmpty]: Start isEmpty. Operand 99029 states and 107227 transitions. [2023-12-15 18:17:27,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 393 [2023-12-15 18:17:27,447 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 18:17:27,447 INFO L195 NwaCegarLoop]: trace histogram [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, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 18:17:27,476 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-12-15 18:17:27,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 18:17:27,674 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 18:17:27,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 18:17:27,674 INFO L85 PathProgramCache]: Analyzing trace with hash 448784164, now seen corresponding path program 1 times [2023-12-15 18:17:27,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 18:17:27,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727730726] [2023-12-15 18:17:27,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 18:17:27,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 18:17:27,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:17:28,510 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 179 proven. 0 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2023-12-15 18:17:28,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 18:17:28,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727730726] [2023-12-15 18:17:28,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727730726] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 18:17:28,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 18:17:28,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-15 18:17:28,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212160325] [2023-12-15 18:17:28,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 18:17:28,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-15 18:17:28,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 18:17:28,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-15 18:17:28,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-15 18:17:28,513 INFO L87 Difference]: Start difference. First operand 99029 states and 107227 transitions. Second operand has 3 states, 3 states have (on average 84.0) internal successors, (252), 2 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 18:17:29,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 18:17:29,533 INFO L93 Difference]: Finished difference Result 200699 states and 217207 transitions. [2023-12-15 18:17:29,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-15 18:17:29,534 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 84.0) internal successors, (252), 2 states have internal predecessors, (252), 0 states have call successors, (0), 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 392 [2023-12-15 18:17:29,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 18:17:29,654 INFO L225 Difference]: With dead ends: 200699 [2023-12-15 18:17:29,655 INFO L226 Difference]: Without dead ends: 101671 [2023-12-15 18:17:29,710 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 [2023-12-15 18:17:29,711 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 134 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 529 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-15 18:17:29,711 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 126 Invalid, 539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 529 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-15 18:17:29,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101671 states. [2023-12-15 18:17:31,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101671 to 101668. [2023-12-15 18:17:31,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101668 states, 101667 states have (on average 1.0815800603932446) internal successors, (109961), 101667 states have internal predecessors, (109961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 18:17:31,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101668 states to 101668 states and 109961 transitions. [2023-12-15 18:17:31,393 INFO L78 Accepts]: Start accepts. Automaton has 101668 states and 109961 transitions. Word has length 392 [2023-12-15 18:17:31,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 18:17:31,393 INFO L495 AbstractCegarLoop]: Abstraction has 101668 states and 109961 transitions. [2023-12-15 18:17:31,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 84.0) internal successors, (252), 2 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 18:17:31,393 INFO L276 IsEmpty]: Start isEmpty. Operand 101668 states and 109961 transitions. [2023-12-15 18:17:31,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 393 [2023-12-15 18:17:31,441 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 18:17:31,441 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-12-15 18:17:31,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-12-15 18:17:31,441 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 18:17:31,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 18:17:31,441 INFO L85 PathProgramCache]: Analyzing trace with hash -436080176, now seen corresponding path program 1 times [2023-12-15 18:17:31,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 18:17:31,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868615311] [2023-12-15 18:17:31,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 18:17:31,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 18:17:31,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:17:31,641 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 293 proven. 0 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2023-12-15 18:17:31,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 18:17:31,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868615311] [2023-12-15 18:17:31,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868615311] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 18:17:31,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 18:17:31,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-15 18:17:31,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649188779] [2023-12-15 18:17:31,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 18:17:31,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-15 18:17:31,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 18:17:31,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-15 18:17:31,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-15 18:17:31,644 INFO L87 Difference]: Start difference. First operand 101668 states and 109961 transitions. Second operand has 3 states, 3 states have (on average 100.33333333333333) internal successors, (301), 3 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 18:17:33,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 18:17:33,024 INFO L93 Difference]: Finished difference Result 196830 states and 212899 transitions. [2023-12-15 18:17:33,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-15 18:17:33,025 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 100.33333333333333) internal successors, (301), 3 states have internal predecessors, (301), 0 states have call successors, (0), 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 392 [2023-12-15 18:17:33,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 18:17:33,151 INFO L225 Difference]: With dead ends: 196830 [2023-12-15 18:17:33,151 INFO L226 Difference]: Without dead ends: 95975 [2023-12-15 18:17:33,205 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 [2023-12-15 18:17:33,205 INFO L413 NwaCegarLoop]: 275 mSDtfsCounter, 212 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-15 18:17:33,206 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [212 Valid, 289 Invalid, 581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 512 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-15 18:17:33,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95975 states. [2023-12-15 18:17:34,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95975 to 90079. [2023-12-15 18:17:34,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90079 states, 90078 states have (on average 1.0674082461866383) internal successors, (96150), 90078 states have internal predecessors, (96150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 18:17:34,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90079 states to 90079 states and 96150 transitions. [2023-12-15 18:17:34,466 INFO L78 Accepts]: Start accepts. Automaton has 90079 states and 96150 transitions. Word has length 392 [2023-12-15 18:17:34,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 18:17:34,466 INFO L495 AbstractCegarLoop]: Abstraction has 90079 states and 96150 transitions. [2023-12-15 18:17:34,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 100.33333333333333) internal successors, (301), 3 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 18:17:34,466 INFO L276 IsEmpty]: Start isEmpty. Operand 90079 states and 96150 transitions. [2023-12-15 18:17:34,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 398 [2023-12-15 18:17:34,723 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 18:17:34,723 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-12-15 18:17:34,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-12-15 18:17:34,724 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 18:17:34,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 18:17:34,724 INFO L85 PathProgramCache]: Analyzing trace with hash 1800602335, now seen corresponding path program 1 times [2023-12-15 18:17:34,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 18:17:34,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43139882] [2023-12-15 18:17:34,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 18:17:34,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 18:17:34,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:17:35,066 INFO L134 CoverageAnalysis]: Checked inductivity of 446 backedges. 163 proven. 0 refuted. 0 times theorem prover too weak. 283 trivial. 0 not checked. [2023-12-15 18:17:35,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 18:17:35,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43139882] [2023-12-15 18:17:35,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43139882] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 18:17:35,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 18:17:35,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-15 18:17:35,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28159207] [2023-12-15 18:17:35,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 18:17:35,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-15 18:17:35,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 18:17:35,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-15 18:17:35,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-15 18:17:35,069 INFO L87 Difference]: Start difference. First operand 90079 states and 96150 transitions. Second operand has 4 states, 4 states have (on average 55.0) internal successors, (220), 3 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2023-12-15 18:17:35,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-15 18:17:35,186 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 [2023-12-15 18:17:35,187 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 171 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-15 18:17:35,187 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 6 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-15 18:17:35,188 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-15 18:17:35,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-12-15 18:17:35,189 WARN L619 AbstractCegarLoop]: Verification canceled: while NwaCegarLoop was constructing difference of abstraction (90079states) and FLOYD_HOARE automaton (currently 4 states, 4 states before enhancement),while ReachableStatesComputation was computing reachable states (637 states constructed, input type IntersectNwa). [2023-12-15 18:17:35,192 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 18:17:35,194 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-12-15 18:17:35,195 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.12 06:17:35 BoogieIcfgContainer [2023-12-15 18:17:35,195 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-15 18:17:35,196 INFO L158 Benchmark]: Toolchain (without parser) took 50814.82ms. Allocated memory was 184.5MB in the beginning and 6.8GB in the end (delta: 6.7GB). Free memory was 113.4MB in the beginning and 4.6GB in the end (delta: -4.5GB). Peak memory consumption was 2.1GB. Max. memory is 8.0GB. [2023-12-15 18:17:35,196 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 184.5MB. Free memory was 134.5MB in the beginning and 134.4MB in the end (delta: 142.7kB). There was no memory consumed. Max. memory is 8.0GB. [2023-12-15 18:17:35,196 INFO L158 Benchmark]: CACSL2BoogieTranslator took 815.90ms. Allocated memory was 184.5MB in the beginning and 271.6MB in the end (delta: 87.0MB). Free memory was 113.2MB in the beginning and 188.9MB in the end (delta: -75.7MB). Peak memory consumption was 18.6MB. Max. memory is 8.0GB. [2023-12-15 18:17:35,197 INFO L158 Benchmark]: Boogie Procedure Inliner took 138.54ms. Allocated memory is still 271.6MB. Free memory was 188.9MB in the beginning and 173.7MB in the end (delta: 15.2MB). Peak memory consumption was 14.7MB. Max. memory is 8.0GB. [2023-12-15 18:17:35,197 INFO L158 Benchmark]: Boogie Preprocessor took 159.40ms. Allocated memory is still 271.6MB. Free memory was 173.7MB in the beginning and 161.2MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2023-12-15 18:17:35,197 INFO L158 Benchmark]: RCFGBuilder took 1814.81ms. Allocated memory was 271.6MB in the beginning and 359.7MB in the end (delta: 88.1MB). Free memory was 161.2MB in the beginning and 293.2MB in the end (delta: -132.0MB). Peak memory consumption was 70.3MB. Max. memory is 8.0GB. [2023-12-15 18:17:35,197 INFO L158 Benchmark]: TraceAbstraction took 47879.72ms. Allocated memory was 359.7MB in the beginning and 6.8GB in the end (delta: 6.5GB). Free memory was 292.1MB in the beginning and 4.6GB in the end (delta: -4.4GB). Peak memory consumption was 2.1GB. Max. memory is 8.0GB. [2023-12-15 18:17:35,198 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 184.5MB. Free memory was 134.5MB in the beginning and 134.4MB in the end (delta: 142.7kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 815.90ms. Allocated memory was 184.5MB in the beginning and 271.6MB in the end (delta: 87.0MB). Free memory was 113.2MB in the beginning and 188.9MB in the end (delta: -75.7MB). Peak memory consumption was 18.6MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 138.54ms. Allocated memory is still 271.6MB. Free memory was 188.9MB in the beginning and 173.7MB in the end (delta: 15.2MB). Peak memory consumption was 14.7MB. Max. memory is 8.0GB. * Boogie Preprocessor took 159.40ms. Allocated memory is still 271.6MB. Free memory was 173.7MB in the beginning and 161.2MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * RCFGBuilder took 1814.81ms. Allocated memory was 271.6MB in the beginning and 359.7MB in the end (delta: 88.1MB). Free memory was 161.2MB in the beginning and 293.2MB in the end (delta: -132.0MB). Peak memory consumption was 70.3MB. Max. memory is 8.0GB. * TraceAbstraction took 47879.72ms. Allocated memory was 359.7MB in the beginning and 6.8GB in the end (delta: 6.5GB). Free memory was 292.1MB in the beginning and 4.6GB in the end (delta: -4.4GB). Peak memory consumption was 2.1GB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 1576]: Timeout (TraceAbstraction) Unable to prove that a call to reach_error is unreachable (line 1576). Cancelled while NwaCegarLoop was constructing difference of abstraction (90079states) and FLOYD_HOARE automaton (currently 4 states, 4 states before enhancement),while ReachableStatesComputation was computing reachable states (637 states constructed, input type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 240 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 47.8s, OverallIterations: 22, TraceHistogramMax: 6, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.9s, AutomataDifference: 18.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 4858 SdHoareTripleChecker+Valid, 13.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 4858 mSDsluCounter, 4555 SdHoareTripleChecker+Invalid, 10.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 805 mSDsCounter, 1806 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 12611 IncrementalHoareTripleChecker+Invalid, 14417 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1806 mSolverCounterUnsat, 3750 mSDtfsCounter, 12611 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3032 GetRequests, 2979 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=101668occurred in iteration=20, InterpolantAutomatonStates: 68, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 10.2s AutomataMinimizationTime, 21 MinimizatonAttempts, 18474 StatesRemovedByMinimization, 19 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.9s SsaConstructionTime, 1.4s SatisfiabilityAnalysisTime, 12.4s InterpolantComputationTime, 8934 NumberOfCodeBlocks, 8934 NumberOfCodeBlocksAsserted, 32 NumberOfCheckSat, 8902 ConstructedInterpolants, 0 QuantifiedInterpolants, 32461 SizeOfPredicates, 0 NumberOfNonLiveVariables, 5370 ConjunctsInSsa, 30 ConjunctsInUnsatCore, 32 InterpolantComputations, 22 PerfectInterpolantSequences, 5011/5123 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown