./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops-crafted-1/nested3-1_abstracted.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/nested3-1_abstracted.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 898ef25fdb2ae04f56304d500631f410c196b9a77fbfba6f83248dcfc33b301f --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-3061b6d-m [2024-11-18 13:22:52,591 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-18 13:22:52,668 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-18 13:22:52,674 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-18 13:22:52,675 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-18 13:22:52,713 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-18 13:22:52,713 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-18 13:22:52,714 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-18 13:22:52,714 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-18 13:22:52,715 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-18 13:22:52,716 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-18 13:22:52,716 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-18 13:22:52,717 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-18 13:22:52,719 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-18 13:22:52,719 INFO L153 SettingsManager]: * Use SBE=true [2024-11-18 13:22:52,719 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-18 13:22:52,720 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-18 13:22:52,720 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-18 13:22:52,720 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-18 13:22:52,720 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-18 13:22:52,721 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-18 13:22:52,721 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-18 13:22:52,722 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-18 13:22:52,722 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-18 13:22:52,724 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-18 13:22:52,724 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-18 13:22:52,725 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-18 13:22:52,725 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-18 13:22:52,725 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-18 13:22:52,725 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-18 13:22:52,725 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-18 13:22:52,726 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-18 13:22:52,726 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-18 13:22:52,726 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-18 13:22:52,726 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-18 13:22:52,726 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-18 13:22:52,727 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-18 13:22:52,727 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-18 13:22:52,727 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-18 13:22:52,730 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-18 13:22:52,730 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-18 13:22:52,731 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-18 13:22:52,731 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 898ef25fdb2ae04f56304d500631f410c196b9a77fbfba6f83248dcfc33b301f [2024-11-18 13:22:52,972 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-18 13:22:52,999 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-18 13:22:53,001 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-18 13:22:53,002 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-18 13:22:53,002 INFO L274 PluginConnector]: CDTParser initialized [2024-11-18 13:22:53,003 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops-crafted-1/nested3-1_abstracted.c [2024-11-18 13:22:54,277 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-18 13:22:54,437 INFO L384 CDTParser]: Found 1 translation units. [2024-11-18 13:22:54,439 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/nested3-1_abstracted.c [2024-11-18 13:22:54,449 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4856b25fc/881926da8eea409a896530931b2771d6/FLAGcff7382f7 [2024-11-18 13:22:54,845 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4856b25fc/881926da8eea409a896530931b2771d6 [2024-11-18 13:22:54,848 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-18 13:22:54,849 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-18 13:22:54,852 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-18 13:22:54,853 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-18 13:22:54,857 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-18 13:22:54,858 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 01:22:54" (1/1) ... [2024-11-18 13:22:54,859 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e67d454 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:22:54, skipping insertion in model container [2024-11-18 13:22:54,859 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 01:22:54" (1/1) ... [2024-11-18 13:22:54,875 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-18 13:22:55,012 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/nested3-1_abstracted.c[739,752] [2024-11-18 13:22:55,028 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-18 13:22:55,035 INFO L200 MainTranslator]: Completed pre-run [2024-11-18 13:22:55,044 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/nested3-1_abstracted.c[739,752] [2024-11-18 13:22:55,047 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-18 13:22:55,060 INFO L204 MainTranslator]: Completed translation [2024-11-18 13:22:55,061 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:22:55 WrapperNode [2024-11-18 13:22:55,061 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-18 13:22:55,062 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-18 13:22:55,062 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-18 13:22:55,062 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-18 13:22:55,068 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:22:55" (1/1) ... [2024-11-18 13:22:55,074 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:22:55" (1/1) ... [2024-11-18 13:22:55,091 INFO L138 Inliner]: procedures = 20, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 46 [2024-11-18 13:22:55,091 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-18 13:22:55,092 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-18 13:22:55,092 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-18 13:22:55,092 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-18 13:22:55,099 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:22:55" (1/1) ... [2024-11-18 13:22:55,100 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:22:55" (1/1) ... [2024-11-18 13:22:55,100 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:22:55" (1/1) ... [2024-11-18 13:22:55,113 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 13:22:55,114 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:22:55" (1/1) ... [2024-11-18 13:22:55,114 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:22:55" (1/1) ... [2024-11-18 13:22:55,116 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:22:55" (1/1) ... [2024-11-18 13:22:55,119 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:22:55" (1/1) ... [2024-11-18 13:22:55,119 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:22:55" (1/1) ... [2024-11-18 13:22:55,120 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:22:55" (1/1) ... [2024-11-18 13:22:55,121 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-18 13:22:55,121 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-18 13:22:55,122 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-18 13:22:55,122 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-18 13:22:55,122 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:22:55" (1/1) ... [2024-11-18 13:22:55,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-18 13:22:55,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 13:22:55,147 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 13:22:55,149 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 13:22:55,192 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-18 13:22:55,192 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-18 13:22:55,193 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-18 13:22:55,193 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-18 13:22:55,193 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-18 13:22:55,194 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-18 13:22:55,241 INFO L238 CfgBuilder]: Building ICFG [2024-11-18 13:22:55,242 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-18 13:22:55,373 INFO L? ?]: Removed 7 outVars from TransFormulas that were not future-live. [2024-11-18 13:22:55,373 INFO L287 CfgBuilder]: Performing block encoding [2024-11-18 13:22:55,384 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-18 13:22:55,384 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-18 13:22:55,385 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 01:22:55 BoogieIcfgContainer [2024-11-18 13:22:55,385 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-18 13:22:55,387 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-18 13:22:55,387 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-18 13:22:55,390 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-18 13:22:55,390 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 01:22:54" (1/3) ... [2024-11-18 13:22:55,391 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15ef32d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 01:22:55, skipping insertion in model container [2024-11-18 13:22:55,391 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:22:55" (2/3) ... [2024-11-18 13:22:55,391 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15ef32d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 01:22:55, skipping insertion in model container [2024-11-18 13:22:55,391 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 01:22:55" (3/3) ... [2024-11-18 13:22:55,392 INFO L112 eAbstractionObserver]: Analyzing ICFG nested3-1_abstracted.c [2024-11-18 13:22:55,406 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-18 13:22:55,406 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-18 13:22:55,455 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-18 13:22:55,464 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;@d61c938, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-18 13:22:55,464 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-18 13:22:55,469 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 17 states have (on average 1.588235294117647) internal successors, (27), 18 states have internal predecessors, (27), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-18 13:22:55,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-18 13:22:55,479 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 13:22:55,480 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-18 13:22:55,483 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 13:22:55,489 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 13:22:55,489 INFO L85 PathProgramCache]: Analyzing trace with hash 1851309253, now seen corresponding path program 1 times [2024-11-18 13:22:55,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 13:22:55,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14059968] [2024-11-18 13:22:55,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 13:22:55,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 13:22:55,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 13:22:55,677 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 13:22:55,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 13:22:55,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14059968] [2024-11-18 13:22:55,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14059968] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-18 13:22:55,682 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-18 13:22:55,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-18 13:22:55,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864980189] [2024-11-18 13:22:55,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 13:22:55,696 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-18 13:22:55,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 13:22:55,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-18 13:22:55,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-18 13:22:55,727 INFO L87 Difference]: Start difference. First operand has 23 states, 17 states have (on average 1.588235294117647) internal successors, (27), 18 states have internal predecessors, (27), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 13:22:55,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 13:22:55,743 INFO L93 Difference]: Finished difference Result 44 states and 67 transitions. [2024-11-18 13:22:55,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-18 13:22:55,745 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-11-18 13:22:55,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 13:22:55,752 INFO L225 Difference]: With dead ends: 44 [2024-11-18 13:22:55,752 INFO L226 Difference]: Without dead ends: 19 [2024-11-18 13:22:55,754 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 13:22:55,759 INFO L432 NwaCegarLoop]: 28 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, 28 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 13:22:55,760 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-18 13:22:55,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2024-11-18 13:22:55,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2024-11-18 13:22:55,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 15 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-18 13:22:55,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2024-11-18 13:22:55,786 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 7 [2024-11-18 13:22:55,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 13:22:55,786 INFO L471 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2024-11-18 13:22:55,786 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 13:22:55,787 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2024-11-18 13:22:55,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-18 13:22:55,788 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 13:22:55,788 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-18 13:22:55,788 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-18 13:22:55,788 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 13:22:55,789 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 13:22:55,789 INFO L85 PathProgramCache]: Analyzing trace with hash 1810674329, now seen corresponding path program 1 times [2024-11-18 13:22:55,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 13:22:55,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476107500] [2024-11-18 13:22:55,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 13:22:55,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 13:22:55,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 13:22:55,906 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 13:22:55,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 13:22:55,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476107500] [2024-11-18 13:22:55,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476107500] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-18 13:22:55,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-18 13:22:55,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-18 13:22:55,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106448090] [2024-11-18 13:22:55,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 13:22:55,909 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-18 13:22:55,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 13:22:55,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-18 13:22:55,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-18 13:22:55,910 INFO L87 Difference]: Start difference. First operand 19 states and 24 transitions. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 13:22:55,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 13:22:55,933 INFO L93 Difference]: Finished difference Result 36 states and 46 transitions. [2024-11-18 13:22:55,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-18 13:22:55,937 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-11-18 13:22:55,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 13:22:55,937 INFO L225 Difference]: With dead ends: 36 [2024-11-18 13:22:55,938 INFO L226 Difference]: Without dead ends: 29 [2024-11-18 13:22:55,938 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 13:22:55,939 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 10 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-18 13:22:55,939 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 44 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-18 13:22:55,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-11-18 13:22:55,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 20. [2024-11-18 13:22:55,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 16 states have internal predecessors, (20), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-18 13:22:55,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 25 transitions. [2024-11-18 13:22:55,947 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 25 transitions. Word has length 7 [2024-11-18 13:22:55,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 13:22:55,947 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 25 transitions. [2024-11-18 13:22:55,948 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 13:22:55,948 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 25 transitions. [2024-11-18 13:22:55,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-18 13:22:55,948 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 13:22:55,948 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 13:22:55,949 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-18 13:22:55,949 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 13:22:55,949 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 13:22:55,950 INFO L85 PathProgramCache]: Analyzing trace with hash 301331359, now seen corresponding path program 1 times [2024-11-18 13:22:55,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 13:22:55,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487192249] [2024-11-18 13:22:55,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 13:22:55,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 13:22:55,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 13:22:56,033 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 13:22:56,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 13:22:56,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487192249] [2024-11-18 13:22:56,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487192249] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-18 13:22:56,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-18 13:22:56,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-18 13:22:56,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437324418] [2024-11-18 13:22:56,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 13:22:56,035 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-18 13:22:56,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 13:22:56,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-18 13:22:56,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-18 13:22:56,037 INFO L87 Difference]: Start difference. First operand 20 states and 25 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 13:22:56,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 13:22:56,052 INFO L93 Difference]: Finished difference Result 44 states and 58 transitions. [2024-11-18 13:22:56,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-18 13:22:56,053 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-11-18 13:22:56,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 13:22:56,053 INFO L225 Difference]: With dead ends: 44 [2024-11-18 13:22:56,053 INFO L226 Difference]: Without dead ends: 27 [2024-11-18 13:22:56,054 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 13:22:56,055 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 7 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-18 13:22:56,055 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 42 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-18 13:22:56,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-11-18 13:22:56,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 21. [2024-11-18 13:22:56,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.3125) internal successors, (21), 17 states have internal predecessors, (21), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-18 13:22:56,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2024-11-18 13:22:56,060 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 8 [2024-11-18 13:22:56,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 13:22:56,060 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2024-11-18 13:22:56,060 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 13:22:56,060 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2024-11-18 13:22:56,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-18 13:22:56,061 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 13:22:56,061 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 13:22:56,061 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-18 13:22:56,063 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 13:22:56,063 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 13:22:56,064 INFO L85 PathProgramCache]: Analyzing trace with hash 781215030, now seen corresponding path program 1 times [2024-11-18 13:22:56,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 13:22:56,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553542688] [2024-11-18 13:22:56,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 13:22:56,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 13:22:56,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 13:22:56,133 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 13:22:56,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 13:22:56,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553542688] [2024-11-18 13:22:56,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553542688] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-18 13:22:56,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-18 13:22:56,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-18 13:22:56,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562447001] [2024-11-18 13:22:56,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 13:22:56,135 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-18 13:22:56,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 13:22:56,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-18 13:22:56,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-18 13:22:56,138 INFO L87 Difference]: Start difference. First operand 21 states and 26 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 13:22:56,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 13:22:56,155 INFO L93 Difference]: Finished difference Result 39 states and 49 transitions. [2024-11-18 13:22:56,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-18 13:22:56,155 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2024-11-18 13:22:56,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 13:22:56,156 INFO L225 Difference]: With dead ends: 39 [2024-11-18 13:22:56,156 INFO L226 Difference]: Without dead ends: 21 [2024-11-18 13:22:56,156 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 13:22:56,179 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-18 13:22:56,179 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 39 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-18 13:22:56,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2024-11-18 13:22:56,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2024-11-18 13:22:56,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-18 13:22:56,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2024-11-18 13:22:56,185 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 9 [2024-11-18 13:22:56,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 13:22:56,187 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2024-11-18 13:22:56,187 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 13:22:56,187 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2024-11-18 13:22:56,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-18 13:22:56,188 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 13:22:56,188 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 13:22:56,188 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-18 13:22:56,188 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 13:22:56,188 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 13:22:56,188 INFO L85 PathProgramCache]: Analyzing trace with hash -2077858032, now seen corresponding path program 1 times [2024-11-18 13:22:56,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 13:22:56,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737239138] [2024-11-18 13:22:56,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 13:22:56,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 13:22:56,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 13:22:56,428 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 13:22:56,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 13:22:56,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737239138] [2024-11-18 13:22:56,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737239138] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-18 13:22:56,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-18 13:22:56,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-18 13:22:56,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907267593] [2024-11-18 13:22:56,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 13:22:56,430 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-18 13:22:56,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 13:22:56,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-18 13:22:56,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-18 13:22:56,431 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 13:22:56,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 13:22:56,538 INFO L93 Difference]: Finished difference Result 44 states and 52 transitions. [2024-11-18 13:22:56,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-18 13:22:56,540 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 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 13:22:56,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 13:22:56,540 INFO L225 Difference]: With dead ends: 44 [2024-11-18 13:22:56,540 INFO L226 Difference]: Without dead ends: 26 [2024-11-18 13:22:56,540 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-11-18 13:22:56,541 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 14 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-18 13:22:56,542 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 74 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-18 13:22:56,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2024-11-18 13:22:56,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2024-11-18 13:22:56,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 20 states have internal predecessors, (22), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-18 13:22:56,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2024-11-18 13:22:56,548 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 12 [2024-11-18 13:22:56,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 13:22:56,548 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2024-11-18 13:22:56,549 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 13:22:56,549 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2024-11-18 13:22:56,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-18 13:22:56,549 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 13:22:56,550 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 13:22:56,550 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-18 13:22:56,550 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 13:22:56,550 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 13:22:56,550 INFO L85 PathProgramCache]: Analyzing trace with hash -648681359, now seen corresponding path program 1 times [2024-11-18 13:22:56,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 13:22:56,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572384685] [2024-11-18 13:22:56,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 13:22:56,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 13:22:56,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 13:22:56,639 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 13:22:56,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 13:22:56,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572384685] [2024-11-18 13:22:56,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572384685] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 13:22:56,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046901645] [2024-11-18 13:22:56,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 13:22:56,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 13:22:56,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 13:22:56,645 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 13:22:56,646 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 13:22:56,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 13:22:56,694 INFO L255 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-18 13:22:56,698 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 13:22:56,747 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 13:22:56,747 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 13:22:56,812 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 13:22:56,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046901645] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 13:22:56,813 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 13:22:56,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 11 [2024-11-18 13:22:56,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74885289] [2024-11-18 13:22:56,813 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 13:22:56,813 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-18 13:22:56,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 13:22:56,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-18 13:22:56,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-11-18 13:22:56,814 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 9 states have internal predecessors, (30), 5 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-18 13:22:56,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 13:22:56,912 INFO L93 Difference]: Finished difference Result 75 states and 86 transitions. [2024-11-18 13:22:56,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-18 13:22:56,913 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 9 states have internal predecessors, (30), 5 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2024-11-18 13:22:56,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 13:22:56,913 INFO L225 Difference]: With dead ends: 75 [2024-11-18 13:22:56,913 INFO L226 Difference]: Without dead ends: 53 [2024-11-18 13:22:56,914 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-11-18 13:22:56,914 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 18 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-18 13:22:56,915 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 230 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-18 13:22:56,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-11-18 13:22:56,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 44. [2024-11-18 13:22:56,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 36 states have internal predecessors, (38), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-18 13:22:56,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 49 transitions. [2024-11-18 13:22:56,923 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 49 transitions. Word has length 19 [2024-11-18 13:22:56,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 13:22:56,923 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 49 transitions. [2024-11-18 13:22:56,923 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 9 states have internal predecessors, (30), 5 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-18 13:22:56,923 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 49 transitions. [2024-11-18 13:22:56,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-18 13:22:56,923 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 13:22:56,923 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 13:22:56,937 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 13:22:57,127 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-18 13:22:57,128 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 13:22:57,128 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 13:22:57,128 INFO L85 PathProgramCache]: Analyzing trace with hash -1309729697, now seen corresponding path program 2 times [2024-11-18 13:22:57,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 13:22:57,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129711500] [2024-11-18 13:22:57,128 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-18 13:22:57,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 13:22:57,152 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-18 13:22:57,152 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 13:22:57,240 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-18 13:22:57,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 13:22:57,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129711500] [2024-11-18 13:22:57,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129711500] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 13:22:57,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671783335] [2024-11-18 13:22:57,241 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-18 13:22:57,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 13:22:57,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 13:22:57,247 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 13:22:57,252 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 13:22:57,292 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-18 13:22:57,292 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 13:22:57,293 INFO L255 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-18 13:22:57,294 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 13:22:57,321 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-18 13:22:57,321 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 13:22:57,395 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-18 13:22:57,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671783335] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 13:22:57,395 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 13:22:57,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2024-11-18 13:22:57,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329540395] [2024-11-18 13:22:57,396 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 13:22:57,396 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-18 13:22:57,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 13:22:57,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-18 13:22:57,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2024-11-18 13:22:57,399 INFO L87 Difference]: Start difference. First operand 44 states and 49 transitions. Second operand has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 states have internal predecessors, (38), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-18 13:22:57,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 13:22:57,484 INFO L93 Difference]: Finished difference Result 113 states and 131 transitions. [2024-11-18 13:22:57,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-18 13:22:57,486 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 states have internal predecessors, (38), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 30 [2024-11-18 13:22:57,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 13:22:57,488 INFO L225 Difference]: With dead ends: 113 [2024-11-18 13:22:57,488 INFO L226 Difference]: Without dead ends: 72 [2024-11-18 13:22:57,488 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2024-11-18 13:22:57,489 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 20 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-18 13:22:57,489 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 143 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-18 13:22:57,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2024-11-18 13:22:57,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2024-11-18 13:22:57,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 58 states have (on average 1.0689655172413792) internal successors, (62), 60 states have internal predecessors, (62), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-18 13:22:57,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 81 transitions. [2024-11-18 13:22:57,510 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 81 transitions. Word has length 30 [2024-11-18 13:22:57,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 13:22:57,510 INFO L471 AbstractCegarLoop]: Abstraction has 72 states and 81 transitions. [2024-11-18 13:22:57,510 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 states have internal predecessors, (38), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-18 13:22:57,510 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 81 transitions. [2024-11-18 13:22:57,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-11-18 13:22:57,511 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 13:22:57,511 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 13:22:57,527 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-18 13:22:57,712 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,SelfDestructingSolverStorable6 [2024-11-18 13:22:57,712 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 13:22:57,713 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 13:22:57,713 INFO L85 PathProgramCache]: Analyzing trace with hash -339984929, now seen corresponding path program 3 times [2024-11-18 13:22:57,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 13:22:57,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637158172] [2024-11-18 13:22:57,713 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-18 13:22:57,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 13:22:57,733 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-18 13:22:57,733 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 13:22:57,821 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2024-11-18 13:22:57,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 13:22:57,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637158172] [2024-11-18 13:22:57,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637158172] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-18 13:22:57,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-18 13:22:57,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-18 13:22:57,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219352464] [2024-11-18 13:22:57,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 13:22:57,822 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-18 13:22:57,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 13:22:57,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-18 13:22:57,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-18 13:22:57,822 INFO L87 Difference]: Start difference. First operand 72 states and 81 transitions. Second operand has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-18 13:22:57,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 13:22:57,866 INFO L93 Difference]: Finished difference Result 78 states and 86 transitions. [2024-11-18 13:22:57,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-18 13:22:57,866 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 74 [2024-11-18 13:22:57,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 13:22:57,868 INFO L225 Difference]: With dead ends: 78 [2024-11-18 13:22:57,868 INFO L226 Difference]: Without dead ends: 74 [2024-11-18 13:22:57,868 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-11-18 13:22:57,869 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 8 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-18 13:22:57,869 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 80 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-18 13:22:57,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2024-11-18 13:22:57,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 62. [2024-11-18 13:22:57,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 51 states have (on average 1.0392156862745099) internal successors, (53), 51 states have internal predecessors, (53), 8 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-18 13:22:57,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 68 transitions. [2024-11-18 13:22:57,884 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 68 transitions. Word has length 74 [2024-11-18 13:22:57,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 13:22:57,885 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 68 transitions. [2024-11-18 13:22:57,885 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-18 13:22:57,885 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 68 transitions. [2024-11-18 13:22:57,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2024-11-18 13:22:57,886 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 13:22:57,886 INFO L215 NwaCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 13:22:57,886 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-18 13:22:57,886 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 13:22:57,887 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 13:22:57,887 INFO L85 PathProgramCache]: Analyzing trace with hash 1552769428, now seen corresponding path program 1 times [2024-11-18 13:22:57,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 13:22:57,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429803114] [2024-11-18 13:22:57,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 13:22:57,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 13:22:57,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 13:22:58,093 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 15 proven. 111 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-11-18 13:22:58,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 13:22:58,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429803114] [2024-11-18 13:22:58,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429803114] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 13:22:58,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054581533] [2024-11-18 13:22:58,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 13:22:58,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 13:22:58,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 13:22:58,095 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 13:22:58,096 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 13:22:58,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 13:22:58,145 INFO L255 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-18 13:22:58,147 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 13:22:58,244 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 14 proven. 42 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2024-11-18 13:22:58,244 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 13:22:58,463 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 54 proven. 2 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2024-11-18 13:22:58,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054581533] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 13:22:58,464 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 13:22:58,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 6] total 17 [2024-11-18 13:22:58,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348800474] [2024-11-18 13:22:58,464 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 13:22:58,465 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-18 13:22:58,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 13:22:58,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-18 13:22:58,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2024-11-18 13:22:58,467 INFO L87 Difference]: Start difference. First operand 62 states and 68 transitions. Second operand has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 11 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13) [2024-11-18 13:22:59,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 13:22:59,127 INFO L93 Difference]: Finished difference Result 311 states and 362 transitions. [2024-11-18 13:22:59,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-11-18 13:22:59,128 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 11 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13) Word has length 81 [2024-11-18 13:22:59,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 13:22:59,130 INFO L225 Difference]: With dead ends: 311 [2024-11-18 13:22:59,130 INFO L226 Difference]: Without dead ends: 252 [2024-11-18 13:22:59,131 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=402, Invalid=1578, Unknown=0, NotChecked=0, Total=1980 [2024-11-18 13:22:59,132 INFO L432 NwaCegarLoop]: 87 mSDtfsCounter, 227 mSDsluCounter, 626 mSDsCounter, 0 mSdLazyCounter, 381 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 713 SdHoareTripleChecker+Invalid, 423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-18 13:22:59,132 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [231 Valid, 713 Invalid, 423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 381 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-18 13:22:59,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2024-11-18 13:22:59,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 228. [2024-11-18 13:22:59,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 192 states have (on average 1.0260416666666667) internal successors, (197), 192 states have internal predecessors, (197), 33 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2024-11-18 13:22:59,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 262 transitions. [2024-11-18 13:22:59,171 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 262 transitions. Word has length 81 [2024-11-18 13:22:59,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 13:22:59,171 INFO L471 AbstractCegarLoop]: Abstraction has 228 states and 262 transitions. [2024-11-18 13:22:59,171 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 11 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13) [2024-11-18 13:22:59,171 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 262 transitions. [2024-11-18 13:22:59,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 348 [2024-11-18 13:22:59,175 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 13:22:59,175 INFO L215 NwaCegarLoop]: trace histogram [33, 32, 32, 28, 28, 28, 28, 28, 28, 28, 28, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2024-11-18 13:22:59,192 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-18 13:22:59,376 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 13:22:59,376 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 13:22:59,377 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 13:22:59,377 INFO L85 PathProgramCache]: Analyzing trace with hash 1967935961, now seen corresponding path program 2 times [2024-11-18 13:22:59,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 13:22:59,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124033743] [2024-11-18 13:22:59,377 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-18 13:22:59,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 13:22:59,495 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-18 13:22:59,496 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 13:23:00,100 INFO L134 CoverageAnalysis]: Checked inductivity of 4834 backedges. 1142 proven. 154 refuted. 0 times theorem prover too weak. 3538 trivial. 0 not checked. [2024-11-18 13:23:00,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 13:23:00,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124033743] [2024-11-18 13:23:00,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124033743] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 13:23:00,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413773880] [2024-11-18 13:23:00,101 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-18 13:23:00,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 13:23:00,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 13:23:00,103 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 13:23:00,104 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 13:23:00,241 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-18 13:23:00,242 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 13:23:00,245 INFO L255 TraceCheckSpWp]: Trace formula consists of 659 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-18 13:23:00,252 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 13:23:00,662 INFO L134 CoverageAnalysis]: Checked inductivity of 4834 backedges. 64 proven. 2303 refuted. 0 times theorem prover too weak. 2467 trivial. 0 not checked. [2024-11-18 13:23:00,663 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 13:23:01,611 INFO L134 CoverageAnalysis]: Checked inductivity of 4834 backedges. 151 proven. 2216 refuted. 0 times theorem prover too weak. 2467 trivial. 0 not checked. [2024-11-18 13:23:01,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413773880] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 13:23:01,611 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 13:23:01,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 30 [2024-11-18 13:23:01,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671995854] [2024-11-18 13:23:01,612 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 13:23:01,612 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-18 13:23:01,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 13:23:01,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-18 13:23:01,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=686, Unknown=0, NotChecked=0, Total=870 [2024-11-18 13:23:01,614 INFO L87 Difference]: Start difference. First operand 228 states and 262 transitions. Second operand has 30 states, 30 states have (on average 6.266666666666667) internal successors, (188), 30 states have internal predecessors, (188), 24 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (33), 24 states have call predecessors, (33), 24 states have call successors, (33) [2024-11-18 13:23:04,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 13:23:04,642 INFO L93 Difference]: Finished difference Result 851 states and 1001 transitions. [2024-11-18 13:23:04,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2024-11-18 13:23:04,643 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 6.266666666666667) internal successors, (188), 30 states have internal predecessors, (188), 24 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (33), 24 states have call predecessors, (33), 24 states have call successors, (33) Word has length 347 [2024-11-18 13:23:04,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 13:23:04,645 INFO L225 Difference]: With dead ends: 851 [2024-11-18 13:23:04,646 INFO L226 Difference]: Without dead ends: 676 [2024-11-18 13:23:04,650 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 786 GetRequests, 675 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4341 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2157, Invalid=10499, Unknown=0, NotChecked=0, Total=12656 [2024-11-18 13:23:04,650 INFO L432 NwaCegarLoop]: 234 mSDtfsCounter, 449 mSDsluCounter, 2529 mSDsCounter, 0 mSdLazyCounter, 1718 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 453 SdHoareTripleChecker+Valid, 2763 SdHoareTripleChecker+Invalid, 1805 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 1718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-18 13:23:04,650 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [453 Valid, 2763 Invalid, 1805 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 1718 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-18 13:23:04,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2024-11-18 13:23:04,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 616. [2024-11-18 13:23:04,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 616 states, 522 states have (on average 1.0210727969348659) internal successors, (533), 522 states have internal predecessors, (533), 91 states have call successors, (91), 3 states have call predecessors, (91), 2 states have return successors, (90), 90 states have call predecessors, (90), 90 states have call successors, (90) [2024-11-18 13:23:04,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 616 states to 616 states and 714 transitions. [2024-11-18 13:23:04,699 INFO L78 Accepts]: Start accepts. Automaton has 616 states and 714 transitions. Word has length 347 [2024-11-18 13:23:04,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 13:23:04,700 INFO L471 AbstractCegarLoop]: Abstraction has 616 states and 714 transitions. [2024-11-18 13:23:04,700 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 6.266666666666667) internal successors, (188), 30 states have internal predecessors, (188), 24 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (33), 24 states have call predecessors, (33), 24 states have call successors, (33) [2024-11-18 13:23:04,700 INFO L276 IsEmpty]: Start isEmpty. Operand 616 states and 714 transitions. [2024-11-18 13:23:04,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 968 [2024-11-18 13:23:04,714 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 13:23:04,714 INFO L215 NwaCegarLoop]: trace histogram [91, 90, 90, 80, 80, 80, 80, 80, 80, 80, 80, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1] [2024-11-18 13:23:04,728 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 13:23:04,914 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 13:23:04,915 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 13:23:04,915 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 13:23:04,915 INFO L85 PathProgramCache]: Analyzing trace with hash 1157803239, now seen corresponding path program 3 times [2024-11-18 13:23:04,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 13:23:04,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802955693] [2024-11-18 13:23:04,915 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-18 13:23:04,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 13:23:04,996 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2024-11-18 13:23:04,996 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 13:23:05,183 INFO L134 CoverageAnalysis]: Checked inductivity of 39310 backedges. 4393 proven. 204 refuted. 0 times theorem prover too weak. 34713 trivial. 0 not checked. [2024-11-18 13:23:05,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 13:23:05,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802955693] [2024-11-18 13:23:05,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802955693] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 13:23:05,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775095935] [2024-11-18 13:23:05,184 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-18 13:23:05,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 13:23:05,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 13:23:05,186 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 13:23:05,187 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 13:23:05,320 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2024-11-18 13:23:05,321 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 13:23:05,322 INFO L255 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-18 13:23:05,333 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 13:23:05,439 INFO L134 CoverageAnalysis]: Checked inductivity of 39310 backedges. 4747 proven. 204 refuted. 0 times theorem prover too weak. 34359 trivial. 0 not checked. [2024-11-18 13:23:05,439 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 13:23:05,909 INFO L134 CoverageAnalysis]: Checked inductivity of 39310 backedges. 4393 proven. 204 refuted. 0 times theorem prover too weak. 34713 trivial. 0 not checked. [2024-11-18 13:23:05,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775095935] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 13:23:05,910 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 13:23:05,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2024-11-18 13:23:05,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077246191] [2024-11-18 13:23:05,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 13:23:05,912 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-18 13:23:05,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 13:23:05,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-18 13:23:05,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=282, Unknown=0, NotChecked=0, Total=420 [2024-11-18 13:23:05,913 INFO L87 Difference]: Start difference. First operand 616 states and 714 transitions. Second operand has 21 states, 21 states have (on average 5.857142857142857) internal successors, (123), 21 states have internal predecessors, (123), 18 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 18 states have call predecessors, (20), 18 states have call successors, (20) [2024-11-18 13:23:07,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 13:23:07,079 INFO L93 Difference]: Finished difference Result 1872 states and 2259 transitions. [2024-11-18 13:23:07,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-18 13:23:07,079 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.857142857142857) internal successors, (123), 21 states have internal predecessors, (123), 18 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 18 states have call predecessors, (20), 18 states have call successors, (20) Word has length 967 [2024-11-18 13:23:07,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 13:23:07,086 INFO L225 Difference]: With dead ends: 1872 [2024-11-18 13:23:07,086 INFO L226 Difference]: Without dead ends: 1316 [2024-11-18 13:23:07,088 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1952 GetRequests, 1925 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=306, Invalid=506, Unknown=0, NotChecked=0, Total=812 [2024-11-18 13:23:07,088 INFO L432 NwaCegarLoop]: 68 mSDtfsCounter, 50 mSDsluCounter, 555 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 623 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-18 13:23:07,089 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 623 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-18 13:23:07,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1316 states. [2024-11-18 13:23:07,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1316 to 1316. [2024-11-18 13:23:07,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1316 states, 1122 states have (on average 1.0098039215686274) internal successors, (1133), 1122 states have internal predecessors, (1133), 191 states have call successors, (191), 3 states have call predecessors, (191), 2 states have return successors, (190), 190 states have call predecessors, (190), 190 states have call successors, (190) [2024-11-18 13:23:07,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1316 states to 1316 states and 1514 transitions. [2024-11-18 13:23:07,299 INFO L78 Accepts]: Start accepts. Automaton has 1316 states and 1514 transitions. Word has length 967 [2024-11-18 13:23:07,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 13:23:07,299 INFO L471 AbstractCegarLoop]: Abstraction has 1316 states and 1514 transitions. [2024-11-18 13:23:07,299 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.857142857142857) internal successors, (123), 21 states have internal predecessors, (123), 18 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 18 states have call predecessors, (20), 18 states have call successors, (20) [2024-11-18 13:23:07,299 INFO L276 IsEmpty]: Start isEmpty. Operand 1316 states and 1514 transitions. [2024-11-18 13:23:07,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2068 [2024-11-18 13:23:07,388 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 13:23:07,389 INFO L215 NwaCegarLoop]: trace histogram [191, 190, 190, 180, 180, 180, 180, 180, 180, 180, 180, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1] [2024-11-18 13:23:07,407 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 13:23:07,593 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,SelfDestructingSolverStorable10 [2024-11-18 13:23:07,593 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 13:23:07,594 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 13:23:07,594 INFO L85 PathProgramCache]: Analyzing trace with hash -1700933337, now seen corresponding path program 4 times [2024-11-18 13:23:07,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 13:23:07,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178125545] [2024-11-18 13:23:07,595 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-18 13:23:07,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 13:23:08,841 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-18 13:23:08,842 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 13:23:12,390 INFO L134 CoverageAnalysis]: Checked inductivity of 186960 backedges. 21153 proven. 1089 refuted. 0 times theorem prover too weak. 164718 trivial. 0 not checked. [2024-11-18 13:23:12,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 13:23:12,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178125545] [2024-11-18 13:23:12,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178125545] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 13:23:12,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273237045] [2024-11-18 13:23:12,391 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-18 13:23:12,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 13:23:12,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 13:23:12,393 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 13:23:12,394 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 13:23:12,954 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-18 13:23:12,954 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 13:23:12,971 INFO L255 TraceCheckSpWp]: Trace formula consists of 3789 conjuncts, 46 conjuncts are in the unsatisfiable core [2024-11-18 13:23:12,999 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 13:23:14,804 INFO L134 CoverageAnalysis]: Checked inductivity of 186960 backedges. 380 proven. 104763 refuted. 0 times theorem prover too weak. 81817 trivial. 0 not checked. [2024-11-18 13:23:14,804 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 13:23:18,341 INFO L134 CoverageAnalysis]: Checked inductivity of 186960 backedges. 948 proven. 104195 refuted. 0 times theorem prover too weak. 81817 trivial. 0 not checked. [2024-11-18 13:23:18,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273237045] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 13:23:18,342 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 13:23:18,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 24, 24] total 65 [2024-11-18 13:23:18,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477729499] [2024-11-18 13:23:18,342 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 13:23:18,344 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2024-11-18 13:23:18,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 13:23:18,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2024-11-18 13:23:18,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=673, Invalid=3487, Unknown=0, NotChecked=0, Total=4160 [2024-11-18 13:23:18,347 INFO L87 Difference]: Start difference. First operand 1316 states and 1514 transitions. Second operand has 65 states, 65 states have (on average 6.6923076923076925) internal successors, (435), 65 states have internal predecessors, (435), 60 states have call successors, (82), 2 states have call predecessors, (82), 1 states have return successors, (81), 60 states have call predecessors, (81), 60 states have call successors, (81)