./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops-crafted-1/nested_delay_nd.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3061b6dc Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/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 ../sv-benchmarks/c/loops-crafted-1/nested_delay_nd.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 39463d01f5c85d47bf5e231172595e96b8ff556c59c4a9ab8cf46a88a393b05c --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-3061b6d-m [2024-11-18 13:23:47,556 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-18 13:23:47,613 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-18 13:23:47,616 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-18 13:23:47,617 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-18 13:23:47,638 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-18 13:23:47,639 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-18 13:23:47,639 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-18 13:23:47,640 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-18 13:23:47,641 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-18 13:23:47,641 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-18 13:23:47,641 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-18 13:23:47,641 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-18 13:23:47,643 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-18 13:23:47,643 INFO L153 SettingsManager]: * Use SBE=true [2024-11-18 13:23:47,643 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-18 13:23:47,644 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-18 13:23:47,644 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-18 13:23:47,644 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-18 13:23:47,644 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-18 13:23:47,644 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-18 13:23:47,647 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-18 13:23:47,647 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-18 13:23:47,647 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-18 13:23:47,647 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-18 13:23:47,648 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-18 13:23:47,648 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-18 13:23:47,648 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-18 13:23:47,648 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-18 13:23:47,648 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-18 13:23:47,648 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-18 13:23:47,648 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-18 13:23:47,649 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-18 13:23:47,649 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-18 13:23:47,649 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-18 13:23:47,649 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-18 13:23:47,649 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-18 13:23:47,649 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-18 13:23:47,649 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-18 13:23:47,649 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-18 13:23:47,650 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-18 13:23:47,650 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-18 13:23:47,650 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 39463d01f5c85d47bf5e231172595e96b8ff556c59c4a9ab8cf46a88a393b05c [2024-11-18 13:23:47,844 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-18 13:23:47,863 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-18 13:23:47,866 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-18 13:23:47,866 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-18 13:23:47,867 INFO L274 PluginConnector]: CDTParser initialized [2024-11-18 13:23:47,868 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops-crafted-1/nested_delay_nd.c [2024-11-18 13:23:49,040 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-18 13:23:49,171 INFO L384 CDTParser]: Found 1 translation units. [2024-11-18 13:23:49,171 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/nested_delay_nd.c [2024-11-18 13:23:49,177 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1454fca7c/07e054ee60394baebaa410bf85da4f1b/FLAG6d82866ac [2024-11-18 13:23:49,601 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1454fca7c/07e054ee60394baebaa410bf85da4f1b [2024-11-18 13:23:49,603 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-18 13:23:49,604 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-18 13:23:49,605 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-18 13:23:49,605 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-18 13:23:49,609 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-18 13:23:49,610 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 01:23:49" (1/1) ... [2024-11-18 13:23:49,610 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@339ac35f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:23:49, skipping insertion in model container [2024-11-18 13:23:49,611 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 01:23:49" (1/1) ... [2024-11-18 13:23:49,624 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-18 13:23:49,763 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/nested_delay_nd.c[465,478] [2024-11-18 13:23:49,778 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-18 13:23:49,786 INFO L200 MainTranslator]: Completed pre-run [2024-11-18 13:23:49,797 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/nested_delay_nd.c[465,478] [2024-11-18 13:23:49,802 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-18 13:23:49,814 INFO L204 MainTranslator]: Completed translation [2024-11-18 13:23:49,814 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:23:49 WrapperNode [2024-11-18 13:23:49,814 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-18 13:23:49,815 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-18 13:23:49,815 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-18 13:23:49,816 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-18 13:23:49,820 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:23:49" (1/1) ... [2024-11-18 13:23:49,824 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:23:49" (1/1) ... [2024-11-18 13:23:49,836 INFO L138 Inliner]: procedures = 14, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 62 [2024-11-18 13:23:49,837 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-18 13:23:49,837 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-18 13:23:49,837 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-18 13:23:49,837 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-18 13:23:49,845 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:23:49" (1/1) ... [2024-11-18 13:23:49,845 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:23:49" (1/1) ... [2024-11-18 13:23:49,846 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:23:49" (1/1) ... [2024-11-18 13:23:49,857 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-11-18 13:23:49,858 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:23:49" (1/1) ... [2024-11-18 13:23:49,858 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:23:49" (1/1) ... [2024-11-18 13:23:49,860 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:23:49" (1/1) ... [2024-11-18 13:23:49,862 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:23:49" (1/1) ... [2024-11-18 13:23:49,865 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:23:49" (1/1) ... [2024-11-18 13:23:49,865 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:23:49" (1/1) ... [2024-11-18 13:23:49,866 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-18 13:23:49,867 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-18 13:23:49,867 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-18 13:23:49,867 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-18 13:23:49,867 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:23:49" (1/1) ... [2024-11-18 13:23:49,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-18 13:23:49,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 13:23:49,893 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-18 13:23:49,895 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-18 13:23:49,934 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-18 13:23:49,935 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-18 13:23:49,935 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-18 13:23:49,935 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-18 13:23:49,981 INFO L238 CfgBuilder]: Building ICFG [2024-11-18 13:23:49,983 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-18 13:23:50,107 INFO L? ?]: Removed 13 outVars from TransFormulas that were not future-live. [2024-11-18 13:23:50,107 INFO L287 CfgBuilder]: Performing block encoding [2024-11-18 13:23:50,115 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-18 13:23:50,115 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-18 13:23:50,115 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 01:23:50 BoogieIcfgContainer [2024-11-18 13:23:50,115 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-18 13:23:50,117 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-18 13:23:50,118 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-18 13:23:50,121 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-18 13:23:50,121 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 01:23:49" (1/3) ... [2024-11-18 13:23:50,121 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2082fc62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 01:23:50, skipping insertion in model container [2024-11-18 13:23:50,121 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:23:49" (2/3) ... [2024-11-18 13:23:50,122 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2082fc62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 01:23:50, skipping insertion in model container [2024-11-18 13:23:50,122 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 01:23:50" (3/3) ... [2024-11-18 13:23:50,122 INFO L112 eAbstractionObserver]: Analyzing ICFG nested_delay_nd.c [2024-11-18 13:23:50,137 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-18 13:23:50,137 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-18 13:23:50,175 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-18 13:23:50,180 INFO L333 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, 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;@5caba928, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-18 13:23:50,180 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-18 13:23:50,183 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 19 states have (on average 1.631578947368421) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 13:23:50,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-18 13:23:50,188 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 13:23:50,190 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 13:23:50,190 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 13:23:50,194 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 13:23:50,195 INFO L85 PathProgramCache]: Analyzing trace with hash -493598204, now seen corresponding path program 1 times [2024-11-18 13:23:50,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 13:23:50,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375394318] [2024-11-18 13:23:50,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 13:23:50,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 13:23:50,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 13:23:50,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 13:23:50,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 13:23:50,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375394318] [2024-11-18 13:23:50,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375394318] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-18 13:23:50,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-18 13:23:50,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-18 13:23:50,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928882751] [2024-11-18 13:23:50,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 13:23:50,331 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-18 13:23:50,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 13:23:50,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-18 13:23:50,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-18 13:23:50,347 INFO L87 Difference]: Start difference. First operand has 21 states, 19 states have (on average 1.631578947368421) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 13:23:50,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 13:23:50,356 INFO L93 Difference]: Finished difference Result 35 states and 55 transitions. [2024-11-18 13:23:50,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-18 13:23:50,357 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2024-11-18 13:23:50,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 13:23:50,362 INFO L225 Difference]: With dead ends: 35 [2024-11-18 13:23:50,362 INFO L226 Difference]: Without dead ends: 17 [2024-11-18 13:23:50,364 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-18 13:23:50,366 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-18 13:23:50,367 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-18 13:23:50,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2024-11-18 13:23:50,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2024-11-18 13:23:50,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 13:23:50,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 23 transitions. [2024-11-18 13:23:50,389 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 23 transitions. Word has length 12 [2024-11-18 13:23:50,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 13:23:50,389 INFO L471 AbstractCegarLoop]: Abstraction has 17 states and 23 transitions. [2024-11-18 13:23:50,389 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 13:23:50,389 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 23 transitions. [2024-11-18 13:23:50,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-18 13:23:50,390 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 13:23:50,390 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 13:23:50,390 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-18 13:23:50,390 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 13:23:50,391 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 13:23:50,391 INFO L85 PathProgramCache]: Analyzing trace with hash -2059231113, now seen corresponding path program 1 times [2024-11-18 13:23:50,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 13:23:50,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853419162] [2024-11-18 13:23:50,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 13:23:50,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 13:23:50,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 13:23:50,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 13:23:50,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 13:23:50,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853419162] [2024-11-18 13:23:50,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853419162] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-18 13:23:50,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-18 13:23:50,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-18 13:23:50,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053206835] [2024-11-18 13:23:50,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 13:23:50,483 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-18 13:23:50,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 13:23:50,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-18 13:23:50,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-18 13:23:50,484 INFO L87 Difference]: Start difference. First operand 17 states and 23 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 13:23:50,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 13:23:50,524 INFO L93 Difference]: Finished difference Result 33 states and 47 transitions. [2024-11-18 13:23:50,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-18 13:23:50,524 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2024-11-18 13:23:50,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 13:23:50,525 INFO L225 Difference]: With dead ends: 33 [2024-11-18 13:23:50,525 INFO L226 Difference]: Without dead ends: 20 [2024-11-18 13:23:50,525 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-18 13:23:50,526 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 25 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-18 13:23:50,526 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 19 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-18 13:23:50,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2024-11-18 13:23:50,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2024-11-18 13:23:50,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 13:23:50,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 24 transitions. [2024-11-18 13:23:50,530 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 24 transitions. Word has length 12 [2024-11-18 13:23:50,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 13:23:50,530 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 24 transitions. [2024-11-18 13:23:50,531 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 13:23:50,531 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 24 transitions. [2024-11-18 13:23:50,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-18 13:23:50,532 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 13:23:50,532 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 13:23:50,532 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-18 13:23:50,533 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 13:23:50,533 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 13:23:50,533 INFO L85 PathProgramCache]: Analyzing trace with hash 573171571, now seen corresponding path program 1 times [2024-11-18 13:23:50,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 13:23:50,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409366209] [2024-11-18 13:23:50,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 13:23:50,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 13:23:50,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 13:23:50,605 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-18 13:23:50,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 13:23:50,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409366209] [2024-11-18 13:23:50,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409366209] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-18 13:23:50,605 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-18 13:23:50,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-18 13:23:50,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968547384] [2024-11-18 13:23:50,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 13:23:50,606 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-18 13:23:50,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 13:23:50,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-18 13:23:50,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-18 13:23:50,610 INFO L87 Difference]: Start difference. First operand 18 states and 24 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 13:23:50,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 13:23:50,639 INFO L93 Difference]: Finished difference Result 36 states and 51 transitions. [2024-11-18 13:23:50,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-18 13:23:50,639 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2024-11-18 13:23:50,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 13:23:50,641 INFO L225 Difference]: With dead ends: 36 [2024-11-18 13:23:50,641 INFO L226 Difference]: Without dead ends: 22 [2024-11-18 13:23:50,641 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-18 13:23:50,642 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 5 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-18 13:23:50,642 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 30 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-18 13:23:50,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2024-11-18 13:23:50,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 19. [2024-11-18 13:23:50,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 13:23:50,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 25 transitions. [2024-11-18 13:23:50,645 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 25 transitions. Word has length 15 [2024-11-18 13:23:50,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 13:23:50,645 INFO L471 AbstractCegarLoop]: Abstraction has 19 states and 25 transitions. [2024-11-18 13:23:50,645 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 13:23:50,645 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 25 transitions. [2024-11-18 13:23:50,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-18 13:23:50,646 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 13:23:50,646 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 13:23:50,647 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-18 13:23:50,647 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 13:23:50,648 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 13:23:50,648 INFO L85 PathProgramCache]: Analyzing trace with hash 630429873, now seen corresponding path program 1 times [2024-11-18 13:23:50,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 13:23:50,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138844433] [2024-11-18 13:23:50,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 13:23:50,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 13:23:50,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 13:23:50,758 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-18 13:23:50,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 13:23:50,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138844433] [2024-11-18 13:23:50,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138844433] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-18 13:23:50,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-18 13:23:50,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-18 13:23:50,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026019523] [2024-11-18 13:23:50,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 13:23:50,759 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-18 13:23:50,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 13:23:50,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-18 13:23:50,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-18 13:23:50,760 INFO L87 Difference]: Start difference. First operand 19 states and 25 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 13:23:50,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 13:23:50,785 INFO L93 Difference]: Finished difference Result 49 states and 67 transitions. [2024-11-18 13:23:50,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-18 13:23:50,786 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2024-11-18 13:23:50,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 13:23:50,787 INFO L225 Difference]: With dead ends: 49 [2024-11-18 13:23:50,787 INFO L226 Difference]: Without dead ends: 34 [2024-11-18 13:23:50,787 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-18 13:23:50,788 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 40 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-18 13:23:50,788 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 29 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-18 13:23:50,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-11-18 13:23:50,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2024-11-18 13:23:50,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.4193548387096775) internal successors, (44), 31 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 13:23:50,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 44 transitions. [2024-11-18 13:23:50,797 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 44 transitions. Word has length 15 [2024-11-18 13:23:50,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 13:23:50,797 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 44 transitions. [2024-11-18 13:23:50,797 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 13:23:50,797 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 44 transitions. [2024-11-18 13:23:50,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-18 13:23:50,800 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 13:23:50,800 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 13:23:50,800 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-18 13:23:50,803 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 13:23:50,803 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 13:23:50,804 INFO L85 PathProgramCache]: Analyzing trace with hash 630489455, now seen corresponding path program 1 times [2024-11-18 13:23:50,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 13:23:50,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018264185] [2024-11-18 13:23:50,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 13:23:50,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 13:23:50,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 13:23:50,882 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 13:23:50,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 13:23:50,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018264185] [2024-11-18 13:23:50,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018264185] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 13:23:50,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78228097] [2024-11-18 13:23:50,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 13:23:50,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 13:23:50,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 13:23:50,885 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) [2024-11-18 13:23:50,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-18 13:23:50,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 13:23:50,936 INFO L255 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-18 13:23:50,940 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 13:23:51,005 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 13:23:51,005 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 13:23:51,040 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 13:23:51,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78228097] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 13:23:51,040 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 13:23:51,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2024-11-18 13:23:51,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602796090] [2024-11-18 13:23:51,041 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 13:23:51,043 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-18 13:23:51,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 13:23:51,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-18 13:23:51,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-11-18 13:23:51,044 INFO L87 Difference]: Start difference. First operand 32 states and 44 transitions. Second operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 13:23:51,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 13:23:51,132 INFO L93 Difference]: Finished difference Result 78 states and 114 transitions. [2024-11-18 13:23:51,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-18 13:23:51,133 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2024-11-18 13:23:51,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 13:23:51,133 INFO L225 Difference]: With dead ends: 78 [2024-11-18 13:23:51,133 INFO L226 Difference]: Without dead ends: 50 [2024-11-18 13:23:51,134 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2024-11-18 13:23:51,135 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 57 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-18 13:23:51,135 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 37 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-18 13:23:51,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2024-11-18 13:23:51,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2024-11-18 13:23:51,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.3877551020408163) internal successors, (68), 49 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 13:23:51,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 68 transitions. [2024-11-18 13:23:51,141 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 68 transitions. Word has length 15 [2024-11-18 13:23:51,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 13:23:51,141 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 68 transitions. [2024-11-18 13:23:51,141 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 13:23:51,141 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 68 transitions. [2024-11-18 13:23:51,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-18 13:23:51,142 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 13:23:51,142 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 13:23:51,155 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-18 13:23:51,346 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 13:23:51,347 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 13:23:51,347 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 13:23:51,347 INFO L85 PathProgramCache]: Analyzing trace with hash -901646477, now seen corresponding path program 2 times [2024-11-18 13:23:51,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 13:23:51,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518804245] [2024-11-18 13:23:51,348 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-18 13:23:51,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 13:23:51,366 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-18 13:23:51,366 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 13:23:51,454 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-18 13:23:51,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 13:23:51,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518804245] [2024-11-18 13:23:51,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518804245] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 13:23:51,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803148464] [2024-11-18 13:23:51,454 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-18 13:23:51,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 13:23:51,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 13:23:51,457 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) [2024-11-18 13:23:51,458 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-18 13:23:51,492 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-18 13:23:51,493 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 13:23:51,494 INFO L255 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-18 13:23:51,495 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 13:23:51,613 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-18 13:23:51,615 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 13:23:51,673 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-18 13:23:51,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803148464] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 13:23:51,674 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 13:23:51,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 13 [2024-11-18 13:23:51,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613265726] [2024-11-18 13:23:51,674 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 13:23:51,675 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-18 13:23:51,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 13:23:51,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-18 13:23:51,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2024-11-18 13:23:51,676 INFO L87 Difference]: Start difference. First operand 50 states and 68 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 13:23:51,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 13:23:51,877 INFO L93 Difference]: Finished difference Result 169 states and 233 transitions. [2024-11-18 13:23:51,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-18 13:23:51,878 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2024-11-18 13:23:51,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 13:23:51,879 INFO L225 Difference]: With dead ends: 169 [2024-11-18 13:23:51,879 INFO L226 Difference]: Without dead ends: 123 [2024-11-18 13:23:51,879 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=409, Unknown=0, NotChecked=0, Total=552 [2024-11-18 13:23:51,880 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 129 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-18 13:23:51,880 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 61 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-18 13:23:51,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2024-11-18 13:23:51,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 112. [2024-11-18 13:23:51,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 1.2972972972972974) internal successors, (144), 111 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 13:23:51,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 144 transitions. [2024-11-18 13:23:51,896 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 144 transitions. Word has length 24 [2024-11-18 13:23:51,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 13:23:51,896 INFO L471 AbstractCegarLoop]: Abstraction has 112 states and 144 transitions. [2024-11-18 13:23:51,896 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 13:23:51,896 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 144 transitions. [2024-11-18 13:23:51,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-18 13:23:51,897 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 13:23:51,897 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 13:23:51,910 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-18 13:23:52,097 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-18 13:23:52,098 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 13:23:52,098 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 13:23:52,098 INFO L85 PathProgramCache]: Analyzing trace with hash 1057536243, now seen corresponding path program 1 times [2024-11-18 13:23:52,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 13:23:52,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598571568] [2024-11-18 13:23:52,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 13:23:52,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 13:23:52,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 13:23:52,130 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-18 13:23:52,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 13:23:52,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598571568] [2024-11-18 13:23:52,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598571568] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-18 13:23:52,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-18 13:23:52,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-18 13:23:52,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279703522] [2024-11-18 13:23:52,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 13:23:52,131 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-18 13:23:52,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 13:23:52,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-18 13:23:52,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-18 13:23:52,132 INFO L87 Difference]: Start difference. First operand 112 states and 144 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 13:23:52,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 13:23:52,153 INFO L93 Difference]: Finished difference Result 241 states and 315 transitions. [2024-11-18 13:23:52,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-18 13:23:52,153 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2024-11-18 13:23:52,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 13:23:52,154 INFO L225 Difference]: With dead ends: 241 [2024-11-18 13:23:52,154 INFO L226 Difference]: Without dead ends: 133 [2024-11-18 13:23:52,155 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-18 13:23:52,155 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 1 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-18 13:23:52,155 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 38 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-18 13:23:52,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2024-11-18 13:23:52,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 108. [2024-11-18 13:23:52,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 1.280373831775701) internal successors, (137), 107 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 13:23:52,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 137 transitions. [2024-11-18 13:23:52,165 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 137 transitions. Word has length 24 [2024-11-18 13:23:52,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 13:23:52,165 INFO L471 AbstractCegarLoop]: Abstraction has 108 states and 137 transitions. [2024-11-18 13:23:52,165 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 13:23:52,166 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 137 transitions. [2024-11-18 13:23:52,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-11-18 13:23:52,166 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 13:23:52,166 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 13:23:52,166 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-18 13:23:52,166 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 13:23:52,167 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 13:23:52,167 INFO L85 PathProgramCache]: Analyzing trace with hash -2131488921, now seen corresponding path program 1 times [2024-11-18 13:23:52,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 13:23:52,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044548777] [2024-11-18 13:23:52,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 13:23:52,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 13:23:52,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 13:23:52,197 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-18 13:23:52,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 13:23:52,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044548777] [2024-11-18 13:23:52,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044548777] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-18 13:23:52,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-18 13:23:52,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-18 13:23:52,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175582479] [2024-11-18 13:23:52,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 13:23:52,200 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-18 13:23:52,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 13:23:52,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-18 13:23:52,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-18 13:23:52,200 INFO L87 Difference]: Start difference. First operand 108 states and 137 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 13:23:52,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 13:23:52,213 INFO L93 Difference]: Finished difference Result 165 states and 211 transitions. [2024-11-18 13:23:52,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-18 13:23:52,214 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2024-11-18 13:23:52,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 13:23:52,214 INFO L225 Difference]: With dead ends: 165 [2024-11-18 13:23:52,215 INFO L226 Difference]: Without dead ends: 112 [2024-11-18 13:23:52,215 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-18 13:23:52,215 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 3 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-18 13:23:52,216 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 35 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-18 13:23:52,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2024-11-18 13:23:52,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2024-11-18 13:23:52,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 1.2522522522522523) internal successors, (139), 111 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 13:23:52,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 139 transitions. [2024-11-18 13:23:52,224 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 139 transitions. Word has length 25 [2024-11-18 13:23:52,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 13:23:52,225 INFO L471 AbstractCegarLoop]: Abstraction has 112 states and 139 transitions. [2024-11-18 13:23:52,225 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 13:23:52,225 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 139 transitions. [2024-11-18 13:23:52,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-11-18 13:23:52,225 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 13:23:52,225 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 13:23:52,225 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-18 13:23:52,226 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 13:23:52,228 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 13:23:52,228 INFO L85 PathProgramCache]: Analyzing trace with hash -2129582297, now seen corresponding path program 1 times [2024-11-18 13:23:52,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 13:23:52,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139484477] [2024-11-18 13:23:52,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 13:23:52,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 13:23:52,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 13:23:52,312 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 13:23:52,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 13:23:52,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139484477] [2024-11-18 13:23:52,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139484477] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 13:23:52,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078420509] [2024-11-18 13:23:52,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 13:23:52,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 13:23:52,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 13:23:52,315 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) [2024-11-18 13:23:52,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-18 13:23:52,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 13:23:52,353 INFO L255 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-18 13:23:52,355 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 13:23:52,449 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 13:23:52,450 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 13:23:52,534 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 13:23:52,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078420509] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 13:23:52,534 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 13:23:52,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2024-11-18 13:23:52,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603590587] [2024-11-18 13:23:52,534 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 13:23:52,534 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-18 13:23:52,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 13:23:52,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-18 13:23:52,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=195, Unknown=0, NotChecked=0, Total=342 [2024-11-18 13:23:52,535 INFO L87 Difference]: Start difference. First operand 112 states and 139 transitions. Second operand has 19 states, 19 states have (on average 3.0) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 13:23:52,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 13:23:52,660 INFO L93 Difference]: Finished difference Result 328 states and 442 transitions. [2024-11-18 13:23:52,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-18 13:23:52,661 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2024-11-18 13:23:52,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 13:23:52,662 INFO L225 Difference]: With dead ends: 328 [2024-11-18 13:23:52,662 INFO L226 Difference]: Without dead ends: 220 [2024-11-18 13:23:52,663 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=222, Invalid=330, Unknown=0, NotChecked=0, Total=552 [2024-11-18 13:23:52,663 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 63 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-18 13:23:52,663 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 42 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-18 13:23:52,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2024-11-18 13:23:52,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 220. [2024-11-18 13:23:52,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 1.2374429223744292) internal successors, (271), 219 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 13:23:52,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 271 transitions. [2024-11-18 13:23:52,686 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 271 transitions. Word has length 25 [2024-11-18 13:23:52,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 13:23:52,687 INFO L471 AbstractCegarLoop]: Abstraction has 220 states and 271 transitions. [2024-11-18 13:23:52,687 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 13:23:52,687 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 271 transitions. [2024-11-18 13:23:52,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-18 13:23:52,688 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 13:23:52,688 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 13:23:52,702 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-18 13:23:52,891 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 13:23:52,891 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 13:23:52,891 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 13:23:52,891 INFO L85 PathProgramCache]: Analyzing trace with hash -1593832537, now seen corresponding path program 2 times [2024-11-18 13:23:52,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 13:23:52,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117762778] [2024-11-18 13:23:52,892 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-18 13:23:52,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 13:23:52,903 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-18 13:23:52,903 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 13:23:53,065 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 13:23:53,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 13:23:53,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117762778] [2024-11-18 13:23:53,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117762778] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 13:23:53,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585775006] [2024-11-18 13:23:53,065 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-18 13:23:53,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 13:23:53,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 13:23:53,067 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) [2024-11-18 13:23:53,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-18 13:23:53,106 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-18 13:23:53,107 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 13:23:53,107 INFO L255 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-18 13:23:53,109 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 13:23:53,285 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 13:23:53,285 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 13:23:53,538 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 13:23:53,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585775006] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 13:23:53,539 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 13:23:53,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 36 [2024-11-18 13:23:53,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39093979] [2024-11-18 13:23:53,539 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 13:23:53,539 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-11-18 13:23:53,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 13:23:53,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-11-18 13:23:53,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=579, Invalid=753, Unknown=0, NotChecked=0, Total=1332 [2024-11-18 13:23:53,541 INFO L87 Difference]: Start difference. First operand 220 states and 271 transitions. Second operand has 37 states, 37 states have (on average 3.0) internal successors, (111), 36 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 13:23:53,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 13:23:53,886 INFO L93 Difference]: Finished difference Result 652 states and 874 transitions. [2024-11-18 13:23:53,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-18 13:23:53,887 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 3.0) internal successors, (111), 36 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2024-11-18 13:23:53,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 13:23:53,888 INFO L225 Difference]: With dead ends: 652 [2024-11-18 13:23:53,888 INFO L226 Difference]: Without dead ends: 436 [2024-11-18 13:23:53,889 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 745 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=876, Invalid=1380, Unknown=0, NotChecked=0, Total=2256 [2024-11-18 13:23:53,890 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 133 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-18 13:23:53,890 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 54 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-18 13:23:53,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2024-11-18 13:23:53,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 436. [2024-11-18 13:23:53,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 435 states have (on average 1.2298850574712643) internal successors, (535), 435 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 13:23:53,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 535 transitions. [2024-11-18 13:23:53,910 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 535 transitions. Word has length 43 [2024-11-18 13:23:53,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 13:23:53,910 INFO L471 AbstractCegarLoop]: Abstraction has 436 states and 535 transitions. [2024-11-18 13:23:53,911 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 3.0) internal successors, (111), 36 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 13:23:53,911 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 535 transitions. [2024-11-18 13:23:53,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2024-11-18 13:23:53,912 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 13:23:53,912 INFO L215 NwaCegarLoop]: trace histogram [22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 13:23:53,925 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-18 13:23:54,116 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 13:23:54,117 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 13:23:54,117 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 13:23:54,117 INFO L85 PathProgramCache]: Analyzing trace with hash 48592039, now seen corresponding path program 3 times [2024-11-18 13:23:54,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 13:23:54,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321011268] [2024-11-18 13:23:54,118 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-18 13:23:54,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 13:23:54,128 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-18 13:23:54,128 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 13:23:54,243 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 651 trivial. 0 not checked. [2024-11-18 13:23:54,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 13:23:54,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321011268] [2024-11-18 13:23:54,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321011268] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-18 13:23:54,244 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-18 13:23:54,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-18 13:23:54,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449497261] [2024-11-18 13:23:54,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 13:23:54,244 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-18 13:23:54,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 13:23:54,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-18 13:23:54,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-11-18 13:23:54,245 INFO L87 Difference]: Start difference. First operand 436 states and 535 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 13:23:54,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 13:23:54,331 INFO L93 Difference]: Finished difference Result 651 states and 800 transitions. [2024-11-18 13:23:54,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-18 13:23:54,332 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2024-11-18 13:23:54,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 13:23:54,333 INFO L225 Difference]: With dead ends: 651 [2024-11-18 13:23:54,333 INFO L226 Difference]: Without dead ends: 649 [2024-11-18 13:23:54,334 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-11-18 13:23:54,334 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 3 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-18 13:23:54,334 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 35 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-18 13:23:54,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 649 states. [2024-11-18 13:23:54,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 649 to 649. [2024-11-18 13:23:54,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 649 states, 648 states have (on average 1.228395061728395) internal successors, (796), 648 states have internal predecessors, (796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 13:23:54,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 649 states to 649 states and 796 transitions. [2024-11-18 13:23:54,363 INFO L78 Accepts]: Start accepts. Automaton has 649 states and 796 transitions. Word has length 79 [2024-11-18 13:23:54,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 13:23:54,363 INFO L471 AbstractCegarLoop]: Abstraction has 649 states and 796 transitions. [2024-11-18 13:23:54,364 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 13:23:54,364 INFO L276 IsEmpty]: Start isEmpty. Operand 649 states and 796 transitions. [2024-11-18 13:23:54,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2024-11-18 13:23:54,364 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 13:23:54,364 INFO L215 NwaCegarLoop]: trace histogram [22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 13:23:54,364 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-18 13:23:54,364 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 13:23:54,365 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 13:23:54,365 INFO L85 PathProgramCache]: Analyzing trace with hash -985230169, now seen corresponding path program 1 times [2024-11-18 13:23:54,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 13:23:54,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084055682] [2024-11-18 13:23:54,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 13:23:54,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 13:23:54,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 13:23:54,449 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2024-11-18 13:23:54,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 13:23:54,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084055682] [2024-11-18 13:23:54,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084055682] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-18 13:23:54,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-18 13:23:54,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-18 13:23:54,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839251188] [2024-11-18 13:23:54,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 13:23:54,450 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-18 13:23:54,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 13:23:54,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-18 13:23:54,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-18 13:23:54,451 INFO L87 Difference]: Start difference. First operand 649 states and 796 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 13:23:54,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 13:23:54,504 INFO L93 Difference]: Finished difference Result 1085 states and 1331 transitions. [2024-11-18 13:23:54,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-18 13:23:54,505 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2024-11-18 13:23:54,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 13:23:54,507 INFO L225 Difference]: With dead ends: 1085 [2024-11-18 13:23:54,507 INFO L226 Difference]: Without dead ends: 868 [2024-11-18 13:23:54,508 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2024-11-18 13:23:54,508 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 61 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-18 13:23:54,509 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 39 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-18 13:23:54,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 868 states. [2024-11-18 13:23:54,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 868 to 789. [2024-11-18 13:23:54,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 789 states, 788 states have (on average 1.2461928934010151) internal successors, (982), 788 states have internal predecessors, (982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 13:23:54,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 789 states to 789 states and 982 transitions. [2024-11-18 13:23:54,541 INFO L78 Accepts]: Start accepts. Automaton has 789 states and 982 transitions. Word has length 79 [2024-11-18 13:23:54,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 13:23:54,541 INFO L471 AbstractCegarLoop]: Abstraction has 789 states and 982 transitions. [2024-11-18 13:23:54,541 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 13:23:54,541 INFO L276 IsEmpty]: Start isEmpty. Operand 789 states and 982 transitions. [2024-11-18 13:23:54,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2024-11-18 13:23:54,551 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 13:23:54,551 INFO L215 NwaCegarLoop]: trace histogram [44, 44, 44, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 13:23:54,551 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-18 13:23:54,551 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 13:23:54,552 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 13:23:54,552 INFO L85 PathProgramCache]: Analyzing trace with hash 481659748, now seen corresponding path program 1 times [2024-11-18 13:23:54,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 13:23:54,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625251222] [2024-11-18 13:23:54,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 13:23:54,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 13:23:54,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 13:23:55,084 INFO L134 CoverageAnalysis]: Checked inductivity of 2934 backedges. 1498 proven. 715 refuted. 0 times theorem prover too weak. 721 trivial. 0 not checked. [2024-11-18 13:23:55,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 13:23:55,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625251222] [2024-11-18 13:23:55,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625251222] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 13:23:55,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396311503] [2024-11-18 13:23:55,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 13:23:55,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 13:23:55,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 13:23:55,086 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) [2024-11-18 13:23:55,087 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-18 13:23:55,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 13:23:55,157 INFO L255 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-18 13:23:55,163 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 13:23:55,629 INFO L134 CoverageAnalysis]: Checked inductivity of 2934 backedges. 1498 proven. 715 refuted. 0 times theorem prover too weak. 721 trivial. 0 not checked. [2024-11-18 13:23:55,629 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 13:23:56,343 INFO L134 CoverageAnalysis]: Checked inductivity of 2934 backedges. 1498 proven. 715 refuted. 0 times theorem prover too weak. 721 trivial. 0 not checked. [2024-11-18 13:23:56,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396311503] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 13:23:56,343 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 13:23:56,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 72 [2024-11-18 13:23:56,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667021515] [2024-11-18 13:23:56,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 13:23:56,344 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2024-11-18 13:23:56,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 13:23:56,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2024-11-18 13:23:56,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2307, Invalid=2949, Unknown=0, NotChecked=0, Total=5256 [2024-11-18 13:23:56,348 INFO L87 Difference]: Start difference. First operand 789 states and 982 transitions. Second operand has 73 states, 73 states have (on average 3.095890410958904) internal successors, (226), 72 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 13:23:57,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 13:23:57,223 INFO L93 Difference]: Finished difference Result 2171 states and 2968 transitions. [2024-11-18 13:23:57,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2024-11-18 13:23:57,224 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 3.095890410958904) internal successors, (226), 72 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 154 [2024-11-18 13:23:57,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 13:23:57,228 INFO L225 Difference]: With dead ends: 2171 [2024-11-18 13:23:57,228 INFO L226 Difference]: Without dead ends: 1581 [2024-11-18 13:23:57,230 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 260 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3217 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=3480, Invalid=5640, Unknown=0, NotChecked=0, Total=9120 [2024-11-18 13:23:57,230 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 413 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 413 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-18 13:23:57,230 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [413 Valid, 42 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-18 13:23:57,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1581 states. [2024-11-18 13:23:57,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1581 to 1581. [2024-11-18 13:23:57,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1581 states, 1580 states have (on average 1.2443037974683544) internal successors, (1966), 1580 states have internal predecessors, (1966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 13:23:57,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1581 states to 1581 states and 1966 transitions. [2024-11-18 13:23:57,282 INFO L78 Accepts]: Start accepts. Automaton has 1581 states and 1966 transitions. Word has length 154 [2024-11-18 13:23:57,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 13:23:57,282 INFO L471 AbstractCegarLoop]: Abstraction has 1581 states and 1966 transitions. [2024-11-18 13:23:57,283 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 3.095890410958904) internal successors, (226), 72 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 13:23:57,283 INFO L276 IsEmpty]: Start isEmpty. Operand 1581 states and 1966 transitions. [2024-11-18 13:23:57,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2024-11-18 13:23:57,285 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 13:23:57,285 INFO L215 NwaCegarLoop]: trace histogram [92, 92, 92, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 13:23:57,298 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-18 13:23:57,491 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-18 13:23:57,492 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 13:23:57,492 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 13:23:57,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1987848604, now seen corresponding path program 2 times [2024-11-18 13:23:57,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 13:23:57,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286480952] [2024-11-18 13:23:57,493 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-18 13:23:57,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 13:23:57,541 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-18 13:23:57,541 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 13:23:59,119 INFO L134 CoverageAnalysis]: Checked inductivity of 12750 backedges. 6442 proven. 3151 refuted. 0 times theorem prover too weak. 3157 trivial. 0 not checked. [2024-11-18 13:23:59,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 13:23:59,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286480952] [2024-11-18 13:23:59,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286480952] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 13:23:59,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348902937] [2024-11-18 13:23:59,120 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-18 13:23:59,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 13:23:59,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 13:23:59,121 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) [2024-11-18 13:23:59,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-18 13:23:59,211 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-18 13:23:59,211 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 13:23:59,213 INFO L255 TraceCheckSpWp]: Trace formula consists of 633 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-11-18 13:23:59,217 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 13:24:00,303 INFO L134 CoverageAnalysis]: Checked inductivity of 12750 backedges. 6442 proven. 3151 refuted. 0 times theorem prover too weak. 3157 trivial. 0 not checked. [2024-11-18 13:24:00,303 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 13:24:02,444 INFO L134 CoverageAnalysis]: Checked inductivity of 12750 backedges. 6442 proven. 3151 refuted. 0 times theorem prover too weak. 3157 trivial. 0 not checked. [2024-11-18 13:24:02,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348902937] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 13:24:02,445 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 13:24:02,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 144 [2024-11-18 13:24:02,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990724888] [2024-11-18 13:24:02,445 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 13:24:02,445 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 145 states [2024-11-18 13:24:02,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 13:24:02,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 145 interpolants. [2024-11-18 13:24:02,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9219, Invalid=11661, Unknown=0, NotChecked=0, Total=20880 [2024-11-18 13:24:02,451 INFO L87 Difference]: Start difference. First operand 1581 states and 1966 transitions. Second operand has 145 states, 145 states have (on average 3.0482758620689654) internal successors, (442), 144 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 13:24:05,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 13:24:05,006 INFO L93 Difference]: Finished difference Result 4331 states and 5920 transitions. [2024-11-18 13:24:05,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2024-11-18 13:24:05,007 INFO L78 Accepts]: Start accepts. Automaton has has 145 states, 145 states have (on average 3.0482758620689654) internal successors, (442), 144 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 298 [2024-11-18 13:24:05,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 13:24:05,015 INFO L225 Difference]: With dead ends: 4331 [2024-11-18 13:24:05,015 INFO L226 Difference]: Without dead ends: 3165 [2024-11-18 13:24:05,020 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 690 GetRequests, 500 SyntacticMatches, 0 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13345 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=13872, Invalid=22800, Unknown=0, NotChecked=0, Total=36672 [2024-11-18 13:24:05,020 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 684 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 487 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 684 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-18 13:24:05,020 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [684 Valid, 36 Invalid, 489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 487 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-18 13:24:05,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3165 states. [2024-11-18 13:24:05,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3165 to 3165. [2024-11-18 13:24:05,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3165 states, 3164 states have (on average 1.2433628318584071) internal successors, (3934), 3164 states have internal predecessors, (3934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 13:24:05,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3165 states to 3165 states and 3934 transitions. [2024-11-18 13:24:05,119 INFO L78 Accepts]: Start accepts. Automaton has 3165 states and 3934 transitions. Word has length 298 [2024-11-18 13:24:05,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 13:24:05,119 INFO L471 AbstractCegarLoop]: Abstraction has 3165 states and 3934 transitions. [2024-11-18 13:24:05,120 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 145 states, 145 states have (on average 3.0482758620689654) internal successors, (442), 144 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 13:24:05,120 INFO L276 IsEmpty]: Start isEmpty. Operand 3165 states and 3934 transitions. [2024-11-18 13:24:05,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 587 [2024-11-18 13:24:05,127 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 13:24:05,127 INFO L215 NwaCegarLoop]: trace histogram [188, 188, 188, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 13:24:05,139 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-18 13:24:05,327 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 13:24:05,327 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 13:24:05,328 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 13:24:05,328 INFO L85 PathProgramCache]: Analyzing trace with hash 1907584100, now seen corresponding path program 3 times [2024-11-18 13:24:05,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 13:24:05,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350849984] [2024-11-18 13:24:05,328 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-18 13:24:05,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 13:24:05,350 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-18 13:24:05,350 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 13:24:05,412 INFO L134 CoverageAnalysis]: Checked inductivity of 53118 backedges. 26890 proven. 0 refuted. 0 times theorem prover too weak. 26228 trivial. 0 not checked. [2024-11-18 13:24:05,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 13:24:05,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350849984] [2024-11-18 13:24:05,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350849984] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-18 13:24:05,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-18 13:24:05,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-18 13:24:05,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161513631] [2024-11-18 13:24:05,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 13:24:05,415 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-18 13:24:05,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 13:24:05,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-18 13:24:05,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-18 13:24:05,416 INFO L87 Difference]: Start difference. First operand 3165 states and 3934 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 13:24:05,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 13:24:05,497 INFO L93 Difference]: Finished difference Result 3167 states and 3935 transitions. [2024-11-18 13:24:05,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-18 13:24:05,497 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 586 [2024-11-18 13:24:05,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 13:24:05,503 INFO L225 Difference]: With dead ends: 3167 [2024-11-18 13:24:05,503 INFO L226 Difference]: Without dead ends: 2296 [2024-11-18 13:24:05,507 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-18 13:24:05,507 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 15 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-18 13:24:05,508 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 19 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-18 13:24:05,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2296 states. [2024-11-18 13:24:05,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2296 to 2296. [2024-11-18 13:24:05,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2296 states, 2295 states have (on average 1.3311546840958606) internal successors, (3055), 2295 states have internal predecessors, (3055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 13:24:05,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2296 states to 2296 states and 3055 transitions. [2024-11-18 13:24:05,589 INFO L78 Accepts]: Start accepts. Automaton has 2296 states and 3055 transitions. Word has length 586 [2024-11-18 13:24:05,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 13:24:05,589 INFO L471 AbstractCegarLoop]: Abstraction has 2296 states and 3055 transitions. [2024-11-18 13:24:05,589 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 13:24:05,590 INFO L276 IsEmpty]: Start isEmpty. Operand 2296 states and 3055 transitions. [2024-11-18 13:24:05,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 587 [2024-11-18 13:24:05,597 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 13:24:05,598 INFO L215 NwaCegarLoop]: trace histogram [188, 188, 186, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 13:24:05,598 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-18 13:24:05,598 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 13:24:05,598 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 13:24:05,598 INFO L85 PathProgramCache]: Analyzing trace with hash 658504804, now seen corresponding path program 1 times [2024-11-18 13:24:05,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 13:24:05,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136885759] [2024-11-18 13:24:05,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 13:24:05,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 13:24:05,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 13:24:11,006 INFO L134 CoverageAnalysis]: Checked inductivity of 53118 backedges. 26698 proven. 13207 refuted. 0 times theorem prover too weak. 13213 trivial. 0 not checked. [2024-11-18 13:24:11,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 13:24:11,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136885759] [2024-11-18 13:24:11,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136885759] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 13:24:11,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248395084] [2024-11-18 13:24:11,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 13:24:11,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 13:24:11,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 13:24:11,008 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) [2024-11-18 13:24:11,009 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-18 13:24:11,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 13:24:11,159 INFO L255 TraceCheckSpWp]: Trace formula consists of 1211 conjuncts, 97 conjuncts are in the unsatisfiable core [2024-11-18 13:24:11,165 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 13:24:14,480 INFO L134 CoverageAnalysis]: Checked inductivity of 53118 backedges. 26698 proven. 13207 refuted. 0 times theorem prover too weak. 13213 trivial. 0 not checked. [2024-11-18 13:24:14,481 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 13:24:22,522 INFO L134 CoverageAnalysis]: Checked inductivity of 53118 backedges. 26698 proven. 13207 refuted. 0 times theorem prover too weak. 13213 trivial. 0 not checked. [2024-11-18 13:24:22,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248395084] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 13:24:22,522 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 13:24:22,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97, 97] total 288 [2024-11-18 13:24:22,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580185217] [2024-11-18 13:24:22,523 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 13:24:22,524 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 289 states [2024-11-18 13:24:22,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 13:24:22,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 289 interpolants. [2024-11-18 13:24:22,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36867, Invalid=46365, Unknown=0, NotChecked=0, Total=83232 [2024-11-18 13:24:22,536 INFO L87 Difference]: Start difference. First operand 2296 states and 3055 transitions. Second operand has 289 states, 289 states have (on average 3.027681660899654) internal successors, (875), 288 states have internal predecessors, (875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 13:24:34,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 13:24:34,512 INFO L93 Difference]: Finished difference Result 6330 states and 9197 transitions. [2024-11-18 13:24:34,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 193 states. [2024-11-18 13:24:34,513 INFO L78 Accepts]: Start accepts. Automaton has has 289 states, 289 states have (on average 3.027681660899654) internal successors, (875), 288 states have internal predecessors, (875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 586 [2024-11-18 13:24:34,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 13:24:34,525 INFO L225 Difference]: With dead ends: 6330 [2024-11-18 13:24:34,525 INFO L226 Difference]: Without dead ends: 4600 [2024-11-18 13:24:34,531 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1362 GetRequests, 980 SyntacticMatches, 0 SemanticMatches, 382 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54337 ImplicationChecksByTransitivity, 20.2s TimeCoverageRelationStatistics Valid=55392, Invalid=91680, Unknown=0, NotChecked=0, Total=147072 [2024-11-18 13:24:34,532 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 1385 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 1029 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1385 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 1031 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1029 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-18 13:24:34,532 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1385 Valid, 48 Invalid, 1031 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1029 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-18 13:24:34,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4600 states. [2024-11-18 13:24:34,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4600 to 4600. [2024-11-18 13:24:34,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4600 states, 4599 states have (on average 1.3322461404653185) internal successors, (6127), 4599 states have internal predecessors, (6127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 13:24:34,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4600 states to 4600 states and 6127 transitions. [2024-11-18 13:24:34,683 INFO L78 Accepts]: Start accepts. Automaton has 4600 states and 6127 transitions. Word has length 586 [2024-11-18 13:24:34,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 13:24:34,683 INFO L471 AbstractCegarLoop]: Abstraction has 4600 states and 6127 transitions. [2024-11-18 13:24:34,684 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 289 states, 289 states have (on average 3.027681660899654) internal successors, (875), 288 states have internal predecessors, (875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 13:24:34,684 INFO L276 IsEmpty]: Start isEmpty. Operand 4600 states and 6127 transitions. [2024-11-18 13:24:34,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1163 [2024-11-18 13:24:34,693 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 13:24:34,694 INFO L215 NwaCegarLoop]: trace histogram [380, 380, 378, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 13:24:34,707 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-18 13:24:34,894 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 13:24:34,894 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 13:24:34,895 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 13:24:34,895 INFO L85 PathProgramCache]: Analyzing trace with hash -845797276, now seen corresponding path program 2 times [2024-11-18 13:24:34,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 13:24:34,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405004179] [2024-11-18 13:24:34,895 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-18 13:24:34,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 13:24:35,228 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-18 13:24:35,229 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 13:24:59,027 INFO L134 CoverageAnalysis]: Checked inductivity of 216798 backedges. 162736 proven. 0 refuted. 0 times theorem prover too weak. 54062 trivial. 0 not checked. [2024-11-18 13:24:59,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 13:24:59,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405004179] [2024-11-18 13:24:59,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405004179] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-18 13:24:59,027 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-18 13:24:59,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [192] imperfect sequences [] total 192 [2024-11-18 13:24:59,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583892332] [2024-11-18 13:24:59,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 13:24:59,028 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 192 states [2024-11-18 13:24:59,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 13:24:59,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 192 interpolants. [2024-11-18 13:24:59,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18336, Invalid=18336, Unknown=0, NotChecked=0, Total=36672 [2024-11-18 13:24:59,034 INFO L87 Difference]: Start difference. First operand 4600 states and 6127 transitions. Second operand has 192 states, 192 states have (on average 3.078125) internal successors, (591), 192 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)