./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_unwindbound20.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8be7027f 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/prodbin-ll_unwindbound20.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 be4e75b70a907f4bb3fe11ead30460ebebe535afde280ea19731f48bb2dd2cd7 --- Real Ultimate output --- This is Ultimate 0.2.5-wip.dk.perfect-tracechecks-8be7027-m [2024-11-11 20:21:04,860 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-11 20:21:04,951 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-11 20:21:04,956 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-11 20:21:04,957 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-11 20:21:04,986 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-11 20:21:04,987 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-11 20:21:04,987 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-11 20:21:04,988 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-11 20:21:04,989 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-11 20:21:04,990 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-11 20:21:04,990 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-11 20:21:04,991 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-11 20:21:04,991 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-11 20:21:04,991 INFO L153 SettingsManager]: * Use SBE=true [2024-11-11 20:21:04,991 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-11 20:21:04,993 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-11 20:21:04,994 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-11 20:21:04,994 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-11 20:21:04,994 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-11 20:21:04,995 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-11 20:21:04,996 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-11 20:21:04,996 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-11 20:21:04,996 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-11 20:21:04,996 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-11 20:21:04,997 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-11 20:21:04,997 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-11 20:21:04,997 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-11 20:21:04,997 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-11 20:21:04,998 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-11 20:21:04,998 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-11 20:21:04,998 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-11 20:21:04,998 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-11 20:21:04,998 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-11 20:21:04,999 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-11 20:21:04,999 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-11 20:21:05,000 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-11 20:21:05,000 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-11 20:21:05,001 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-11 20:21:05,001 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-11 20:21:05,001 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-11 20:21:05,001 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-11 20:21:05,002 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> be4e75b70a907f4bb3fe11ead30460ebebe535afde280ea19731f48bb2dd2cd7 [2024-11-11 20:21:05,271 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-11 20:21:05,296 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-11 20:21:05,300 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-11 20:21:05,302 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-11 20:21:05,302 INFO L274 PluginConnector]: CDTParser initialized [2024-11-11 20:21:05,303 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_unwindbound20.c [2024-11-11 20:21:06,714 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-11 20:21:06,941 INFO L384 CDTParser]: Found 1 translation units. [2024-11-11 20:21:06,942 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_unwindbound20.c [2024-11-11 20:21:06,951 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/54b9613c7/00ab7f2b1e4f4b61a3ce84806ab5d5bd/FLAGec51cf12b [2024-11-11 20:21:07,296 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/54b9613c7/00ab7f2b1e4f4b61a3ce84806ab5d5bd [2024-11-11 20:21:07,299 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-11 20:21:07,300 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-11 20:21:07,301 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-11 20:21:07,301 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-11 20:21:07,308 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-11 20:21:07,309 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.11 08:21:07" (1/1) ... [2024-11-11 20:21:07,310 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75560272 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 08:21:07, skipping insertion in model container [2024-11-11 20:21:07,310 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.11 08:21:07" (1/1) ... [2024-11-11 20:21:07,327 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-11 20:21:07,511 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/prodbin-ll_unwindbound20.c[1176,1189] [2024-11-11 20:21:07,531 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-11 20:21:07,540 INFO L200 MainTranslator]: Completed pre-run [2024-11-11 20:21:07,550 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/prodbin-ll_unwindbound20.c[1176,1189] [2024-11-11 20:21:07,555 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-11 20:21:07,571 INFO L204 MainTranslator]: Completed translation [2024-11-11 20:21:07,571 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 08:21:07 WrapperNode [2024-11-11 20:21:07,571 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-11 20:21:07,572 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-11 20:21:07,573 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-11 20:21:07,573 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-11 20:21:07,578 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 08:21:07" (1/1) ... [2024-11-11 20:21:07,586 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 08:21:07" (1/1) ... [2024-11-11 20:21:07,601 INFO L138 Inliner]: procedures = 14, calls = 10, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 49 [2024-11-11 20:21:07,602 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-11 20:21:07,603 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-11 20:21:07,603 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-11 20:21:07,603 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-11 20:21:07,614 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 08:21:07" (1/1) ... [2024-11-11 20:21:07,615 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 08:21:07" (1/1) ... [2024-11-11 20:21:07,616 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 08:21:07" (1/1) ... [2024-11-11 20:21:07,626 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]. [2024-11-11 20:21:07,626 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 08:21:07" (1/1) ... [2024-11-11 20:21:07,627 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 08:21:07" (1/1) ... [2024-11-11 20:21:07,629 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 08:21:07" (1/1) ... [2024-11-11 20:21:07,637 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 08:21:07" (1/1) ... [2024-11-11 20:21:07,638 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 08:21:07" (1/1) ... [2024-11-11 20:21:07,639 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 08:21:07" (1/1) ... [2024-11-11 20:21:07,644 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-11 20:21:07,645 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-11 20:21:07,645 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-11 20:21:07,645 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-11 20:21:07,646 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 08:21:07" (1/1) ... [2024-11-11 20:21:07,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-11 20:21:07,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 20:21:07,676 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) [2024-11-11 20:21:07,678 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 [2024-11-11 20:21:07,725 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-11 20:21:07,726 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-11 20:21:07,726 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-11 20:21:07,726 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-11 20:21:07,726 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-11 20:21:07,726 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-11 20:21:07,783 INFO L238 CfgBuilder]: Building ICFG [2024-11-11 20:21:07,787 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-11 20:21:07,923 INFO L? ?]: Removed 7 outVars from TransFormulas that were not future-live. [2024-11-11 20:21:07,923 INFO L287 CfgBuilder]: Performing block encoding [2024-11-11 20:21:07,934 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-11 20:21:07,934 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-11-11 20:21:07,935 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.11 08:21:07 BoogieIcfgContainer [2024-11-11 20:21:07,935 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-11 20:21:07,939 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-11 20:21:07,939 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-11 20:21:07,944 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-11 20:21:07,945 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.11 08:21:07" (1/3) ... [2024-11-11 20:21:07,946 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@693f088b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.11 08:21:07, skipping insertion in model container [2024-11-11 20:21:07,947 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 08:21:07" (2/3) ... [2024-11-11 20:21:07,947 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@693f088b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.11 08:21:07, skipping insertion in model container [2024-11-11 20:21:07,947 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.11 08:21:07" (3/3) ... [2024-11-11 20:21:07,949 INFO L112 eAbstractionObserver]: Analyzing ICFG prodbin-ll_unwindbound20.c [2024-11-11 20:21:07,962 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-11 20:21:07,962 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-11 20:21:08,009 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-11 20:21:08,017 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;@2806ded6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-11 20:21:08,018 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-11 20:21:08,022 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 16 states have (on average 1.4375) internal successors, (23), 17 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-11 20:21:08,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-11 20:21:08,029 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 20:21:08,030 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 20:21:08,030 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 20:21:08,034 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 20:21:08,034 INFO L85 PathProgramCache]: Analyzing trace with hash -572597424, now seen corresponding path program 1 times [2024-11-11 20:21:08,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 20:21:08,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832149494] [2024-11-11 20:21:08,043 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 20:21:08,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 20:21:08,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:21:08,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-11 20:21:08,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 20:21:08,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832149494] [2024-11-11 20:21:08,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832149494] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-11 20:21:08,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-11 20:21:08,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-11 20:21:08,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938406917] [2024-11-11 20:21:08,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-11 20:21:08,167 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-11 20:21:08,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 20:21:08,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-11 20:21:08,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-11 20:21:08,189 INFO L87 Difference]: Start difference. First operand has 21 states, 16 states have (on average 1.4375) internal successors, (23), 17 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-11 20:21:08,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 20:21:08,202 INFO L93 Difference]: Finished difference Result 39 states and 52 transitions. [2024-11-11 20:21:08,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-11 20:21:08,204 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2024-11-11 20:21:08,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 20:21:08,209 INFO L225 Difference]: With dead ends: 39 [2024-11-11 20:21:08,209 INFO L226 Difference]: Without dead ends: 17 [2024-11-11 20:21:08,212 INFO L434 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 [2024-11-11 20:21:08,214 INFO L435 NwaCegarLoop]: 24 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, 24 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 [2024-11-11 20:21:08,215 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-11 20:21:08,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2024-11-11 20:21:08,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2024-11-11 20:21:08,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-11 20:21:08,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2024-11-11 20:21:08,242 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 9 [2024-11-11 20:21:08,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 20:21:08,243 INFO L471 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2024-11-11 20:21:08,243 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-11 20:21:08,243 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2024-11-11 20:21:08,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-11 20:21:08,244 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 20:21:08,244 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 20:21:08,244 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-11 20:21:08,244 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 20:21:08,245 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 20:21:08,245 INFO L85 PathProgramCache]: Analyzing trace with hash -1986366499, now seen corresponding path program 1 times [2024-11-11 20:21:08,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 20:21:08,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402291694] [2024-11-11 20:21:08,246 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 20:21:08,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 20:21:08,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:21:08,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-11 20:21:08,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 20:21:08,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402291694] [2024-11-11 20:21:08,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402291694] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-11 20:21:08,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-11 20:21:08,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-11 20:21:08,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75111956] [2024-11-11 20:21:08,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-11 20:21:08,389 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-11 20:21:08,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 20:21:08,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-11 20:21:08,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-11 20:21:08,391 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 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) [2024-11-11 20:21:08,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 20:21:08,411 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2024-11-11 20:21:08,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-11 20:21:08,412 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 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 [2024-11-11 20:21:08,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 20:21:08,412 INFO L225 Difference]: With dead ends: 26 [2024-11-11 20:21:08,413 INFO L226 Difference]: Without dead ends: 19 [2024-11-11 20:21:08,413 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-11 20:21:08,414 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-11 20:21:08,415 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 48 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-11 20:21:08,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2024-11-11 20:21:08,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2024-11-11 20:21:08,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-11 20:21:08,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2024-11-11 20:21:08,420 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 10 [2024-11-11 20:21:08,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 20:21:08,420 INFO L471 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2024-11-11 20:21:08,420 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 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) [2024-11-11 20:21:08,420 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2024-11-11 20:21:08,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-11 20:21:08,421 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 20:21:08,421 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 20:21:08,421 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-11 20:21:08,421 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 20:21:08,422 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 20:21:08,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1984579039, now seen corresponding path program 1 times [2024-11-11 20:21:08,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 20:21:08,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496625330] [2024-11-11 20:21:08,424 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 20:21:08,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 20:21:08,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-11 20:21:08,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1267918066] [2024-11-11 20:21:08,464 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 20:21:08,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 20:21:08,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 20:21:08,481 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) [2024-11-11 20:21:08,482 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-11 20:21:08,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:21:08,558 INFO L256 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-11 20:21:08,564 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 20:21:08,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-11 20:21:08,703 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-11 20:21:08,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 20:21:08,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496625330] [2024-11-11 20:21:08,704 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-11 20:21:08,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267918066] [2024-11-11 20:21:08,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1267918066] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-11 20:21:08,704 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-11 20:21:08,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-11 20:21:08,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372590745] [2024-11-11 20:21:08,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-11 20:21:08,705 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-11 20:21:08,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 20:21:08,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-11 20:21:08,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-11 20:21:08,708 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 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) [2024-11-11 20:21:08,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 20:21:08,766 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2024-11-11 20:21:08,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-11 20:21:08,767 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 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 [2024-11-11 20:21:08,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 20:21:08,770 INFO L225 Difference]: With dead ends: 29 [2024-11-11 20:21:08,771 INFO L226 Difference]: Without dead ends: 27 [2024-11-11 20:21:08,771 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-11 20:21:08,772 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 5 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-11 20:21:08,776 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 48 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-11 20:21:08,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-11-11 20:21:08,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2024-11-11 20:21:08,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 20 states have internal predecessors, (22), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-11 20:21:08,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2024-11-11 20:21:08,786 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 10 [2024-11-11 20:21:08,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 20:21:08,787 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2024-11-11 20:21:08,787 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 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) [2024-11-11 20:21:08,787 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2024-11-11 20:21:08,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-11 20:21:08,788 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 20:21:08,788 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 20:21:08,808 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-11 20:21:08,989 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 [2024-11-11 20:21:08,990 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 20:21:08,990 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 20:21:08,990 INFO L85 PathProgramCache]: Analyzing trace with hash 845350648, now seen corresponding path program 1 times [2024-11-11 20:21:08,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 20:21:08,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331029938] [2024-11-11 20:21:08,991 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 20:21:08,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 20:21:09,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:21:09,139 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-11-11 20:21:09,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:21:09,152 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-11 20:21:09,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 20:21:09,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331029938] [2024-11-11 20:21:09,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331029938] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-11 20:21:09,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-11 20:21:09,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-11 20:21:09,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424990850] [2024-11-11 20:21:09,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-11 20:21:09,156 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-11 20:21:09,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 20:21:09,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-11 20:21:09,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-11 20:21:09,158 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 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) [2024-11-11 20:21:09,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 20:21:09,194 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2024-11-11 20:21:09,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-11 20:21:09,195 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 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 [2024-11-11 20:21:09,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 20:21:09,196 INFO L225 Difference]: With dead ends: 34 [2024-11-11 20:21:09,196 INFO L226 Difference]: Without dead ends: 27 [2024-11-11 20:21:09,197 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-11 20:21:09,198 INFO L435 NwaCegarLoop]: 15 mSDtfsCounter, 16 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-11 20:21:09,198 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 43 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-11 20:21:09,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-11-11 20:21:09,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2024-11-11 20:21:09,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-11 20:21:09,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2024-11-11 20:21:09,204 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 16 [2024-11-11 20:21:09,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 20:21:09,204 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2024-11-11 20:21:09,204 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 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) [2024-11-11 20:21:09,205 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2024-11-11 20:21:09,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-11-11 20:21:09,205 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 20:21:09,205 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 20:21:09,205 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-11 20:21:09,206 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 20:21:09,206 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 20:21:09,206 INFO L85 PathProgramCache]: Analyzing trace with hash 905454657, now seen corresponding path program 1 times [2024-11-11 20:21:09,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 20:21:09,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441963055] [2024-11-11 20:21:09,206 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 20:21:09,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 20:21:09,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:21:09,342 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-11-11 20:21:09,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:21:09,351 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-11 20:21:09,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 20:21:09,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441963055] [2024-11-11 20:21:09,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441963055] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 20:21:09,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453538014] [2024-11-11 20:21:09,356 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 20:21:09,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 20:21:09,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 20:21:09,358 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) [2024-11-11 20:21:09,360 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-11 20:21:09,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:21:09,420 INFO L256 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-11 20:21:09,422 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 20:21:09,463 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-11 20:21:09,465 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 20:21:09,527 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-11 20:21:09,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453538014] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 20:21:09,528 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-11 20:21:09,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 5] total 8 [2024-11-11 20:21:09,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923646520] [2024-11-11 20:21:09,528 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-11 20:21:09,529 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-11 20:21:09,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 20:21:09,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-11 20:21:09,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-11-11 20:21:09,530 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-11 20:21:09,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 20:21:09,611 INFO L93 Difference]: Finished difference Result 62 states and 72 transitions. [2024-11-11 20:21:09,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-11 20:21:09,613 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 20 [2024-11-11 20:21:09,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 20:21:09,614 INFO L225 Difference]: With dead ends: 62 [2024-11-11 20:21:09,614 INFO L226 Difference]: Without dead ends: 55 [2024-11-11 20:21:09,614 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2024-11-11 20:21:09,615 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 25 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-11 20:21:09,616 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 80 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-11 20:21:09,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2024-11-11 20:21:09,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 51. [2024-11-11 20:21:09,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 39 states have (on average 1.2820512820512822) internal successors, (50), 42 states have internal predecessors, (50), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-11 20:21:09,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 61 transitions. [2024-11-11 20:21:09,625 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 61 transitions. Word has length 20 [2024-11-11 20:21:09,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 20:21:09,625 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 61 transitions. [2024-11-11 20:21:09,625 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-11 20:21:09,625 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 61 transitions. [2024-11-11 20:21:09,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-11-11 20:21:09,626 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 20:21:09,626 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 20:21:09,644 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-11 20:21:09,830 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 20:21:09,831 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 20:21:09,831 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 20:21:09,832 INFO L85 PathProgramCache]: Analyzing trace with hash 907242117, now seen corresponding path program 1 times [2024-11-11 20:21:09,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 20:21:09,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489660334] [2024-11-11 20:21:09,833 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 20:21:09,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 20:21:09,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-11 20:21:09,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1048816472] [2024-11-11 20:21:09,867 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 20:21:09,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 20:21:09,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 20:21:09,872 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) [2024-11-11 20:21:09,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-11 20:21:09,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:21:09,926 INFO L256 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-11 20:21:09,928 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 20:21:10,233 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-11 20:21:10,234 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 20:21:11,694 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-11 20:21:11,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 20:21:11,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489660334] [2024-11-11 20:21:11,695 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-11 20:21:11,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048816472] [2024-11-11 20:21:11,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048816472] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-11 20:21:11,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-11 20:21:11,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2024-11-11 20:21:11,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048121005] [2024-11-11 20:21:11,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-11 20:21:11,696 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-11 20:21:11,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 20:21:11,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-11 20:21:11,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2024-11-11 20:21:11,697 INFO L87 Difference]: Start difference. First operand 51 states and 61 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 2 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) [2024-11-11 20:21:12,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 20:21:12,139 INFO L93 Difference]: Finished difference Result 90 states and 109 transitions. [2024-11-11 20:21:12,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-11 20:21:12,139 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 2 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 20 [2024-11-11 20:21:12,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 20:21:12,142 INFO L225 Difference]: With dead ends: 90 [2024-11-11 20:21:12,143 INFO L226 Difference]: Without dead ends: 88 [2024-11-11 20:21:12,144 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2024-11-11 20:21:12,144 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 8 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-11 20:21:12,145 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 59 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-11 20:21:12,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2024-11-11 20:21:12,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 84. [2024-11-11 20:21:12,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 66 states have (on average 1.2727272727272727) internal successors, (84), 69 states have internal predecessors, (84), 10 states have call successors, (10), 7 states have call predecessors, (10), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-11 20:21:12,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 101 transitions. [2024-11-11 20:21:12,163 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 101 transitions. Word has length 20 [2024-11-11 20:21:12,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 20:21:12,164 INFO L471 AbstractCegarLoop]: Abstraction has 84 states and 101 transitions. [2024-11-11 20:21:12,164 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 2 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) [2024-11-11 20:21:12,164 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 101 transitions. [2024-11-11 20:21:12,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-11-11 20:21:12,165 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 20:21:12,165 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 20:21:12,181 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-11 20:21:12,369 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 20:21:12,370 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 20:21:12,370 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 20:21:12,370 INFO L85 PathProgramCache]: Analyzing trace with hash 97895491, now seen corresponding path program 1 times [2024-11-11 20:21:12,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 20:21:12,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767813903] [2024-11-11 20:21:12,371 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 20:21:12,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 20:21:12,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-11 20:21:12,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1489130790] [2024-11-11 20:21:12,398 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 20:21:12,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 20:21:12,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 20:21:12,401 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) [2024-11-11 20:21:12,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-11 20:21:12,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:21:12,449 INFO L256 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-11 20:21:12,451 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 20:21:12,717 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-11 20:21:12,717 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 20:21:13,307 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-11 20:21:13,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 20:21:13,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767813903] [2024-11-11 20:21:13,308 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-11 20:21:13,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489130790] [2024-11-11 20:21:13,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489130790] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 20:21:13,308 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-11 20:21:13,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2024-11-11 20:21:13,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375564976] [2024-11-11 20:21:13,309 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-11 20:21:13,309 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-11 20:21:13,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 20:21:13,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-11 20:21:13,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2024-11-11 20:21:13,310 INFO L87 Difference]: Start difference. First operand 84 states and 101 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-11 20:21:13,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 20:21:13,695 INFO L93 Difference]: Finished difference Result 127 states and 153 transitions. [2024-11-11 20:21:13,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-11 20:21:13,696 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2024-11-11 20:21:13,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 20:21:13,698 INFO L225 Difference]: With dead ends: 127 [2024-11-11 20:21:13,698 INFO L226 Difference]: Without dead ends: 118 [2024-11-11 20:21:13,699 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=104, Invalid=276, Unknown=0, NotChecked=0, Total=380 [2024-11-11 20:21:13,699 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 64 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-11 20:21:13,699 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 96 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-11 20:21:13,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2024-11-11 20:21:13,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 100. [2024-11-11 20:21:13,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 79 states have (on average 1.2278481012658229) internal successors, (97), 82 states have internal predecessors, (97), 12 states have call successors, (12), 9 states have call predecessors, (12), 8 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-11 20:21:13,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 118 transitions. [2024-11-11 20:21:13,727 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 118 transitions. Word has length 20 [2024-11-11 20:21:13,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 20:21:13,730 INFO L471 AbstractCegarLoop]: Abstraction has 100 states and 118 transitions. [2024-11-11 20:21:13,730 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-11 20:21:13,730 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 118 transitions. [2024-11-11 20:21:13,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-11 20:21:13,731 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 20:21:13,731 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 20:21:13,749 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-11 20:21:13,935 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 20:21:13,936 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 20:21:13,936 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 20:21:13,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1470880860, now seen corresponding path program 1 times [2024-11-11 20:21:13,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 20:21:13,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518474780] [2024-11-11 20:21:13,937 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 20:21:13,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 20:21:13,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-11 20:21:13,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [745706141] [2024-11-11 20:21:13,954 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 20:21:13,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 20:21:13,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 20:21:13,956 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) [2024-11-11 20:21:13,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-11 20:21:14,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:21:14,007 INFO L256 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-11 20:21:14,009 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 20:21:14,071 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-11 20:21:14,072 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 20:21:14,146 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-11 20:21:14,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 20:21:14,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518474780] [2024-11-11 20:21:14,147 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-11 20:21:14,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745706141] [2024-11-11 20:21:14,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745706141] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 20:21:14,147 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-11 20:21:14,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2024-11-11 20:21:14,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737620014] [2024-11-11 20:21:14,147 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-11 20:21:14,148 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-11 20:21:14,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 20:21:14,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-11 20:21:14,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-11-11 20:21:14,148 INFO L87 Difference]: Start difference. First operand 100 states and 118 transitions. Second operand has 11 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-11 20:21:14,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 20:21:14,246 INFO L93 Difference]: Finished difference Result 114 states and 131 transitions. [2024-11-11 20:21:14,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-11 20:21:14,246 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 26 [2024-11-11 20:21:14,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 20:21:14,248 INFO L225 Difference]: With dead ends: 114 [2024-11-11 20:21:14,249 INFO L226 Difference]: Without dead ends: 99 [2024-11-11 20:21:14,249 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2024-11-11 20:21:14,250 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 8 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-11 20:21:14,250 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 81 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-11 20:21:14,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2024-11-11 20:21:14,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 96. [2024-11-11 20:21:14,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 77 states have (on average 1.155844155844156) internal successors, (89), 79 states have internal predecessors, (89), 10 states have call successors, (10), 8 states have call predecessors, (10), 8 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-11 20:21:14,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 108 transitions. [2024-11-11 20:21:14,272 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 108 transitions. Word has length 26 [2024-11-11 20:21:14,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 20:21:14,276 INFO L471 AbstractCegarLoop]: Abstraction has 96 states and 108 transitions. [2024-11-11 20:21:14,276 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-11 20:21:14,276 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 108 transitions. [2024-11-11 20:21:14,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-11 20:21:14,277 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 20:21:14,277 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 20:21:14,290 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-11 20:21:14,477 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 20:21:14,478 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 20:21:14,478 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 20:21:14,478 INFO L85 PathProgramCache]: Analyzing trace with hash 103630759, now seen corresponding path program 1 times [2024-11-11 20:21:14,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 20:21:14,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41598135] [2024-11-11 20:21:14,479 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 20:21:14,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 20:21:14,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-11 20:21:14,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1093436115] [2024-11-11 20:21:14,497 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 20:21:14,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 20:21:14,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 20:21:14,499 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) [2024-11-11 20:21:14,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-11 20:21:14,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:21:14,550 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-11 20:21:14,554 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 20:21:14,927 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-11 20:21:14,927 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 20:21:22,922 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-11 20:21:22,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 20:21:22,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41598135] [2024-11-11 20:21:22,922 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-11 20:21:22,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093436115] [2024-11-11 20:21:22,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093436115] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 20:21:22,922 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-11 20:21:22,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2024-11-11 20:21:22,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109387613] [2024-11-11 20:21:22,923 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-11 20:21:22,923 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-11 20:21:22,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 20:21:22,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-11 20:21:22,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2024-11-11 20:21:22,924 INFO L87 Difference]: Start difference. First operand 96 states and 108 transitions. Second operand has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 15 states have internal predecessors, (37), 6 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-11 20:21:31,144 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-11 20:21:31,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 20:21:31,784 INFO L93 Difference]: Finished difference Result 139 states and 159 transitions. [2024-11-11 20:21:31,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-11 20:21:31,784 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 15 states have internal predecessors, (37), 6 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 30 [2024-11-11 20:21:31,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 20:21:31,785 INFO L225 Difference]: With dead ends: 139 [2024-11-11 20:21:31,785 INFO L226 Difference]: Without dead ends: 137 [2024-11-11 20:21:31,786 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=103, Invalid=359, Unknown=0, NotChecked=0, Total=462 [2024-11-11 20:21:31,787 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 16 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 14 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2024-11-11 20:21:31,787 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 197 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 225 Invalid, 1 Unknown, 0 Unchecked, 5.3s Time] [2024-11-11 20:21:31,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2024-11-11 20:21:31,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 133. [2024-11-11 20:21:31,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 109 states have (on average 1.165137614678899) internal successors, (127), 110 states have internal predecessors, (127), 13 states have call successors, (13), 10 states have call predecessors, (13), 10 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-11-11 20:21:31,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 152 transitions. [2024-11-11 20:21:31,802 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 152 transitions. Word has length 30 [2024-11-11 20:21:31,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 20:21:31,802 INFO L471 AbstractCegarLoop]: Abstraction has 133 states and 152 transitions. [2024-11-11 20:21:31,802 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 15 states have internal predecessors, (37), 6 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-11 20:21:31,803 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 152 transitions. [2024-11-11 20:21:31,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-11 20:21:31,804 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 20:21:31,804 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 20:21:31,819 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-11 20:21:32,004 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 20:21:32,005 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 20:21:32,005 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 20:21:32,006 INFO L85 PathProgramCache]: Analyzing trace with hash -667620151, now seen corresponding path program 2 times [2024-11-11 20:21:32,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 20:21:32,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080764380] [2024-11-11 20:21:32,006 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 20:21:32,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 20:21:32,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-11 20:21:32,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1677181156] [2024-11-11 20:21:32,050 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-11 20:21:32,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 20:21:32,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 20:21:32,052 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) [2024-11-11 20:21:32,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-11 20:21:32,108 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-11 20:21:32,108 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-11 20:21:32,109 INFO L256 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-11-11 20:21:32,111 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 20:21:34,095 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 7 proven. 32 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-11 20:21:34,095 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 20:21:35,189 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 29 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-11 20:21:35,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 20:21:35,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080764380] [2024-11-11 20:21:35,190 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-11 20:21:35,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677181156] [2024-11-11 20:21:35,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677181156] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 20:21:35,190 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-11 20:21:35,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 22 [2024-11-11 20:21:35,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220049652] [2024-11-11 20:21:35,190 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-11 20:21:35,191 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-11 20:21:35,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 20:21:35,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-11 20:21:35,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2024-11-11 20:21:35,192 INFO L87 Difference]: Start difference. First operand 133 states and 152 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-11 20:21:36,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 20:21:36,923 INFO L93 Difference]: Finished difference Result 181 states and 214 transitions. [2024-11-11 20:21:36,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-11 20:21:36,925 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 40 [2024-11-11 20:21:36,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 20:21:36,926 INFO L225 Difference]: With dead ends: 181 [2024-11-11 20:21:36,926 INFO L226 Difference]: Without dead ends: 179 [2024-11-11 20:21:36,927 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 58 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=197, Invalid=673, Unknown=0, NotChecked=0, Total=870 [2024-11-11 20:21:36,928 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 44 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-11 20:21:36,928 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 227 Invalid, 341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 324 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-11 20:21:36,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2024-11-11 20:21:36,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 162. [2024-11-11 20:21:36,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 132 states have (on average 1.1893939393939394) internal successors, (157), 134 states have internal predecessors, (157), 18 states have call successors, (18), 11 states have call predecessors, (18), 11 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2024-11-11 20:21:36,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 192 transitions. [2024-11-11 20:21:36,968 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 192 transitions. Word has length 40 [2024-11-11 20:21:36,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 20:21:36,969 INFO L471 AbstractCegarLoop]: Abstraction has 162 states and 192 transitions. [2024-11-11 20:21:36,969 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-11 20:21:36,969 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 192 transitions. [2024-11-11 20:21:36,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-11 20:21:36,973 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 20:21:36,973 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 20:21:36,991 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-11 20:21:37,173 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 20:21:37,174 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 20:21:37,174 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 20:21:37,175 INFO L85 PathProgramCache]: Analyzing trace with hash -957536403, now seen corresponding path program 2 times [2024-11-11 20:21:37,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 20:21:37,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504349377] [2024-11-11 20:21:37,175 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 20:21:37,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 20:21:37,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:21:37,384 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-11-11 20:21:37,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:21:37,390 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-11-11 20:21:37,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:21:37,393 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-11-11 20:21:37,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:21:37,400 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-11-11 20:21:37,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:21:37,403 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 8 proven. 44 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-11 20:21:37,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 20:21:37,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504349377] [2024-11-11 20:21:37,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504349377] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 20:21:37,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585681665] [2024-11-11 20:21:37,404 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-11 20:21:37,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 20:21:37,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 20:21:37,406 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) [2024-11-11 20:21:37,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-11 20:21:37,463 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-11 20:21:37,464 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-11 20:21:37,465 INFO L256 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-11 20:21:37,467 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 20:21:37,525 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 8 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-11 20:21:37,525 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 20:21:37,642 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 8 proven. 44 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-11 20:21:37,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585681665] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 20:21:37,642 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-11 20:21:37,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 14 [2024-11-11 20:21:37,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966886010] [2024-11-11 20:21:37,643 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-11 20:21:37,643 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-11 20:21:37,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 20:21:37,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-11 20:21:37,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2024-11-11 20:21:37,644 INFO L87 Difference]: Start difference. First operand 162 states and 192 transitions. Second operand has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 states have internal predecessors, (70), 9 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) [2024-11-11 20:21:37,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 20:21:37,821 INFO L93 Difference]: Finished difference Result 528 states and 643 transitions. [2024-11-11 20:21:37,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-11 20:21:37,821 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 states have internal predecessors, (70), 9 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) Word has length 50 [2024-11-11 20:21:37,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 20:21:37,825 INFO L225 Difference]: With dead ends: 528 [2024-11-11 20:21:37,825 INFO L226 Difference]: Without dead ends: 521 [2024-11-11 20:21:37,826 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=184, Invalid=322, Unknown=0, NotChecked=0, Total=506 [2024-11-11 20:21:37,826 INFO L435 NwaCegarLoop]: 17 mSDtfsCounter, 81 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-11 20:21:37,826 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 135 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-11 20:21:37,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2024-11-11 20:21:37,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 358. [2024-11-11 20:21:37,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 287 states have (on average 1.146341463414634) internal successors, (329), 296 states have internal predecessors, (329), 41 states have call successors, (41), 29 states have call predecessors, (41), 29 states have return successors, (40), 32 states have call predecessors, (40), 40 states have call successors, (40) [2024-11-11 20:21:37,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 410 transitions. [2024-11-11 20:21:37,867 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 410 transitions. Word has length 50 [2024-11-11 20:21:37,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 20:21:37,867 INFO L471 AbstractCegarLoop]: Abstraction has 358 states and 410 transitions. [2024-11-11 20:21:37,867 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 states have internal predecessors, (70), 9 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) [2024-11-11 20:21:37,867 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 410 transitions. [2024-11-11 20:21:37,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-11 20:21:37,869 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 20:21:37,869 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-11 20:21:37,889 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-11 20:21:38,075 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,SelfDestructingSolverStorable10 [2024-11-11 20:21:38,076 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 20:21:38,076 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 20:21:38,077 INFO L85 PathProgramCache]: Analyzing trace with hash 535727021, now seen corresponding path program 3 times [2024-11-11 20:21:38,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 20:21:38,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670641074] [2024-11-11 20:21:38,077 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 20:21:38,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 20:21:38,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-11 20:21:38,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [360890259] [2024-11-11 20:21:38,098 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-11 20:21:38,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 20:21:38,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 20:21:38,103 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) [2024-11-11 20:21:38,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-11 20:21:38,153 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-11 20:21:38,153 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-11 20:21:38,154 INFO L256 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-11 20:21:38,156 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 20:21:43,359 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 62 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-11 20:21:43,359 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 20:21:45,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 20:21:45,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670641074] [2024-11-11 20:21:45,284 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-11 20:21:45,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360890259] [2024-11-11 20:21:45,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360890259] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 20:21:45,284 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-11 20:21:45,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2024-11-11 20:21:45,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469193701] [2024-11-11 20:21:45,285 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-11 20:21:45,285 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-11 20:21:45,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 20:21:45,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-11 20:21:45,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2024-11-11 20:21:45,286 INFO L87 Difference]: Start difference. First operand 358 states and 410 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 12 states have internal predecessors, (33), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-11 20:21:46,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 20:21:46,664 INFO L93 Difference]: Finished difference Result 492 states and 560 transitions. [2024-11-11 20:21:46,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-11 20:21:46,664 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 12 states have internal predecessors, (33), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 50 [2024-11-11 20:21:46,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 20:21:46,667 INFO L225 Difference]: With dead ends: 492 [2024-11-11 20:21:46,667 INFO L226 Difference]: Without dead ends: 490 [2024-11-11 20:21:46,668 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 46 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=127, Invalid=379, Unknown=0, NotChecked=0, Total=506 [2024-11-11 20:21:46,668 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 9 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-11 20:21:46,669 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 171 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-11 20:21:46,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2024-11-11 20:21:46,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 274. [2024-11-11 20:21:46,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 219 states have (on average 1.1369863013698631) internal successors, (249), 224 states have internal predecessors, (249), 30 states have call successors, (30), 24 states have call predecessors, (30), 24 states have return successors, (29), 25 states have call predecessors, (29), 29 states have call successors, (29) [2024-11-11 20:21:46,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 308 transitions. [2024-11-11 20:21:46,718 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 308 transitions. Word has length 50 [2024-11-11 20:21:46,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 20:21:46,719 INFO L471 AbstractCegarLoop]: Abstraction has 274 states and 308 transitions. [2024-11-11 20:21:46,719 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 12 states have internal predecessors, (33), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-11 20:21:46,719 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 308 transitions. [2024-11-11 20:21:46,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2024-11-11 20:21:46,721 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 20:21:46,721 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1] [2024-11-11 20:21:46,737 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-11 20:21:46,925 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 20:21:46,925 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 20:21:46,926 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 20:21:46,926 INFO L85 PathProgramCache]: Analyzing trace with hash 319909007, now seen corresponding path program 2 times [2024-11-11 20:21:46,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 20:21:46,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20408922] [2024-11-11 20:21:46,926 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 20:21:46,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 20:21:46,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-11 20:21:46,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1513733175] [2024-11-11 20:21:46,965 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-11 20:21:46,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 20:21:46,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 20:21:46,967 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) [2024-11-11 20:21:46,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-11 20:21:47,037 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-11 20:21:47,037 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-11 20:21:47,038 INFO L256 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-11-11 20:21:47,041 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 20:21:50,947 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 19 proven. 160 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-11-11 20:21:50,947 INFO L312 TraceCheckSpWp]: Computing backward predicates...