./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/array-patterns/array13_pattern.c --full-output --preprocessor.use.memory.slicer false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6ae2ee47 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/array-patterns/array13_pattern.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 78699f7813351c3df7f7fcab3bf98fffd7a92c5cc679034a9d139e9169232d7e --preprocessor.use.memory.slicer false --- Real Ultimate output --- This is Ultimate 0.2.3-dev-6ae2ee4-m [2023-11-23 00:01:44,667 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 00:01:44,723 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-23 00:01:44,728 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 00:01:44,729 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 00:01:44,753 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 00:01:44,755 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 00:01:44,756 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 00:01:44,756 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-23 00:01:44,759 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-23 00:01:44,759 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 00:01:44,759 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 00:01:44,760 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-23 00:01:44,761 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-23 00:01:44,761 INFO L153 SettingsManager]: * Use SBE=true [2023-11-23 00:01:44,761 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 00:01:44,761 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 00:01:44,762 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 00:01:44,762 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 00:01:44,762 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 00:01:44,762 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 00:01:44,762 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 00:01:44,763 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 00:01:44,764 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 00:01:44,764 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 00:01:44,764 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 00:01:44,764 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 00:01:44,765 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 00:01:44,765 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-23 00:01:44,765 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 00:01:44,766 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 00:01:44,766 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 00:01:44,766 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 00:01:44,766 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 00:01:44,766 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 00:01:44,766 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-23 00:01:44,767 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 00:01:44,767 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 00:01:44,767 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-23 00:01:44,767 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 00:01:44,767 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-23 00:01:44,767 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 00:01:44,768 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 78699f7813351c3df7f7fcab3bf98fffd7a92c5cc679034a9d139e9169232d7e Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.preprocessor: Use memory slicer -> false [2023-11-23 00:01:44,957 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 00:01:44,972 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 00:01:44,974 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 00:01:44,975 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 00:01:44,975 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 00:01:44,976 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-patterns/array13_pattern.c [2023-11-23 00:01:45,959 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 00:01:46,110 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 00:01:46,111 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-patterns/array13_pattern.c [2023-11-23 00:01:46,118 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0c3c07e0b/1870a1ae26fb4c24bb64723f383ffd6d/FLAGa2928e6fe [2023-11-23 00:01:46,144 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0c3c07e0b/1870a1ae26fb4c24bb64723f383ffd6d [2023-11-23 00:01:46,147 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 00:01:46,148 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 00:01:46,149 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 00:01:46,150 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 00:01:46,153 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 00:01:46,154 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 12:01:46" (1/1) ... [2023-11-23 00:01:46,155 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e94f321 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:01:46, skipping insertion in model container [2023-11-23 00:01:46,155 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 12:01:46" (1/1) ... [2023-11-23 00:01:46,177 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 00:01:46,348 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-patterns/array13_pattern.c[1342,1355] [2023-11-23 00:01:46,374 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 00:01:46,381 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 00:01:46,390 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-patterns/array13_pattern.c[1342,1355] [2023-11-23 00:01:46,396 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 00:01:46,406 INFO L206 MainTranslator]: Completed translation [2023-11-23 00:01:46,406 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:01:46 WrapperNode [2023-11-23 00:01:46,407 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 00:01:46,407 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 00:01:46,408 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 00:01:46,408 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 00:01:46,413 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:01:46" (1/1) ... [2023-11-23 00:01:46,418 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:01:46" (1/1) ... [2023-11-23 00:01:46,440 INFO L138 Inliner]: procedures = 16, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 98 [2023-11-23 00:01:46,440 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 00:01:46,441 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 00:01:46,441 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 00:01:46,442 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 00:01:46,448 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:01:46" (1/1) ... [2023-11-23 00:01:46,449 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:01:46" (1/1) ... [2023-11-23 00:01:46,457 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:01:46" (1/1) ... [2023-11-23 00:01:46,457 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:01:46" (1/1) ... [2023-11-23 00:01:46,460 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:01:46" (1/1) ... [2023-11-23 00:01:46,469 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:01:46" (1/1) ... [2023-11-23 00:01:46,474 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:01:46" (1/1) ... [2023-11-23 00:01:46,477 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:01:46" (1/1) ... [2023-11-23 00:01:46,479 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 00:01:46,481 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 00:01:46,481 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 00:01:46,481 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 00:01:46,482 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:01:46" (1/1) ... [2023-11-23 00:01:46,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 00:01:46,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 00:01:46,546 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 00:01:46,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 00:01:46,590 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 00:01:46,590 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-23 00:01:46,591 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-23 00:01:46,591 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 00:01:46,591 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 00:01:46,591 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-23 00:01:46,591 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 00:01:46,591 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 00:01:46,591 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-23 00:01:46,593 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 00:01:46,644 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 00:01:46,646 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 00:01:46,799 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 00:01:46,827 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 00:01:46,827 INFO L309 CfgBuilder]: Removed 5 assume(true) statements. [2023-11-23 00:01:46,828 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 12:01:46 BoogieIcfgContainer [2023-11-23 00:01:46,828 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 00:01:46,829 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 00:01:46,830 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 00:01:46,832 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 00:01:46,832 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 12:01:46" (1/3) ... [2023-11-23 00:01:46,833 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fa9d0d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 12:01:46, skipping insertion in model container [2023-11-23 00:01:46,833 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:01:46" (2/3) ... [2023-11-23 00:01:46,833 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fa9d0d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 12:01:46, skipping insertion in model container [2023-11-23 00:01:46,833 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 12:01:46" (3/3) ... [2023-11-23 00:01:46,834 INFO L112 eAbstractionObserver]: Analyzing ICFG array13_pattern.c [2023-11-23 00:01:46,848 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 00:01:46,848 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 00:01:46,882 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 00:01:46,887 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;@6056ef90, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 00:01:46,887 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 00:01:46,890 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 20 states have (on average 1.75) internal successors, (35), 21 states have internal predecessors, (35), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-23 00:01:46,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-23 00:01:46,896 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 00:01:46,896 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 00:01:46,897 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 00:01:46,900 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 00:01:46,901 INFO L85 PathProgramCache]: Analyzing trace with hash -1700327762, now seen corresponding path program 1 times [2023-11-23 00:01:46,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 00:01:46,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628718954] [2023-11-23 00:01:46,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 00:01:46,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 00:01:46,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 00:01:47,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 00:01:47,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628718954] [2023-11-23 00:01:47,020 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-23 00:01:47,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427403426] [2023-11-23 00:01:47,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 00:01:47,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 00:01:47,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 00:01:47,025 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) [2023-11-23 00:01:47,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 00:01:47,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 00:01:47,098 INFO L262 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-23 00:01:47,104 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 00:01:47,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 00:01:47,124 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 00:01:47,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427403426] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 00:01:47,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 00:01:47,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 00:01:47,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064419780] [2023-11-23 00:01:47,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 00:01:47,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-23 00:01:47,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 00:01:47,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-23 00:01:47,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-23 00:01:47,156 INFO L87 Difference]: Start difference. First operand has 26 states, 20 states have (on average 1.75) internal successors, (35), 21 states have internal predecessors, (35), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 00:01:47,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 00:01:47,184 INFO L93 Difference]: Finished difference Result 50 states and 82 transitions. [2023-11-23 00:01:47,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-23 00:01:47,186 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2023-11-23 00:01:47,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 00:01:47,191 INFO L225 Difference]: With dead ends: 50 [2023-11-23 00:01:47,191 INFO L226 Difference]: Without dead ends: 24 [2023-11-23 00:01:47,194 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-23 00:01:47,198 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 00:01:47,200 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 29 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 00:01:47,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-11-23 00:01:47,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-11-23 00:01:47,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 19 states have internal predecessors, (25), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-23 00:01:47,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 31 transitions. [2023-11-23 00:01:47,230 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 31 transitions. Word has length 14 [2023-11-23 00:01:47,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 00:01:47,231 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 31 transitions. [2023-11-23 00:01:47,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 00:01:47,231 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 31 transitions. [2023-11-23 00:01:47,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-23 00:01:47,232 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 00:01:47,233 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 00:01:47,247 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-23 00:01:47,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-23 00:01:47,448 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 00:01:47,450 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 00:01:47,450 INFO L85 PathProgramCache]: Analyzing trace with hash -1347272957, now seen corresponding path program 1 times [2023-11-23 00:01:47,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 00:01:47,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960795805] [2023-11-23 00:01:47,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 00:01:47,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 00:01:47,464 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 00:01:47,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [341143218] [2023-11-23 00:01:47,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 00:01:47,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 00:01:47,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 00:01:47,466 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) [2023-11-23 00:01:47,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 00:01:47,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 00:01:47,515 INFO L262 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-23 00:01:47,517 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 00:01:47,601 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 00:01:47,602 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 00:01:47,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 00:01:47,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960795805] [2023-11-23 00:01:47,612 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 00:01:47,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341143218] [2023-11-23 00:01:47,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341143218] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 00:01:47,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 00:01:47,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-23 00:01:47,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864814128] [2023-11-23 00:01:47,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 00:01:47,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 00:01:47,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 00:01:47,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 00:01:47,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-23 00:01:47,616 INFO L87 Difference]: Start difference. First operand 24 states and 31 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-23 00:01:47,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 00:01:47,751 INFO L93 Difference]: Finished difference Result 58 states and 72 transitions. [2023-11-23 00:01:47,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 00:01:47,752 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2023-11-23 00:01:47,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 00:01:47,753 INFO L225 Difference]: With dead ends: 58 [2023-11-23 00:01:47,754 INFO L226 Difference]: Without dead ends: 34 [2023-11-23 00:01:47,755 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-11-23 00:01:47,756 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 17 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 00:01:47,756 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 80 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 00:01:47,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-11-23 00:01:47,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 25. [2023-11-23 00:01:47,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.3) internal successors, (26), 20 states have internal predecessors, (26), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-23 00:01:47,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2023-11-23 00:01:47,761 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 27 [2023-11-23 00:01:47,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 00:01:47,762 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2023-11-23 00:01:47,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-23 00:01:47,762 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2023-11-23 00:01:47,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-23 00:01:47,763 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 00:01:47,763 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 00:01:47,777 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-23 00:01:47,964 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,SelfDestructingSolverStorable1 [2023-11-23 00:01:47,965 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 00:01:47,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 00:01:47,965 INFO L85 PathProgramCache]: Analyzing trace with hash -1762676017, now seen corresponding path program 1 times [2023-11-23 00:01:47,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 00:01:47,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708130246] [2023-11-23 00:01:47,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 00:01:47,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 00:01:47,975 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 00:01:47,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2125756623] [2023-11-23 00:01:47,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 00:01:47,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 00:01:47,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 00:01:47,977 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) [2023-11-23 00:01:47,986 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 00:01:48,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 00:01:48,028 INFO L262 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-23 00:01:48,029 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 00:01:48,057 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 00:01:48,058 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 00:01:48,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 00:01:48,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708130246] [2023-11-23 00:01:48,058 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 00:01:48,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125756623] [2023-11-23 00:01:48,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125756623] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 00:01:48,059 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 00:01:48,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 00:01:48,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647809213] [2023-11-23 00:01:48,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 00:01:48,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 00:01:48,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 00:01:48,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 00:01:48,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 00:01:48,061 INFO L87 Difference]: Start difference. First operand 25 states and 32 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-23 00:01:48,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 00:01:48,092 INFO L93 Difference]: Finished difference Result 48 states and 63 transitions. [2023-11-23 00:01:48,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 00:01:48,092 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2023-11-23 00:01:48,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 00:01:48,093 INFO L225 Difference]: With dead ends: 48 [2023-11-23 00:01:48,093 INFO L226 Difference]: Without dead ends: 27 [2023-11-23 00:01:48,093 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 00:01:48,094 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 19 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 00:01:48,095 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 42 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 00:01:48,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-11-23 00:01:48,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2023-11-23 00:01:48,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 22 states have internal predecessors, (28), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-23 00:01:48,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2023-11-23 00:01:48,099 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 30 [2023-11-23 00:01:48,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 00:01:48,099 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2023-11-23 00:01:48,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-23 00:01:48,099 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2023-11-23 00:01:48,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-23 00:01:48,104 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 00:01:48,104 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 00:01:48,117 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-23 00:01:48,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 00:01:48,312 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 00:01:48,313 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 00:01:48,313 INFO L85 PathProgramCache]: Analyzing trace with hash 1336204908, now seen corresponding path program 1 times [2023-11-23 00:01:48,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 00:01:48,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276174264] [2023-11-23 00:01:48,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 00:01:48,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 00:01:48,323 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 00:01:48,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1411357375] [2023-11-23 00:01:48,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 00:01:48,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 00:01:48,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 00:01:48,325 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) [2023-11-23 00:01:48,334 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-23 00:01:48,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 00:01:48,384 INFO L262 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-23 00:01:48,392 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 00:01:48,449 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-23 00:01:48,449 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 00:01:48,484 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-23 00:01:48,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 00:01:48,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276174264] [2023-11-23 00:01:48,485 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 00:01:48,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411357375] [2023-11-23 00:01:48,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411357375] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 00:01:48,485 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 00:01:48,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2023-11-23 00:01:48,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125425594] [2023-11-23 00:01:48,486 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 00:01:48,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 00:01:48,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 00:01:48,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 00:01:48,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-23 00:01:48,487 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-23 00:01:48,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 00:01:48,550 INFO L93 Difference]: Finished difference Result 39 states and 46 transitions. [2023-11-23 00:01:48,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 00:01:48,551 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 31 [2023-11-23 00:01:48,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 00:01:48,553 INFO L225 Difference]: With dead ends: 39 [2023-11-23 00:01:48,553 INFO L226 Difference]: Without dead ends: 35 [2023-11-23 00:01:48,554 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2023-11-23 00:01:48,559 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 38 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 00:01:48,560 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 56 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 00:01:48,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-11-23 00:01:48,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2023-11-23 00:01:48,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 26 states have internal predecessors, (32), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-23 00:01:48,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2023-11-23 00:01:48,571 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 31 [2023-11-23 00:01:48,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 00:01:48,572 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2023-11-23 00:01:48,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-23 00:01:48,572 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2023-11-23 00:01:48,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-23 00:01:48,573 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 00:01:48,574 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 00:01:48,587 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-23 00:01:48,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 00:01:48,784 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 00:01:48,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 00:01:48,785 INFO L85 PathProgramCache]: Analyzing trace with hash 1854339750, now seen corresponding path program 1 times [2023-11-23 00:01:48,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 00:01:48,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313971825] [2023-11-23 00:01:48,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 00:01:48,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 00:01:48,798 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 00:01:48,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1157537325] [2023-11-23 00:01:48,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 00:01:48,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 00:01:48,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 00:01:48,800 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) [2023-11-23 00:01:48,810 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-23 00:01:48,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 00:01:48,869 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-23 00:01:48,870 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 00:01:48,982 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 00:01:48,982 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 00:01:49,168 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-23 00:01:49,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 00:01:49,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313971825] [2023-11-23 00:01:49,169 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 00:01:49,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157537325] [2023-11-23 00:01:49,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157537325] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 00:01:49,170 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 00:01:49,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2023-11-23 00:01:49,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540519382] [2023-11-23 00:01:49,170 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 00:01:49,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-23 00:01:49,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 00:01:49,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-23 00:01:49,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2023-11-23 00:01:49,172 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand has 18 states, 16 states have (on average 2.25) internal successors, (36), 13 states have internal predecessors, (36), 4 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2023-11-23 00:01:49,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 00:01:49,465 INFO L93 Difference]: Finished difference Result 114 states and 137 transitions. [2023-11-23 00:01:49,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-23 00:01:49,466 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.25) internal successors, (36), 13 states have internal predecessors, (36), 4 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 35 [2023-11-23 00:01:49,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 00:01:49,468 INFO L225 Difference]: With dead ends: 114 [2023-11-23 00:01:49,468 INFO L226 Difference]: Without dead ends: 94 [2023-11-23 00:01:49,469 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=183, Invalid=747, Unknown=0, NotChecked=0, Total=930 [2023-11-23 00:01:49,470 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 128 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 00:01:49,470 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 158 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 00:01:49,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2023-11-23 00:01:49,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 53. [2023-11-23 00:01:49,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 42 states have (on average 1.2380952380952381) internal successors, (52), 43 states have internal predecessors, (52), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-23 00:01:49,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 64 transitions. [2023-11-23 00:01:49,479 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 64 transitions. Word has length 35 [2023-11-23 00:01:49,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 00:01:49,480 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 64 transitions. [2023-11-23 00:01:49,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.25) internal successors, (36), 13 states have internal predecessors, (36), 4 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2023-11-23 00:01:49,480 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 64 transitions. [2023-11-23 00:01:49,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-23 00:01:49,481 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 00:01:49,481 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 00:01:49,495 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-23 00:01:49,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 00:01:49,693 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 00:01:49,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 00:01:49,694 INFO L85 PathProgramCache]: Analyzing trace with hash 2112505188, now seen corresponding path program 1 times [2023-11-23 00:01:49,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 00:01:49,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195454852] [2023-11-23 00:01:49,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 00:01:49,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 00:01:49,717 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 00:01:49,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [701199589] [2023-11-23 00:01:49,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 00:01:49,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 00:01:49,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 00:01:49,724 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) [2023-11-23 00:01:49,753 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-23 00:01:49,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 00:01:49,774 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-23 00:01:49,779 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 00:01:49,850 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-23 00:01:50,068 INFO L349 Elim1Store]: treesize reduction 31, result has 18.4 percent of original size [2023-11-23 00:01:50,069 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 24 [2023-11-23 00:01:50,139 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-23 00:01:50,165 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 00:01:50,166 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 00:01:51,362 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 28 [2023-11-23 00:01:51,366 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 46 [2023-11-23 00:01:51,581 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-23 00:01:51,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 00:01:51,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195454852] [2023-11-23 00:01:51,581 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 00:01:51,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701199589] [2023-11-23 00:01:51,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701199589] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 00:01:51,582 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 00:01:51,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 24 [2023-11-23 00:01:51,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490201152] [2023-11-23 00:01:51,582 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 00:01:51,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-23 00:01:51,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 00:01:51,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-23 00:01:51,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=450, Unknown=0, NotChecked=0, Total=552 [2023-11-23 00:01:51,583 INFO L87 Difference]: Start difference. First operand 53 states and 64 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-23 00:01:53,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 00:01:53,763 INFO L93 Difference]: Finished difference Result 119 states and 145 transitions. [2023-11-23 00:01:53,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-23 00:01:53,763 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 35 [2023-11-23 00:01:53,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 00:01:53,765 INFO L225 Difference]: With dead ends: 119 [2023-11-23 00:01:53,765 INFO L226 Difference]: Without dead ends: 113 [2023-11-23 00:01:53,766 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=422, Invalid=1930, Unknown=0, NotChecked=0, Total=2352 [2023-11-23 00:01:53,767 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 198 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 468 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-23 00:01:53,767 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [198 Valid, 178 Invalid, 529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 468 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-23 00:01:53,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2023-11-23 00:01:53,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 91. [2023-11-23 00:01:53,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 73 states have (on average 1.2465753424657535) internal successors, (91), 75 states have internal predecessors, (91), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (11), 9 states have call predecessors, (11), 11 states have call successors, (11) [2023-11-23 00:01:53,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 113 transitions. [2023-11-23 00:01:53,785 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 113 transitions. Word has length 35 [2023-11-23 00:01:53,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 00:01:53,786 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 113 transitions. [2023-11-23 00:01:53,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-23 00:01:53,786 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 113 transitions. [2023-11-23 00:01:53,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-11-23 00:01:53,787 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 00:01:53,787 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 00:01:53,799 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-23 00:01:53,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 00:01:53,993 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 00:01:53,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 00:01:53,993 INFO L85 PathProgramCache]: Analyzing trace with hash 1243752137, now seen corresponding path program 2 times [2023-11-23 00:01:53,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 00:01:53,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397336985] [2023-11-23 00:01:53,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 00:01:53,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 00:01:54,003 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 00:01:54,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1345915962] [2023-11-23 00:01:54,009 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-23 00:01:54,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 00:01:54,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 00:01:54,011 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) [2023-11-23 00:01:54,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-23 00:01:54,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-23 00:01:54,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 00:01:54,056 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-23 00:01:54,060 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 00:01:54,104 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 00:01:54,104 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 00:01:54,135 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-23 00:01:54,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 00:01:54,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397336985] [2023-11-23 00:01:54,136 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 00:01:54,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345915962] [2023-11-23 00:01:54,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345915962] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 00:01:54,137 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 00:01:54,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2023-11-23 00:01:54,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177167722] [2023-11-23 00:01:54,137 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 00:01:54,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-23 00:01:54,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 00:01:54,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-23 00:01:54,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-11-23 00:01:54,140 INFO L87 Difference]: Start difference. First operand 91 states and 113 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-23 00:01:54,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 00:01:54,263 INFO L93 Difference]: Finished difference Result 196 states and 242 transitions. [2023-11-23 00:01:54,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-23 00:01:54,263 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 36 [2023-11-23 00:01:54,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 00:01:54,265 INFO L225 Difference]: With dead ends: 196 [2023-11-23 00:01:54,265 INFO L226 Difference]: Without dead ends: 100 [2023-11-23 00:01:54,267 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 60 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2023-11-23 00:01:54,267 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 70 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 00:01:54,268 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 112 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 00:01:54,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2023-11-23 00:01:54,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 76. [2023-11-23 00:01:54,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 63 states have (on average 1.2222222222222223) internal successors, (77), 64 states have internal predecessors, (77), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-23 00:01:54,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 93 transitions. [2023-11-23 00:01:54,297 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 93 transitions. Word has length 36 [2023-11-23 00:01:54,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 00:01:54,297 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 93 transitions. [2023-11-23 00:01:54,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-23 00:01:54,297 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 93 transitions. [2023-11-23 00:01:54,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-11-23 00:01:54,298 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 00:01:54,298 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 00:01:54,309 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-23 00:01:54,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 00:01:54,498 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 00:01:54,499 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 00:01:54,499 INFO L85 PathProgramCache]: Analyzing trace with hash 1262324009, now seen corresponding path program 2 times [2023-11-23 00:01:54,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 00:01:54,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083588160] [2023-11-23 00:01:54,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 00:01:54,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 00:01:54,507 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 00:01:54,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1908309479] [2023-11-23 00:01:54,508 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-23 00:01:54,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 00:01:54,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 00:01:54,509 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) [2023-11-23 00:01:54,524 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-23 00:01:54,581 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-23 00:01:54,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 00:01:54,581 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-23 00:01:54,583 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 00:01:54,622 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-23 00:01:54,622 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 00:01:54,654 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-23 00:01:54,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 00:01:54,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083588160] [2023-11-23 00:01:54,654 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 00:01:54,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908309479] [2023-11-23 00:01:54,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908309479] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 00:01:54,655 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 00:01:54,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2023-11-23 00:01:54,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309673914] [2023-11-23 00:01:54,655 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 00:01:54,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-23 00:01:54,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 00:01:54,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-23 00:01:54,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-11-23 00:01:54,657 INFO L87 Difference]: Start difference. First operand 76 states and 93 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-23 00:01:54,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 00:01:54,797 INFO L93 Difference]: Finished difference Result 132 states and 169 transitions. [2023-11-23 00:01:54,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-23 00:01:54,797 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 36 [2023-11-23 00:01:54,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 00:01:54,798 INFO L225 Difference]: With dead ends: 132 [2023-11-23 00:01:54,798 INFO L226 Difference]: Without dead ends: 95 [2023-11-23 00:01:54,800 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2023-11-23 00:01:54,801 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 39 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 00:01:54,802 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 62 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 00:01:54,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2023-11-23 00:01:54,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 84. [2023-11-23 00:01:54,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 71 states have (on average 1.2394366197183098) internal successors, (88), 72 states have internal predecessors, (88), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-23 00:01:54,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 104 transitions. [2023-11-23 00:01:54,826 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 104 transitions. Word has length 36 [2023-11-23 00:01:54,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 00:01:54,826 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 104 transitions. [2023-11-23 00:01:54,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-23 00:01:54,826 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 104 transitions. [2023-11-23 00:01:54,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-11-23 00:01:54,827 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 00:01:54,827 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 00:01:54,836 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-23 00:01:55,032 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,SelfDestructingSolverStorable7 [2023-11-23 00:01:55,033 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 00:01:55,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 00:01:55,034 INFO L85 PathProgramCache]: Analyzing trace with hash 531249981, now seen corresponding path program 3 times [2023-11-23 00:01:55,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 00:01:55,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969987105] [2023-11-23 00:01:55,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 00:01:55,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 00:01:55,056 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 00:01:55,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [43444812] [2023-11-23 00:01:55,056 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-23 00:01:55,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 00:01:55,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 00:01:55,059 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) [2023-11-23 00:01:55,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-23 00:01:55,141 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-23 00:01:55,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 00:01:55,142 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-23 00:01:55,143 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 00:01:55,231 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-23 00:01:55,231 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 00:01:55,381 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-11-23 00:01:55,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 00:01:55,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969987105] [2023-11-23 00:01:55,382 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 00:01:55,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43444812] [2023-11-23 00:01:55,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43444812] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 00:01:55,382 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 00:01:55,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2023-11-23 00:01:55,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054898829] [2023-11-23 00:01:55,385 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 00:01:55,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-23 00:01:55,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 00:01:55,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-23 00:01:55,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2023-11-23 00:01:55,386 INFO L87 Difference]: Start difference. First operand 84 states and 104 transitions. Second operand has 20 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 15 states have internal predecessors, (42), 3 states have call successors, (4), 2 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2023-11-23 00:01:55,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 00:01:55,707 INFO L93 Difference]: Finished difference Result 118 states and 143 transitions. [2023-11-23 00:01:55,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-23 00:01:55,707 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 15 states have internal predecessors, (42), 3 states have call successors, (4), 2 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 41 [2023-11-23 00:01:55,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 00:01:55,708 INFO L225 Difference]: With dead ends: 118 [2023-11-23 00:01:55,708 INFO L226 Difference]: Without dead ends: 114 [2023-11-23 00:01:55,709 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=248, Invalid=744, Unknown=0, NotChecked=0, Total=992 [2023-11-23 00:01:55,709 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 92 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 00:01:55,710 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 130 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 337 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 00:01:55,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2023-11-23 00:01:55,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 74. [2023-11-23 00:01:55,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 63 states have (on average 1.2222222222222223) internal successors, (77), 64 states have internal predecessors, (77), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-23 00:01:55,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 89 transitions. [2023-11-23 00:01:55,724 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 89 transitions. Word has length 41 [2023-11-23 00:01:55,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 00:01:55,725 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 89 transitions. [2023-11-23 00:01:55,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 15 states have internal predecessors, (42), 3 states have call successors, (4), 2 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2023-11-23 00:01:55,725 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 89 transitions. [2023-11-23 00:01:55,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-23 00:01:55,726 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 00:01:55,726 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-23 00:01:55,733 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-23 00:01:55,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 00:01:55,931 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 00:01:55,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 00:01:55,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1302902006, now seen corresponding path program 3 times [2023-11-23 00:01:55,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 00:01:55,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416041033] [2023-11-23 00:01:55,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 00:01:55,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 00:01:55,940 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 00:01:55,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2100067225] [2023-11-23 00:01:55,940 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-23 00:01:55,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 00:01:55,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 00:01:55,941 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) [2023-11-23 00:01:55,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-23 00:02:55,321 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-23 00:02:55,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 00:02:55,323 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-23 00:02:55,325 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 00:02:55,357 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-11-23 00:02:55,357 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 00:02:55,384 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-11-23 00:02:55,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 00:02:55,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416041033] [2023-11-23 00:02:55,385 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 00:02:55,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100067225] [2023-11-23 00:02:55,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100067225] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 00:02:55,385 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 00:02:55,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2023-11-23 00:02:55,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85824616] [2023-11-23 00:02:55,385 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 00:02:55,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-23 00:02:55,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 00:02:55,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-23 00:02:55,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-23 00:02:55,386 INFO L87 Difference]: Start difference. First operand 74 states and 89 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-23 00:02:55,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 00:02:55,446 INFO L93 Difference]: Finished difference Result 82 states and 96 transitions. [2023-11-23 00:02:55,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 00:02:55,446 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 44 [2023-11-23 00:02:55,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 00:02:55,447 INFO L225 Difference]: With dead ends: 82 [2023-11-23 00:02:55,447 INFO L226 Difference]: Without dead ends: 44 [2023-11-23 00:02:55,447 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 81 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2023-11-23 00:02:55,448 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 25 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 00:02:55,449 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 53 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 00:02:55,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-11-23 00:02:55,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2023-11-23 00:02:55,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 38 states have (on average 1.2105263157894737) internal successors, (46), 38 states have internal predecessors, (46), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-23 00:02:55,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2023-11-23 00:02:55,459 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 44 [2023-11-23 00:02:55,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 00:02:55,460 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2023-11-23 00:02:55,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-23 00:02:55,460 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2023-11-23 00:02:55,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-11-23 00:02:55,460 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 00:02:55,460 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 00:02:55,471 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-23 00:02:55,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-23 00:02:55,669 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 00:02:55,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 00:02:55,669 INFO L85 PathProgramCache]: Analyzing trace with hash 951775907, now seen corresponding path program 4 times [2023-11-23 00:02:55,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 00:02:55,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745282840] [2023-11-23 00:02:55,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 00:02:55,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 00:02:55,678 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 00:02:55,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [194016014] [2023-11-23 00:02:55,679 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-23 00:02:55,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 00:02:55,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 00:02:55,680 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 00:02:55,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-23 00:02:55,880 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-23 00:02:55,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 00:02:55,882 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 78 conjunts are in the unsatisfiable core [2023-11-23 00:02:55,885 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 00:02:55,937 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-23 00:02:55,966 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-11-23 00:02:56,097 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 00:02:56,098 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2023-11-23 00:02:56,133 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 00:02:56,133 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 38 [2023-11-23 00:02:56,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 00:02:56,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 00:02:56,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 00:02:56,633 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 00:02:56,648 INFO L349 Elim1Store]: treesize reduction 55, result has 16.7 percent of original size [2023-11-23 00:02:56,648 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 23 case distinctions, treesize of input 84 treesize of output 78 [2023-11-23 00:02:57,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 00:02:57,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 00:02:57,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 00:02:57,205 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 00:02:57,207 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 00:02:57,207 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 48 treesize of output 21 [2023-11-23 00:02:57,252 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 8 proven. 38 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 00:02:57,253 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 00:03:03,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 00:03:03,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745282840] [2023-11-23 00:03:03,306 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 00:03:03,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194016014] [2023-11-23 00:03:03,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194016014] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 00:03:03,306 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-23 00:03:03,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2023-11-23 00:03:03,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586091423] [2023-11-23 00:03:03,306 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-23 00:03:03,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-23 00:03:03,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 00:03:03,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-23 00:03:03,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=1585, Unknown=0, NotChecked=0, Total=1806 [2023-11-23 00:03:03,307 INFO L87 Difference]: Start difference. First operand 44 states and 52 transitions. Second operand has 30 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 26 states have internal predecessors, (38), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-23 00:03:04,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 00:03:04,733 INFO L93 Difference]: Finished difference Result 98 states and 122 transitions. [2023-11-23 00:03:04,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-11-23 00:03:04,733 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 26 states have internal predecessors, (38), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 47 [2023-11-23 00:03:04,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 00:03:04,734 INFO L225 Difference]: With dead ends: 98 [2023-11-23 00:03:04,734 INFO L226 Difference]: Without dead ends: 94 [2023-11-23 00:03:04,735 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 860 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=292, Invalid=2258, Unknown=0, NotChecked=0, Total=2550 [2023-11-23 00:03:04,736 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 67 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 632 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 00:03:04,736 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 149 Invalid, 641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 632 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 00:03:04,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2023-11-23 00:03:04,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 72. [2023-11-23 00:03:04,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 63 states have (on average 1.2380952380952381) internal successors, (78), 63 states have internal predecessors, (78), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-23 00:03:04,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 88 transitions. [2023-11-23 00:03:04,772 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 88 transitions. Word has length 47 [2023-11-23 00:03:04,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 00:03:04,772 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 88 transitions. [2023-11-23 00:03:04,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 26 states have internal predecessors, (38), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-23 00:03:04,772 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 88 transitions. [2023-11-23 00:03:04,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-11-23 00:03:04,773 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 00:03:04,773 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 00:03:04,784 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-23 00:03:04,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-23 00:03:04,984 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 00:03:04,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 00:03:04,984 INFO L85 PathProgramCache]: Analyzing trace with hash -1042368799, now seen corresponding path program 4 times [2023-11-23 00:03:04,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 00:03:04,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565329942] [2023-11-23 00:03:04,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 00:03:04,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 00:03:04,991 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 00:03:04,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [8552353] [2023-11-23 00:03:04,991 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-23 00:03:04,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 00:03:04,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 00:03:04,992 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 00:03:05,018 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-23 00:03:10,843 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-23 00:03:10,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 00:03:10,846 INFO L262 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 58 conjunts are in the unsatisfiable core [2023-11-23 00:03:10,848 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 00:03:10,871 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-23 00:03:10,895 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-11-23 00:03:10,969 INFO L349 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2023-11-23 00:03:10,969 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 30 [2023-11-23 00:03:11,011 INFO L349 Elim1Store]: treesize reduction 52, result has 22.4 percent of original size [2023-11-23 00:03:11,011 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 39 treesize of output 44 [2023-11-23 00:03:11,300 INFO L349 Elim1Store]: treesize reduction 190, result has 15.6 percent of original size [2023-11-23 00:03:11,301 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 66 treesize of output 62 [2023-11-23 00:03:11,557 INFO L349 Elim1Store]: treesize reduction 34, result has 2.9 percent of original size [2023-11-23 00:03:11,558 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 13 [2023-11-23 00:03:11,588 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 8 proven. 38 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 00:03:11,588 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 00:03:23,295 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 242 treesize of output 234 [2023-11-23 00:03:23,353 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 00:03:23,354 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 1928646 treesize of output 1850856 Killed by 15