./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_valuebound50.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 023d838f 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/nla-digbench-scaling/cohencu-ll_valuebound50.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 0bcbcb4a55258889434b8bf703da9ec6fb29d07a2fbacad968a5ab15e005b314 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-023d838-m [2024-11-09 22:28:51,978 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 22:28:52,057 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-09 22:28:52,062 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 22:28:52,064 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 22:28:52,089 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 22:28:52,090 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 22:28:52,090 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 22:28:52,091 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-09 22:28:52,091 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-09 22:28:52,091 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 22:28:52,092 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 22:28:52,092 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-09 22:28:52,092 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-09 22:28:52,093 INFO L153 SettingsManager]: * Use SBE=true [2024-11-09 22:28:52,093 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 22:28:52,093 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-09 22:28:52,094 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 22:28:52,094 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 22:28:52,094 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 22:28:52,094 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 22:28:52,095 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-09 22:28:52,095 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 22:28:52,095 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-09 22:28:52,096 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 22:28:52,096 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 22:28:52,096 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-09 22:28:52,096 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 22:28:52,097 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-09 22:28:52,097 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-09 22:28:52,097 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 22:28:52,098 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 22:28:52,098 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-09 22:28:52,098 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 22:28:52,098 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 22:28:52,099 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-09 22:28:52,099 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-09 22:28:52,099 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 22:28:52,099 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 22:28:52,099 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-09 22:28:52,100 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-09 22:28:52,102 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 22:28:52,102 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0bcbcb4a55258889434b8bf703da9ec6fb29d07a2fbacad968a5ab15e005b314 [2024-11-09 22:28:52,334 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 22:28:52,355 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 22:28:52,360 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 22:28:52,362 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 22:28:52,362 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 22:28:52,363 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_valuebound50.c [2024-11-09 22:28:53,698 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 22:28:53,858 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 22:28:53,858 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_valuebound50.c [2024-11-09 22:28:53,869 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b3489b467/7d9efa6bb153482bb3968af0af78a173/FLAG217f47dc6 [2024-11-09 22:28:54,264 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b3489b467/7d9efa6bb153482bb3968af0af78a173 [2024-11-09 22:28:54,266 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 22:28:54,267 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 22:28:54,268 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 22:28:54,268 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 22:28:54,273 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 22:28:54,274 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:28:54" (1/1) ... [2024-11-09 22:28:54,275 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65d3db7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:28:54, skipping insertion in model container [2024-11-09 22:28:54,275 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:28:54" (1/1) ... [2024-11-09 22:28:54,294 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 22:28:54,454 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/nla-digbench-scaling/cohencu-ll_valuebound50.c[588,601] [2024-11-09 22:28:54,480 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 22:28:54,487 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 22:28:54,496 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/nla-digbench-scaling/cohencu-ll_valuebound50.c[588,601] [2024-11-09 22:28:54,505 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 22:28:54,520 INFO L204 MainTranslator]: Completed translation [2024-11-09 22:28:54,521 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:28:54 WrapperNode [2024-11-09 22:28:54,521 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 22:28:54,522 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 22:28:54,522 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 22:28:54,522 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 22:28:54,528 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:28:54" (1/1) ... [2024-11-09 22:28:54,534 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:28:54" (1/1) ... [2024-11-09 22:28:54,550 INFO L138 Inliner]: procedures = 14, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 47 [2024-11-09 22:28:54,551 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 22:28:54,552 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 22:28:54,552 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 22:28:54,552 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 22:28:54,568 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:28:54" (1/1) ... [2024-11-09 22:28:54,568 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:28:54" (1/1) ... [2024-11-09 22:28:54,570 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:28:54" (1/1) ... [2024-11-09 22:28:54,589 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]. [2024-11-09 22:28:54,590 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:28:54" (1/1) ... [2024-11-09 22:28:54,590 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:28:54" (1/1) ... [2024-11-09 22:28:54,594 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:28:54" (1/1) ... [2024-11-09 22:28:54,597 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:28:54" (1/1) ... [2024-11-09 22:28:54,598 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:28:54" (1/1) ... [2024-11-09 22:28:54,599 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:28:54" (1/1) ... [2024-11-09 22:28:54,600 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 22:28:54,605 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-09 22:28:54,605 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-09 22:28:54,605 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-09 22:28:54,606 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:28:54" (1/1) ... [2024-11-09 22:28:54,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-09 22:28:54,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 22:28:54,641 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) [2024-11-09 22:28:54,644 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 [2024-11-09 22:28:54,690 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 22:28:54,690 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-09 22:28:54,691 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 22:28:54,691 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 22:28:54,691 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-09 22:28:54,691 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-09 22:28:54,752 INFO L256 CfgBuilder]: Building ICFG [2024-11-09 22:28:54,754 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 22:28:54,935 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2024-11-09 22:28:54,935 INFO L307 CfgBuilder]: Performing block encoding [2024-11-09 22:28:54,948 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 22:28:54,948 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-09 22:28:54,949 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 09.11 10:28:54 BoogieIcfgContainer [2024-11-09 22:28:54,949 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-09 22:28:54,953 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 22:28:54,954 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 22:28:54,958 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 22:28:54,958 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 10:28:54" (1/3) ... [2024-11-09 22:28:54,959 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@291c1d00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 10:28:54, skipping insertion in model container [2024-11-09 22:28:54,959 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:28:54" (2/3) ... [2024-11-09 22:28:54,960 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@291c1d00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 10:28:54, skipping insertion in model container [2024-11-09 22:28:54,961 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 09.11 10:28:54" (3/3) ... [2024-11-09 22:28:54,962 INFO L112 eAbstractionObserver]: Analyzing ICFG cohencu-ll_valuebound50.c [2024-11-09 22:28:54,978 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 22:28:54,978 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-09 22:28:55,034 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 22:28:55,040 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;@11871a99, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 22:28:55,040 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-09 22:28:55,043 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 15 states have (on average 1.4) internal successors, (21), 16 states have internal predecessors, (21), 11 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-11-09 22:28:55,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-09 22:28:55,050 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 22:28:55,050 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 22:28:55,050 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 22:28:55,055 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 22:28:55,057 INFO L85 PathProgramCache]: Analyzing trace with hash -429095500, now seen corresponding path program 1 times [2024-11-09 22:28:55,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 22:28:55,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185071959] [2024-11-09 22:28:55,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 22:28:55,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 22:28:55,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:28:55,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 22:28:55,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 22:28:55,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185071959] [2024-11-09 22:28:55,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185071959] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 22:28:55,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 22:28:55,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 22:28:55,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871692154] [2024-11-09 22:28:55,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 22:28:55,203 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-09 22:28:55,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 22:28:55,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-09 22:28:55,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-09 22:28:55,222 INFO L87 Difference]: Start difference. First operand has 29 states, 15 states have (on average 1.4) internal successors, (21), 16 states have internal predecessors, (21), 11 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 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) [2024-11-09 22:28:55,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 22:28:55,241 INFO L93 Difference]: Finished difference Result 55 states and 93 transitions. [2024-11-09 22:28:55,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-09 22:28:55,243 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 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 10 [2024-11-09 22:28:55,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 22:28:55,248 INFO L225 Difference]: With dead ends: 55 [2024-11-09 22:28:55,248 INFO L226 Difference]: Without dead ends: 25 [2024-11-09 22:28:55,251 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 [2024-11-09 22:28:55,253 INFO L432 NwaCegarLoop]: 39 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, 39 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 [2024-11-09 22:28:55,254 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 22:28:55,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2024-11-09 22:28:55,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2024-11-09 22:28:55,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 13 states have internal predecessors, (14), 11 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-09 22:28:55,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 35 transitions. [2024-11-09 22:28:55,284 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 35 transitions. Word has length 10 [2024-11-09 22:28:55,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 22:28:55,284 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 35 transitions. [2024-11-09 22:28:55,284 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 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) [2024-11-09 22:28:55,284 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 35 transitions. [2024-11-09 22:28:55,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-09 22:28:55,285 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 22:28:55,285 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 22:28:55,286 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 22:28:55,286 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 22:28:55,286 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 22:28:55,287 INFO L85 PathProgramCache]: Analyzing trace with hash 458970679, now seen corresponding path program 1 times [2024-11-09 22:28:55,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 22:28:55,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188826878] [2024-11-09 22:28:55,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 22:28:55,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 22:28:55,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:28:55,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 22:28:55,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 22:28:55,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188826878] [2024-11-09 22:28:55,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188826878] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 22:28:55,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 22:28:55,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-09 22:28:55,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094121802] [2024-11-09 22:28:55,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 22:28:55,522 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 22:28:55,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 22:28:55,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 22:28:55,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 22:28:55,523 INFO L87 Difference]: Start difference. First operand 25 states and 35 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 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) [2024-11-09 22:28:55,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 22:28:55,652 INFO L93 Difference]: Finished difference Result 32 states and 41 transitions. [2024-11-09 22:28:55,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 22:28:55,652 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 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 11 [2024-11-09 22:28:55,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 22:28:55,653 INFO L225 Difference]: With dead ends: 32 [2024-11-09 22:28:55,653 INFO L226 Difference]: Without dead ends: 29 [2024-11-09 22:28:55,654 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-09 22:28:55,655 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 4 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 22:28:55,655 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 93 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 22:28:55,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-11-09 22:28:55,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2024-11-09 22:28:55,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 16 states have internal predecessors, (17), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-09 22:28:55,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 38 transitions. [2024-11-09 22:28:55,671 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 38 transitions. Word has length 11 [2024-11-09 22:28:55,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 22:28:55,671 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 38 transitions. [2024-11-09 22:28:55,671 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 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) [2024-11-09 22:28:55,672 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 38 transitions. [2024-11-09 22:28:55,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-09 22:28:55,676 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 22:28:55,676 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 22:28:55,676 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-09 22:28:55,676 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 22:28:55,677 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 22:28:55,677 INFO L85 PathProgramCache]: Analyzing trace with hash 1353465059, now seen corresponding path program 1 times [2024-11-09 22:28:55,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 22:28:55,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264738794] [2024-11-09 22:28:55,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 22:28:55,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 22:28:55,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 22:28:55,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [259669989] [2024-11-09 22:28:55,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 22:28:55,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 22:28:55,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 22:28:55,718 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) [2024-11-09 22:28:55,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 22:28:55,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:28:55,780 INFO L255 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-09 22:28:55,786 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 22:28:55,882 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 22:28:55,883 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 22:28:55,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 22:28:55,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264738794] [2024-11-09 22:28:55,884 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 22:28:55,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259669989] [2024-11-09 22:28:55,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259669989] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 22:28:55,884 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 22:28:55,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-09 22:28:55,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186096799] [2024-11-09 22:28:55,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 22:28:55,885 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 22:28:55,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 22:28:55,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 22:28:55,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 22:28:55,888 INFO L87 Difference]: Start difference. First operand 29 states and 38 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-09 22:28:55,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 22:28:55,978 INFO L93 Difference]: Finished difference Result 50 states and 69 transitions. [2024-11-09 22:28:55,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 22:28:55,978 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2024-11-09 22:28:55,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 22:28:55,980 INFO L225 Difference]: With dead ends: 50 [2024-11-09 22:28:55,980 INFO L226 Difference]: Without dead ends: 47 [2024-11-09 22:28:55,980 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-09 22:28:55,981 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 4 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 22:28:55,981 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 115 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 22:28:55,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-11-09 22:28:55,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 37. [2024-11-09 22:28:55,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 20 states have (on average 1.1) internal successors, (22), 22 states have internal predecessors, (22), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2024-11-09 22:28:55,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 47 transitions. [2024-11-09 22:28:55,999 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 47 transitions. Word has length 16 [2024-11-09 22:28:55,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 22:28:55,999 INFO L471 AbstractCegarLoop]: Abstraction has 37 states and 47 transitions. [2024-11-09 22:28:56,000 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-09 22:28:56,000 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 47 transitions. [2024-11-09 22:28:56,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-11-09 22:28:56,000 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 22:28:56,000 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 22:28:56,018 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-09 22:28:56,201 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 22:28:56,202 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 22:28:56,202 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 22:28:56,202 INFO L85 PathProgramCache]: Analyzing trace with hash -1980317321, now seen corresponding path program 1 times [2024-11-09 22:28:56,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 22:28:56,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144990446] [2024-11-09 22:28:56,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 22:28:56,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 22:28:56,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 22:28:56,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [867052519] [2024-11-09 22:28:56,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 22:28:56,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 22:28:56,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 22:28:56,221 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) [2024-11-09 22:28:56,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 22:28:56,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:28:56,287 INFO L255 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-09 22:28:56,289 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 22:28:56,350 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 22:28:56,350 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 22:28:56,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 22:28:56,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144990446] [2024-11-09 22:28:56,351 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 22:28:56,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867052519] [2024-11-09 22:28:56,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867052519] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 22:28:56,351 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 22:28:56,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-09 22:28:56,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562877245] [2024-11-09 22:28:56,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 22:28:56,352 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 22:28:56,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 22:28:56,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 22:28:56,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 22:28:56,353 INFO L87 Difference]: Start difference. First operand 37 states and 47 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-09 22:28:56,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 22:28:56,462 INFO L93 Difference]: Finished difference Result 54 states and 72 transitions. [2024-11-09 22:28:56,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 22:28:56,467 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 21 [2024-11-09 22:28:56,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 22:28:56,469 INFO L225 Difference]: With dead ends: 54 [2024-11-09 22:28:56,469 INFO L226 Difference]: Without dead ends: 51 [2024-11-09 22:28:56,469 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-09 22:28:56,470 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 4 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 22:28:56,470 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 112 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 22:28:56,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-11-09 22:28:56,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 47. [2024-11-09 22:28:56,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 24 states have (on average 1.125) internal successors, (27), 26 states have internal predecessors, (27), 18 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2024-11-09 22:28:56,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 62 transitions. [2024-11-09 22:28:56,491 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 62 transitions. Word has length 21 [2024-11-09 22:28:56,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 22:28:56,492 INFO L471 AbstractCegarLoop]: Abstraction has 47 states and 62 transitions. [2024-11-09 22:28:56,492 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-09 22:28:56,492 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 62 transitions. [2024-11-09 22:28:56,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-09 22:28:56,493 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 22:28:56,493 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 22:28:56,510 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-09 22:28:56,697 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,SelfDestructingSolverStorable3 [2024-11-09 22:28:56,698 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 22:28:56,698 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 22:28:56,698 INFO L85 PathProgramCache]: Analyzing trace with hash -945415901, now seen corresponding path program 1 times [2024-11-09 22:28:56,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 22:28:56,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295460946] [2024-11-09 22:28:56,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 22:28:56,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 22:28:56,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 22:28:56,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [358324930] [2024-11-09 22:28:56,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 22:28:56,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 22:28:56,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 22:28:56,723 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) [2024-11-09 22:28:56,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 22:28:56,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:28:56,775 INFO L255 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-09 22:28:56,777 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 22:28:56,895 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 22:28:56,897 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 22:28:56,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 22:28:56,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295460946] [2024-11-09 22:28:56,897 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 22:28:56,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358324930] [2024-11-09 22:28:56,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358324930] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 22:28:56,898 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 22:28:56,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-09 22:28:56,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045574714] [2024-11-09 22:28:56,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 22:28:56,899 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 22:28:56,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 22:28:56,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 22:28:56,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 22:28:56,901 INFO L87 Difference]: Start difference. First operand 47 states and 62 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-09 22:28:57,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 22:28:57,043 INFO L93 Difference]: Finished difference Result 62 states and 78 transitions. [2024-11-09 22:28:57,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 22:28:57,044 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 26 [2024-11-09 22:28:57,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 22:28:57,045 INFO L225 Difference]: With dead ends: 62 [2024-11-09 22:28:57,045 INFO L226 Difference]: Without dead ends: 49 [2024-11-09 22:28:57,046 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-09 22:28:57,047 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 4 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 22:28:57,047 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 104 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 22:28:57,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2024-11-09 22:28:57,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2024-11-09 22:28:57,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 28 states have internal predecessors, (29), 16 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2024-11-09 22:28:57,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 60 transitions. [2024-11-09 22:28:57,060 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 60 transitions. Word has length 26 [2024-11-09 22:28:57,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 22:28:57,060 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 60 transitions. [2024-11-09 22:28:57,061 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-09 22:28:57,061 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 60 transitions. [2024-11-09 22:28:57,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-09 22:28:57,062 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 22:28:57,062 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 22:28:57,079 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-09 22:28:57,263 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 22:28:57,263 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 22:28:57,264 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 22:28:57,264 INFO L85 PathProgramCache]: Analyzing trace with hash -2137612214, now seen corresponding path program 1 times [2024-11-09 22:28:57,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 22:28:57,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957253220] [2024-11-09 22:28:57,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 22:28:57,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 22:28:57,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 22:28:57,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2058688998] [2024-11-09 22:28:57,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 22:28:57,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 22:28:57,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 22:28:57,313 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) [2024-11-09 22:28:57,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 22:28:57,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:28:57,367 INFO L255 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-09 22:28:57,370 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 22:28:57,510 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 11 proven. 20 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-09 22:28:57,510 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 22:28:57,693 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 14 proven. 17 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-09 22:28:57,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 22:28:57,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957253220] [2024-11-09 22:28:57,694 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 22:28:57,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058688998] [2024-11-09 22:28:57,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058688998] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 22:28:57,694 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-09 22:28:57,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2024-11-09 22:28:57,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586201906] [2024-11-09 22:28:57,695 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-09 22:28:57,695 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-09 22:28:57,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 22:28:57,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-09 22:28:57,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2024-11-09 22:28:57,696 INFO L87 Difference]: Start difference. First operand 49 states and 60 transitions. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 11 states have internal predecessors, (29), 5 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) [2024-11-09 22:28:57,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 22:28:57,949 INFO L93 Difference]: Finished difference Result 74 states and 94 transitions. [2024-11-09 22:28:57,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-09 22:28:57,950 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 11 states have internal predecessors, (29), 5 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) Word has length 44 [2024-11-09 22:28:57,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 22:28:57,951 INFO L225 Difference]: With dead ends: 74 [2024-11-09 22:28:57,951 INFO L226 Difference]: Without dead ends: 71 [2024-11-09 22:28:57,952 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2024-11-09 22:28:57,953 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 11 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 22:28:57,953 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 180 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 22:28:57,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2024-11-09 22:28:57,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 57. [2024-11-09 22:28:57,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 34 states have internal predecessors, (35), 16 states have call successors, (16), 7 states have call predecessors, (16), 7 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2024-11-09 22:28:57,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 66 transitions. [2024-11-09 22:28:57,977 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 66 transitions. Word has length 44 [2024-11-09 22:28:57,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 22:28:57,977 INFO L471 AbstractCegarLoop]: Abstraction has 57 states and 66 transitions. [2024-11-09 22:28:57,977 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 11 states have internal predecessors, (29), 5 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) [2024-11-09 22:28:57,978 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 66 transitions. [2024-11-09 22:28:57,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-09 22:28:57,979 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 22:28:57,979 INFO L215 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 22:28:57,997 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-09 22:28:58,179 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 22:28:58,179 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 22:28:58,180 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 22:28:58,180 INFO L85 PathProgramCache]: Analyzing trace with hash 1540712048, now seen corresponding path program 2 times [2024-11-09 22:28:58,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 22:28:58,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040138161] [2024-11-09 22:28:58,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 22:28:58,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 22:28:58,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 22:28:58,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1679586916] [2024-11-09 22:28:58,202 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 22:28:58,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 22:28:58,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 22:28:58,204 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) [2024-11-09 22:28:58,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-09 22:28:58,255 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 22:28:58,256 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 22:28:58,256 INFO L255 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-09 22:28:58,259 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 22:28:58,444 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 28 proven. 9 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-11-09 22:28:58,445 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 22:28:58,639 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 28 proven. 9 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-11-09 22:28:58,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 22:28:58,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040138161] [2024-11-09 22:28:58,643 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 22:28:58,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679586916] [2024-11-09 22:28:58,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1679586916] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 22:28:58,643 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-09 22:28:58,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2024-11-09 22:28:58,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568233962] [2024-11-09 22:28:58,644 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-09 22:28:58,644 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-09 22:28:58,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 22:28:58,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-09 22:28:58,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2024-11-09 22:28:58,645 INFO L87 Difference]: Start difference. First operand 57 states and 66 transitions. Second operand has 14 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 6 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 6 states have call successors, (14) [2024-11-09 22:28:58,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 22:28:58,951 INFO L93 Difference]: Finished difference Result 89 states and 107 transitions. [2024-11-09 22:28:58,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-09 22:28:58,952 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 6 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 6 states have call successors, (14) Word has length 49 [2024-11-09 22:28:58,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 22:28:58,955 INFO L225 Difference]: With dead ends: 89 [2024-11-09 22:28:58,955 INFO L226 Difference]: Without dead ends: 83 [2024-11-09 22:28:58,956 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2024-11-09 22:28:58,958 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 12 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 22:28:58,959 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 153 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 22:28:58,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2024-11-09 22:28:58,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 80. [2024-11-09 22:28:58,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 45 states have (on average 1.0666666666666667) internal successors, (48), 47 states have internal predecessors, (48), 24 states have call successors, (24), 10 states have call predecessors, (24), 10 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2024-11-09 22:28:58,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 94 transitions. [2024-11-09 22:28:58,987 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 94 transitions. Word has length 49 [2024-11-09 22:28:58,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 22:28:58,988 INFO L471 AbstractCegarLoop]: Abstraction has 80 states and 94 transitions. [2024-11-09 22:28:58,988 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 6 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 6 states have call successors, (14) [2024-11-09 22:28:58,988 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 94 transitions. [2024-11-09 22:28:58,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-11-09 22:28:58,989 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 22:28:58,990 INFO L215 NwaCegarLoop]: trace histogram [12, 11, 11, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 22:28:59,009 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-09 22:28:59,196 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 22:28:59,197 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 22:28:59,197 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 22:28:59,197 INFO L85 PathProgramCache]: Analyzing trace with hash -1950321542, now seen corresponding path program 1 times [2024-11-09 22:28:59,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 22:28:59,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253420212] [2024-11-09 22:28:59,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 22:28:59,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 22:28:59,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 22:28:59,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1631987994] [2024-11-09 22:28:59,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 22:28:59,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 22:28:59,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 22:28:59,245 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) [2024-11-09 22:28:59,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-09 22:28:59,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:28:59,306 INFO L255 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-09 22:28:59,310 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 22:28:59,504 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 22 proven. 8 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-11-09 22:28:59,505 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 22:29:00,027 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 22 proven. 8 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-11-09 22:29:00,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 22:29:00,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253420212] [2024-11-09 22:29:00,028 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 22:29:00,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631987994] [2024-11-09 22:29:00,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631987994] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 22:29:00,029 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-09 22:29:00,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2024-11-09 22:29:00,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890375029] [2024-11-09 22:29:00,029 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-09 22:29:00,030 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-09 22:29:00,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 22:29:00,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-09 22:29:00,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-11-09 22:29:00,031 INFO L87 Difference]: Start difference. First operand 80 states and 94 transitions. Second operand has 10 states, 8 states have (on average 3.0) internal successors, (24), 9 states have internal predecessors, (24), 6 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) [2024-11-09 22:29:00,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 22:29:00,440 INFO L93 Difference]: Finished difference Result 109 states and 131 transitions. [2024-11-09 22:29:00,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-09 22:29:00,440 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 3.0) internal successors, (24), 9 states have internal predecessors, (24), 6 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) Word has length 70 [2024-11-09 22:29:00,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 22:29:00,442 INFO L225 Difference]: With dead ends: 109 [2024-11-09 22:29:00,442 INFO L226 Difference]: Without dead ends: 106 [2024-11-09 22:29:00,442 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 128 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2024-11-09 22:29:00,443 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 5 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 22:29:00,443 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 156 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 22:29:00,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2024-11-09 22:29:00,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 102. [2024-11-09 22:29:00,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 57 states have (on average 1.0701754385964912) internal successors, (61), 60 states have internal predecessors, (61), 31 states have call successors, (31), 13 states have call predecessors, (31), 13 states have return successors, (29), 28 states have call predecessors, (29), 29 states have call successors, (29) [2024-11-09 22:29:00,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 121 transitions. [2024-11-09 22:29:00,485 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 121 transitions. Word has length 70 [2024-11-09 22:29:00,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 22:29:00,485 INFO L471 AbstractCegarLoop]: Abstraction has 102 states and 121 transitions. [2024-11-09 22:29:00,486 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 3.0) internal successors, (24), 9 states have internal predecessors, (24), 6 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) [2024-11-09 22:29:00,486 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 121 transitions. [2024-11-09 22:29:00,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2024-11-09 22:29:00,487 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 22:29:00,487 INFO L215 NwaCegarLoop]: trace histogram [13, 12, 12, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 22:29:00,504 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-09 22:29:00,692 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 22:29:00,693 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 22:29:00,693 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 22:29:00,693 INFO L85 PathProgramCache]: Analyzing trace with hash -436515072, now seen corresponding path program 1 times [2024-11-09 22:29:00,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 22:29:00,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251374580] [2024-11-09 22:29:00,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 22:29:00,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 22:29:00,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 22:29:00,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1396783724] [2024-11-09 22:29:00,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 22:29:00,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 22:29:00,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 22:29:00,721 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 22:29:00,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-09 22:29:00,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:29:00,785 INFO L255 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-09 22:29:00,788 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 22:29:01,115 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 24 proven. 8 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-11-09 22:29:01,115 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 22:29:01,396 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 24 proven. 8 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-11-09 22:29:01,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 22:29:01,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251374580] [2024-11-09 22:29:01,397 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 22:29:01,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396783724] [2024-11-09 22:29:01,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396783724] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 22:29:01,397 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-09 22:29:01,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2024-11-09 22:29:01,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701253238] [2024-11-09 22:29:01,397 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-09 22:29:01,398 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-09 22:29:01,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 22:29:01,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-09 22:29:01,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2024-11-09 22:29:01,398 INFO L87 Difference]: Start difference. First operand 102 states and 121 transitions. Second operand has 14 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 6 states have call successors, (26), 3 states have call predecessors, (26), 1 states have return successors, (24), 6 states have call predecessors, (24), 6 states have call successors, (24) [2024-11-09 22:29:01,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 22:29:01,948 INFO L93 Difference]: Finished difference Result 121 states and 140 transitions. [2024-11-09 22:29:01,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-09 22:29:01,949 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 6 states have call successors, (26), 3 states have call predecessors, (26), 1 states have return successors, (24), 6 states have call predecessors, (24), 6 states have call successors, (24) Word has length 75 [2024-11-09 22:29:01,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 22:29:01,952 INFO L225 Difference]: With dead ends: 121 [2024-11-09 22:29:01,953 INFO L226 Difference]: Without dead ends: 111 [2024-11-09 22:29:01,954 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2024-11-09 22:29:01,954 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 17 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 22:29:01,955 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 246 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 22:29:01,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2024-11-09 22:29:01,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 108. [2024-11-09 22:29:01,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 63 states have (on average 1.0476190476190477) internal successors, (66), 65 states have internal predecessors, (66), 29 states have call successors, (29), 15 states have call predecessors, (29), 15 states have return successors, (28), 27 states have call predecessors, (28), 28 states have call successors, (28) [2024-11-09 22:29:01,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 123 transitions. [2024-11-09 22:29:01,988 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 123 transitions. Word has length 75 [2024-11-09 22:29:01,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 22:29:01,989 INFO L471 AbstractCegarLoop]: Abstraction has 108 states and 123 transitions. [2024-11-09 22:29:01,989 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 6 states have call successors, (26), 3 states have call predecessors, (26), 1 states have return successors, (24), 6 states have call predecessors, (24), 6 states have call successors, (24) [2024-11-09 22:29:01,989 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 123 transitions. [2024-11-09 22:29:01,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2024-11-09 22:29:01,990 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 22:29:01,990 INFO L215 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 22:29:02,007 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-09 22:29:02,190 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 22:29:02,191 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 22:29:02,191 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 22:29:02,191 INFO L85 PathProgramCache]: Analyzing trace with hash 597706225, now seen corresponding path program 3 times [2024-11-09 22:29:02,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 22:29:02,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835861177] [2024-11-09 22:29:02,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 22:29:02,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 22:29:02,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 22:29:02,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [770991059] [2024-11-09 22:29:02,239 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 22:29:02,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 22:29:02,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 22:29:02,246 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 22:29:02,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-09 22:29:02,335 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-09 22:29:02,335 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 22:29:02,337 INFO L255 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-11-09 22:29:02,339 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 22:29:02,585 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 55 proven. 27 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2024-11-09 22:29:02,585 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 22:29:03,363 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 55 proven. 27 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2024-11-09 22:29:03,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 22:29:03,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835861177] [2024-11-09 22:29:03,364 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 22:29:03,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770991059] [2024-11-09 22:29:03,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770991059] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 22:29:03,365 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-09 22:29:03,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2024-11-09 22:29:03,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157036386] [2024-11-09 22:29:03,365 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-09 22:29:03,366 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-09 22:29:03,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 22:29:03,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-09 22:29:03,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2024-11-09 22:29:03,369 INFO L87 Difference]: Start difference. First operand 108 states and 123 transitions. Second operand has 16 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 8 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 6 states have call predecessors, (26), 8 states have call successors, (26) [2024-11-09 22:29:04,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 22:29:04,218 INFO L93 Difference]: Finished difference Result 133 states and 147 transitions. [2024-11-09 22:29:04,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-09 22:29:04,219 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 8 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 6 states have call predecessors, (26), 8 states have call successors, (26) Word has length 82 [2024-11-09 22:29:04,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 22:29:04,221 INFO L225 Difference]: With dead ends: 133 [2024-11-09 22:29:04,221 INFO L226 Difference]: Without dead ends: 114 [2024-11-09 22:29:04,222 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2024-11-09 22:29:04,222 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 11 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-09 22:29:04,223 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 190 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-09 22:29:04,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2024-11-09 22:29:04,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 111. [2024-11-09 22:29:04,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 69 states have (on average 1.0289855072463767) internal successors, (71), 70 states have internal predecessors, (71), 24 states have call successors, (24), 17 states have call predecessors, (24), 17 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2024-11-09 22:29:04,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 118 transitions. [2024-11-09 22:29:04,259 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 118 transitions. Word has length 82 [2024-11-09 22:29:04,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 22:29:04,259 INFO L471 AbstractCegarLoop]: Abstraction has 111 states and 118 transitions. [2024-11-09 22:29:04,260 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 8 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 6 states have call predecessors, (26), 8 states have call successors, (26) [2024-11-09 22:29:04,260 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 118 transitions. [2024-11-09 22:29:04,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2024-11-09 22:29:04,262 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 22:29:04,262 INFO L215 NwaCegarLoop]: trace histogram [22, 21, 21, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 22:29:04,270 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-09 22:29:04,462 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-09 22:29:04,463 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 22:29:04,463 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 22:29:04,463 INFO L85 PathProgramCache]: Analyzing trace with hash 1736778824, now seen corresponding path program 2 times [2024-11-09 22:29:04,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 22:29:04,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508781312] [2024-11-09 22:29:04,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 22:29:04,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 22:29:04,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 22:29:04,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [40186838] [2024-11-09 22:29:04,532 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 22:29:04,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 22:29:04,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 22:29:04,535 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 22:29:04,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-09 22:29:04,617 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 22:29:04,618 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 22:29:04,619 INFO L255 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-11-09 22:29:04,622 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 22:29:04,972 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 86 proven. 64 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2024-11-09 22:29:04,973 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 22:29:05,716 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 110 proven. 16 refuted. 0 times theorem prover too weak. 804 trivial. 0 not checked. [2024-11-09 22:29:05,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 22:29:05,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508781312] [2024-11-09 22:29:05,717 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 22:29:05,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40186838] [2024-11-09 22:29:05,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40186838] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 22:29:05,717 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-09 22:29:05,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 17 [2024-11-09 22:29:05,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60021646] [2024-11-09 22:29:05,717 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-09 22:29:05,729 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-09 22:29:05,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 22:29:05,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-09 22:29:05,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2024-11-09 22:29:05,730 INFO L87 Difference]: Start difference. First operand 111 states and 118 transitions. Second operand has 17 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 10 states have call successors, (34), 3 states have call predecessors, (34), 2 states have return successors, (32), 8 states have call predecessors, (32), 9 states have call successors, (32) [2024-11-09 22:29:06,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 22:29:06,344 INFO L93 Difference]: Finished difference Result 137 states and 152 transitions. [2024-11-09 22:29:06,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-09 22:29:06,344 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 10 states have call successors, (34), 3 states have call predecessors, (34), 2 states have return successors, (32), 8 states have call predecessors, (32), 9 states have call successors, (32) Word has length 126 [2024-11-09 22:29:06,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 22:29:06,345 INFO L225 Difference]: With dead ends: 137 [2024-11-09 22:29:06,345 INFO L226 Difference]: Without dead ends: 134 [2024-11-09 22:29:06,346 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 235 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2024-11-09 22:29:06,347 INFO L432 NwaCegarLoop]: 39 mSDtfsCounter, 11 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 427 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-09 22:29:06,347 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 321 Invalid, 450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 427 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-09 22:29:06,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2024-11-09 22:29:06,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 115. [2024-11-09 22:29:06,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 72 states have (on average 1.0277777777777777) internal successors, (74), 73 states have internal predecessors, (74), 24 states have call successors, (24), 18 states have call predecessors, (24), 18 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2024-11-09 22:29:06,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 121 transitions. [2024-11-09 22:29:06,374 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 121 transitions. Word has length 126 [2024-11-09 22:29:06,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 22:29:06,374 INFO L471 AbstractCegarLoop]: Abstraction has 115 states and 121 transitions. [2024-11-09 22:29:06,374 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 10 states have call successors, (34), 3 states have call predecessors, (34), 2 states have return successors, (32), 8 states have call predecessors, (32), 9 states have call successors, (32) [2024-11-09 22:29:06,375 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 121 transitions. [2024-11-09 22:29:06,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2024-11-09 22:29:06,376 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 22:29:06,376 INFO L215 NwaCegarLoop]: trace histogram [23, 22, 22, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 22:29:06,393 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-09 22:29:06,577 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 22:29:06,577 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 22:29:06,577 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 22:29:06,577 INFO L85 PathProgramCache]: Analyzing trace with hash -1001238542, now seen corresponding path program 2 times [2024-11-09 22:29:06,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 22:29:06,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411023360] [2024-11-09 22:29:06,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 22:29:06,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 22:29:06,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 22:29:06,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1433547980] [2024-11-09 22:29:06,615 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 22:29:06,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 22:29:06,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 22:29:06,618 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 22:29:06,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-09 22:29:06,693 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 22:29:06,693 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 22:29:06,701 INFO L255 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-11-09 22:29:06,704 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 22:29:06,968 INFO L134 CoverageAnalysis]: Checked inductivity of 1016 backedges. 88 proven. 67 refuted. 0 times theorem prover too weak. 861 trivial. 0 not checked. [2024-11-09 22:29:06,969 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 22:29:07,710 INFO L134 CoverageAnalysis]: Checked inductivity of 1016 backedges. 88 proven. 43 refuted. 0 times theorem prover too weak. 885 trivial. 0 not checked. [2024-11-09 22:29:07,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 22:29:07,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411023360] [2024-11-09 22:29:07,711 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 22:29:07,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433547980] [2024-11-09 22:29:07,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433547980] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 22:29:07,711 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-09 22:29:07,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 18 [2024-11-09 22:29:07,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792113806] [2024-11-09 22:29:07,712 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-09 22:29:07,712 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-09 22:29:07,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 22:29:07,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-09 22:29:07,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2024-11-09 22:29:07,714 INFO L87 Difference]: Start difference. First operand 115 states and 121 transitions. Second operand has 18 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 10 states have call successors, (36), 3 states have call predecessors, (36), 2 states have return successors, (34), 8 states have call predecessors, (34), 10 states have call successors, (34) [2024-11-09 22:29:08,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 22:29:08,174 INFO L93 Difference]: Finished difference Result 149 states and 161 transitions. [2024-11-09 22:29:08,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-09 22:29:08,175 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 10 states have call successors, (36), 3 states have call predecessors, (36), 2 states have return successors, (34), 8 states have call predecessors, (34), 10 states have call successors, (34) Word has length 131 [2024-11-09 22:29:08,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 22:29:08,177 INFO L225 Difference]: With dead ends: 149 [2024-11-09 22:29:08,177 INFO L226 Difference]: Without dead ends: 144 [2024-11-09 22:29:08,178 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 242 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2024-11-09 22:29:08,178 INFO L432 NwaCegarLoop]: 39 mSDtfsCounter, 11 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 22:29:08,179 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 317 Invalid, 434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 392 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 22:29:08,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2024-11-09 22:29:08,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 117. [2024-11-09 22:29:08,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 74 states have (on average 1.0135135135135136) internal successors, (75), 74 states have internal predecessors, (75), 24 states have call successors, (24), 19 states have call predecessors, (24), 18 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2024-11-09 22:29:08,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 122 transitions. [2024-11-09 22:29:08,221 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 122 transitions. Word has length 131 [2024-11-09 22:29:08,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 22:29:08,222 INFO L471 AbstractCegarLoop]: Abstraction has 117 states and 122 transitions. [2024-11-09 22:29:08,222 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 10 states have call successors, (36), 3 states have call predecessors, (36), 2 states have return successors, (34), 8 states have call predecessors, (34), 10 states have call successors, (34) [2024-11-09 22:29:08,222 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 122 transitions. [2024-11-09 22:29:08,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2024-11-09 22:29:08,228 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 22:29:08,228 INFO L215 NwaCegarLoop]: trace histogram [24, 23, 23, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 22:29:08,245 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-09 22:29:08,432 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-09 22:29:08,433 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 22:29:08,433 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 22:29:08,433 INFO L85 PathProgramCache]: Analyzing trace with hash -560333240, now seen corresponding path program 1 times [2024-11-09 22:29:08,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 22:29:08,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887031191] [2024-11-09 22:29:08,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 22:29:08,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 22:29:08,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 22:29:08,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [950835057] [2024-11-09 22:29:08,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 22:29:08,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 22:29:08,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 22:29:08,481 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 22:29:08,482 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-09 22:29:08,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:29:08,559 INFO L255 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-11-09 22:29:08,562 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 22:29:08,800 INFO L134 CoverageAnalysis]: Checked inductivity of 1106 backedges. 45 proven. 115 refuted. 0 times theorem prover too weak. 946 trivial. 0 not checked. [2024-11-09 22:29:08,801 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 22:29:18,446 INFO L134 CoverageAnalysis]: Checked inductivity of 1106 backedges. 45 proven. 107 refuted. 8 times theorem prover too weak. 946 trivial. 0 not checked. [2024-11-09 22:29:18,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 22:29:18,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887031191] [2024-11-09 22:29:18,447 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 22:29:18,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950835057] [2024-11-09 22:29:18,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950835057] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 22:29:18,448 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-09 22:29:18,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2024-11-09 22:29:18,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561294586] [2024-11-09 22:29:18,448 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-09 22:29:18,449 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-09 22:29:18,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 22:29:18,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-09 22:29:18,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=213, Unknown=2, NotChecked=0, Total=272 [2024-11-09 22:29:18,451 INFO L87 Difference]: Start difference. First operand 117 states and 122 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 15 states have internal predecessors, (43), 9 states have call successors, (48), 3 states have call predecessors, (48), 2 states have return successors, (46), 8 states have call predecessors, (46), 9 states have call successors, (46) [2024-11-09 22:29:23,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 22:29:23,628 INFO L93 Difference]: Finished difference Result 133 states and 146 transitions. [2024-11-09 22:29:23,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-09 22:29:23,629 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 15 states have internal predecessors, (43), 9 states have call successors, (48), 3 states have call predecessors, (48), 2 states have return successors, (46), 8 states have call predecessors, (46), 9 states have call successors, (46) Word has length 136 [2024-11-09 22:29:23,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 22:29:23,630 INFO L225 Difference]: With dead ends: 133 [2024-11-09 22:29:23,630 INFO L226 Difference]: Without dead ends: 0 [2024-11-09 22:29:23,632 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 255 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 13.6s TimeCoverageRelationStatistics Valid=76, Invalid=263, Unknown=3, NotChecked=0, Total=342 [2024-11-09 22:29:23,633 INFO L432 NwaCegarLoop]: 38 mSDtfsCounter, 8 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-09 22:29:23,633 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 315 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 314 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-09 22:29:23,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-11-09 22:29:23,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-11-09 22:29:23,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 22:29:23,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-11-09 22:29:23,634 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 136 [2024-11-09 22:29:23,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 22:29:23,634 INFO L471 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-11-09 22:29:23,634 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 15 states have internal predecessors, (43), 9 states have call successors, (48), 3 states have call predecessors, (48), 2 states have return successors, (46), 8 states have call predecessors, (46), 9 states have call successors, (46) [2024-11-09 22:29:23,634 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-11-09 22:29:23,634 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-11-09 22:29:23,638 INFO L782 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-11-09 22:29:23,655 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-09 22:29:23,842 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-09 22:29:23,845 INFO L407 BasicCegarLoop]: Path program histogram: [3, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-09 22:29:23,847 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.