./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/ps6-ll_unwindbound50.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3289d67d 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/ps6-ll_unwindbound50.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 5bfe5681b6d73d5859a119345279b9da165675f4eb4d814fdf24f92881f7a27f --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-3289d67-m [2024-11-16 07:23:06,761 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-16 07:23:06,818 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-16 07:23:06,824 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-16 07:23:06,825 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-16 07:23:06,852 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-16 07:23:06,853 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-16 07:23:06,853 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-16 07:23:06,854 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-16 07:23:06,857 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-16 07:23:06,858 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-16 07:23:06,858 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-16 07:23:06,859 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-16 07:23:06,859 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-16 07:23:06,859 INFO L153 SettingsManager]: * Use SBE=true [2024-11-16 07:23:06,859 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-16 07:23:06,860 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-16 07:23:06,860 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-16 07:23:06,860 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-16 07:23:06,860 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-16 07:23:06,860 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-16 07:23:06,862 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-16 07:23:06,862 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-16 07:23:06,863 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-16 07:23:06,863 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-16 07:23:06,863 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-16 07:23:06,863 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-16 07:23:06,864 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-16 07:23:06,864 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-16 07:23:06,864 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-16 07:23:06,865 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-16 07:23:06,865 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-16 07:23:06,865 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-16 07:23:06,866 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-16 07:23:06,866 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-16 07:23:06,866 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-16 07:23:06,867 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-16 07:23:06,867 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-16 07:23:06,868 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-16 07:23:06,868 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-16 07:23:06,868 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-16 07:23:06,868 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-16 07:23:06,869 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5bfe5681b6d73d5859a119345279b9da165675f4eb4d814fdf24f92881f7a27f [2024-11-16 07:23:07,094 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-16 07:23:07,120 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-16 07:23:07,122 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-16 07:23:07,123 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-16 07:23:07,124 INFO L274 PluginConnector]: CDTParser initialized [2024-11-16 07:23:07,125 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/ps6-ll_unwindbound50.c [2024-11-16 07:23:08,554 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-16 07:23:08,737 INFO L384 CDTParser]: Found 1 translation units. [2024-11-16 07:23:08,738 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/ps6-ll_unwindbound50.c [2024-11-16 07:23:08,744 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3ed6bfbe1/85a69bbb61fa4ec39d5d36d7cdc8dfbd/FLAG83f51648f [2024-11-16 07:23:08,757 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3ed6bfbe1/85a69bbb61fa4ec39d5d36d7cdc8dfbd [2024-11-16 07:23:08,759 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-16 07:23:08,761 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-16 07:23:08,762 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-16 07:23:08,762 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-16 07:23:08,769 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-16 07:23:08,770 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 07:23:08" (1/1) ... [2024-11-16 07:23:08,771 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@523eae04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:23:08, skipping insertion in model container [2024-11-16 07:23:08,771 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 07:23:08" (1/1) ... [2024-11-16 07:23:08,792 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-16 07:23:08,965 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/ps6-ll_unwindbound50.c[458,471] [2024-11-16 07:23:08,984 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-16 07:23:08,992 INFO L200 MainTranslator]: Completed pre-run [2024-11-16 07:23:09,007 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/ps6-ll_unwindbound50.c[458,471] [2024-11-16 07:23:09,014 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-16 07:23:09,031 INFO L204 MainTranslator]: Completed translation [2024-11-16 07:23:09,032 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:23:09 WrapperNode [2024-11-16 07:23:09,032 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-16 07:23:09,033 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-16 07:23:09,033 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-16 07:23:09,034 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-16 07:23:09,039 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:23:09" (1/1) ... [2024-11-16 07:23:09,044 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:23:09" (1/1) ... [2024-11-16 07:23:09,057 INFO L138 Inliner]: procedures = 14, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 42 [2024-11-16 07:23:09,057 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-16 07:23:09,058 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-16 07:23:09,058 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-16 07:23:09,058 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-16 07:23:09,067 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:23:09" (1/1) ... [2024-11-16 07:23:09,067 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:23:09" (1/1) ... [2024-11-16 07:23:09,068 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:23:09" (1/1) ... [2024-11-16 07:23:09,079 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]. [2024-11-16 07:23:09,079 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:23:09" (1/1) ... [2024-11-16 07:23:09,080 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:23:09" (1/1) ... [2024-11-16 07:23:09,082 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:23:09" (1/1) ... [2024-11-16 07:23:09,082 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:23:09" (1/1) ... [2024-11-16 07:23:09,083 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:23:09" (1/1) ... [2024-11-16 07:23:09,084 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:23:09" (1/1) ... [2024-11-16 07:23:09,085 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-16 07:23:09,086 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-16 07:23:09,086 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-16 07:23:09,086 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-16 07:23:09,087 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:23:09" (1/1) ... [2024-11-16 07:23:09,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-16 07:23:09,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 07:23:09,120 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) [2024-11-16 07:23:09,138 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 [2024-11-16 07:23:09,184 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-16 07:23:09,185 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-16 07:23:09,185 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-16 07:23:09,185 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-16 07:23:09,185 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-16 07:23:09,185 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-16 07:23:09,250 INFO L256 CfgBuilder]: Building ICFG [2024-11-16 07:23:09,254 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-16 07:23:09,438 INFO L? ?]: Removed 7 outVars from TransFormulas that were not future-live. [2024-11-16 07:23:09,440 INFO L307 CfgBuilder]: Performing block encoding [2024-11-16 07:23:09,454 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-16 07:23:09,455 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-16 07:23:09,455 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.11 07:23:09 BoogieIcfgContainer [2024-11-16 07:23:09,456 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-16 07:23:09,460 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-16 07:23:09,460 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-16 07:23:09,463 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-16 07:23:09,464 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 07:23:08" (1/3) ... [2024-11-16 07:23:09,464 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@546b6088 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 07:23:09, skipping insertion in model container [2024-11-16 07:23:09,465 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:23:09" (2/3) ... [2024-11-16 07:23:09,465 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@546b6088 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 07:23:09, skipping insertion in model container [2024-11-16 07:23:09,466 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.11 07:23:09" (3/3) ... [2024-11-16 07:23:09,468 INFO L112 eAbstractionObserver]: Analyzing ICFG ps6-ll_unwindbound50.c [2024-11-16 07:23:09,487 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-16 07:23:09,487 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-16 07:23:09,554 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-16 07:23:09,562 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;@1992e4c4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-16 07:23:09,562 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-16 07:23:09,566 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 15 states have (on average 1.4) internal successors, (21), 16 states have internal predecessors, (21), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-16 07:23:09,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-16 07:23:09,572 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 07:23:09,573 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 07:23:09,573 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 07:23:09,578 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 07:23:09,579 INFO L85 PathProgramCache]: Analyzing trace with hash 353857931, now seen corresponding path program 1 times [2024-11-16 07:23:09,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 07:23:09,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736064460] [2024-11-16 07:23:09,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 07:23:09,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 07:23:09,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:23:09,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 07:23:09,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 07:23:09,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736064460] [2024-11-16 07:23:09,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736064460] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 07:23:09,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 07:23:09,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-16 07:23:09,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133451420] [2024-11-16 07:23:09,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 07:23:09,745 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-16 07:23:09,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 07:23:09,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-16 07:23:09,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-16 07:23:09,766 INFO L87 Difference]: Start difference. First operand has 21 states, 15 states have (on average 1.4) internal successors, (21), 16 states have internal predecessors, (21), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 07:23:09,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 07:23:09,781 INFO L93 Difference]: Finished difference Result 39 states and 53 transitions. [2024-11-16 07:23:09,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-16 07:23:09,783 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-11-16 07:23:09,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 07:23:09,788 INFO L225 Difference]: With dead ends: 39 [2024-11-16 07:23:09,789 INFO L226 Difference]: Without dead ends: 17 [2024-11-16 07:23:09,791 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-16 07:23:09,794 INFO L432 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 [2024-11-16 07:23:09,795 INFO L433 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] [2024-11-16 07:23:09,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2024-11-16 07:23:09,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2024-11-16 07:23:09,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-16 07:23:09,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2024-11-16 07:23:09,827 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 10 [2024-11-16 07:23:09,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 07:23:09,828 INFO L471 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2024-11-16 07:23:09,828 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 07:23:09,828 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2024-11-16 07:23:09,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-16 07:23:09,830 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 07:23:09,830 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 07:23:09,830 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-16 07:23:09,831 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 07:23:09,831 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 07:23:09,832 INFO L85 PathProgramCache]: Analyzing trace with hash 951958398, now seen corresponding path program 1 times [2024-11-16 07:23:09,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 07:23:09,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971130934] [2024-11-16 07:23:09,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 07:23:09,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 07:23:09,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:23:09,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 07:23:09,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 07:23:09,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971130934] [2024-11-16 07:23:09,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971130934] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 07:23:09,981 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 07:23:09,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-16 07:23:09,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776259595] [2024-11-16 07:23:09,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 07:23:09,982 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-16 07:23:09,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 07:23:09,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-16 07:23:09,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-16 07:23:09,986 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 07:23:10,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 07:23:10,010 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2024-11-16 07:23:10,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-16 07:23:10,011 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-11-16 07:23:10,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 07:23:10,012 INFO L225 Difference]: With dead ends: 28 [2024-11-16 07:23:10,012 INFO L226 Difference]: Without dead ends: 19 [2024-11-16 07:23:10,013 INFO L431 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 [2024-11-16 07:23:10,014 INFO L432 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 [2024-11-16 07:23:10,014 INFO L433 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] [2024-11-16 07:23:10,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2024-11-16 07:23:10,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2024-11-16 07:23:10,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 15 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-16 07:23:10,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2024-11-16 07:23:10,026 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 11 [2024-11-16 07:23:10,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 07:23:10,027 INFO L471 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2024-11-16 07:23:10,027 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 07:23:10,027 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2024-11-16 07:23:10,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-16 07:23:10,028 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 07:23:10,028 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 07:23:10,029 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-16 07:23:10,030 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 07:23:10,034 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 07:23:10,034 INFO L85 PathProgramCache]: Analyzing trace with hash 982434591, now seen corresponding path program 1 times [2024-11-16 07:23:10,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 07:23:10,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419495770] [2024-11-16 07:23:10,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 07:23:10,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 07:23:10,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-16 07:23:10,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1308427476] [2024-11-16 07:23:10,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 07:23:10,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 07:23:10,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 07:23:10,067 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) [2024-11-16 07:23:10,069 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-16 07:23:10,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:23:10,135 INFO L255 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-16 07:23:10,142 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 07:23:10,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 07:23:10,237 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-16 07:23:10,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 07:23:10,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419495770] [2024-11-16 07:23:10,238 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-16 07:23:10,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308427476] [2024-11-16 07:23:10,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308427476] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 07:23:10,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 07:23:10,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-16 07:23:10,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095997538] [2024-11-16 07:23:10,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 07:23:10,241 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-16 07:23:10,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 07:23:10,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-16 07:23:10,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-16 07:23:10,245 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 07:23:10,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 07:23:10,294 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2024-11-16 07:23:10,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-16 07:23:10,295 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-11-16 07:23:10,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 07:23:10,296 INFO L225 Difference]: With dead ends: 30 [2024-11-16 07:23:10,296 INFO L226 Difference]: Without dead ends: 25 [2024-11-16 07:23:10,297 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-16 07:23:10,299 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 4 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-16 07:23:10,300 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 63 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-16 07:23:10,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2024-11-16 07:23:10,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2024-11-16 07:23:10,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 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) [2024-11-16 07:23:10,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2024-11-16 07:23:10,311 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 11 [2024-11-16 07:23:10,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 07:23:10,311 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2024-11-16 07:23:10,312 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 07:23:10,312 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2024-11-16 07:23:10,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-16 07:23:10,313 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 07:23:10,313 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 07:23:10,328 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-16 07:23:10,516 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 [2024-11-16 07:23:10,517 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 07:23:10,517 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 07:23:10,518 INFO L85 PathProgramCache]: Analyzing trace with hash 1927902363, now seen corresponding path program 1 times [2024-11-16 07:23:10,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 07:23:10,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304612535] [2024-11-16 07:23:10,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 07:23:10,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 07:23:10,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:23:10,674 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-11-16 07:23:10,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:23:10,694 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 07:23:10,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 07:23:10,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304612535] [2024-11-16 07:23:10,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304612535] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 07:23:10,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945435654] [2024-11-16 07:23:10,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 07:23:10,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 07:23:10,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 07:23:10,699 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) [2024-11-16 07:23:10,700 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-16 07:23:10,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:23:10,762 INFO L255 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-16 07:23:10,763 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 07:23:10,810 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 07:23:10,811 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 07:23:10,876 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 07:23:10,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945435654] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 07:23:10,876 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 07:23:10,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 5] total 10 [2024-11-16 07:23:10,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860537955] [2024-11-16 07:23:10,877 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 07:23:10,877 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-16 07:23:10,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 07:23:10,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-16 07:23:10,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-11-16 07:23:10,879 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 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) [2024-11-16 07:23:10,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 07:23:10,986 INFO L93 Difference]: Finished difference Result 62 states and 72 transitions. [2024-11-16 07:23:10,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-16 07:23:10,987 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 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 19 [2024-11-16 07:23:10,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 07:23:10,988 INFO L225 Difference]: With dead ends: 62 [2024-11-16 07:23:10,990 INFO L226 Difference]: Without dead ends: 53 [2024-11-16 07:23:10,990 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2024-11-16 07:23:10,991 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 25 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-16 07:23:10,992 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 70 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-16 07:23:10,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-11-16 07:23:11,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 47. [2024-11-16 07:23:11,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 32 states have (on average 1.21875) internal successors, (39), 35 states have internal predecessors, (39), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-16 07:23:11,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 56 transitions. [2024-11-16 07:23:11,005 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 56 transitions. Word has length 19 [2024-11-16 07:23:11,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 07:23:11,005 INFO L471 AbstractCegarLoop]: Abstraction has 47 states and 56 transitions. [2024-11-16 07:23:11,005 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 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) [2024-11-16 07:23:11,005 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 56 transitions. [2024-11-16 07:23:11,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-16 07:23:11,006 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 07:23:11,007 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 07:23:11,022 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-16 07:23:11,210 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2024-11-16 07:23:11,211 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 07:23:11,211 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 07:23:11,211 INFO L85 PathProgramCache]: Analyzing trace with hash 1958378556, now seen corresponding path program 1 times [2024-11-16 07:23:11,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 07:23:11,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170475624] [2024-11-16 07:23:11,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 07:23:11,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 07:23:11,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-16 07:23:11,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1701962909] [2024-11-16 07:23:11,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 07:23:11,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 07:23:11,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 07:23:11,236 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) [2024-11-16 07:23:11,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-16 07:23:11,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:23:11,281 INFO L255 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-16 07:23:11,283 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 07:23:11,363 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 07:23:11,363 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 07:23:11,481 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-16 07:23:11,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 07:23:11,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170475624] [2024-11-16 07:23:11,481 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-16 07:23:11,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701962909] [2024-11-16 07:23:11,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701962909] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-16 07:23:11,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-16 07:23:11,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2024-11-16 07:23:11,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663753238] [2024-11-16 07:23:11,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 07:23:11,484 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-16 07:23:11,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 07:23:11,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-16 07:23:11,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-16 07:23:11,485 INFO L87 Difference]: Start difference. First operand 47 states and 56 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-16 07:23:11,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 07:23:11,562 INFO L93 Difference]: Finished difference Result 62 states and 70 transitions. [2024-11-16 07:23:11,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-16 07:23:11,562 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2024-11-16 07:23:11,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 07:23:11,563 INFO L225 Difference]: With dead ends: 62 [2024-11-16 07:23:11,563 INFO L226 Difference]: Without dead ends: 53 [2024-11-16 07:23:11,563 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-11-16 07:23:11,564 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 5 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-16 07:23:11,564 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 51 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-16 07:23:11,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-11-16 07:23:11,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 47. [2024-11-16 07:23:11,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 36 states have internal predecessors, (38), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-16 07:23:11,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2024-11-16 07:23:11,582 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 19 [2024-11-16 07:23:11,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 07:23:11,583 INFO L471 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2024-11-16 07:23:11,583 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-16 07:23:11,583 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2024-11-16 07:23:11,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-16 07:23:11,584 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 07:23:11,584 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 07:23:11,601 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-16 07:23:11,784 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 07:23:11,785 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 07:23:11,786 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 07:23:11,786 INFO L85 PathProgramCache]: Analyzing trace with hash -219977158, now seen corresponding path program 1 times [2024-11-16 07:23:11,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 07:23:11,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113030376] [2024-11-16 07:23:11,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 07:23:11,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 07:23:11,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-16 07:23:11,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1156931487] [2024-11-16 07:23:11,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 07:23:11,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 07:23:11,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 07:23:11,805 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) [2024-11-16 07:23:11,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-16 07:23:11,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:23:11,851 INFO L255 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-16 07:23:11,853 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 07:23:11,954 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-16 07:23:11,954 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 07:23:12,064 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-16 07:23:12,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 07:23:12,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113030376] [2024-11-16 07:23:12,065 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-16 07:23:12,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156931487] [2024-11-16 07:23:12,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156931487] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 07:23:12,065 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-16 07:23:12,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2024-11-16 07:23:12,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794495715] [2024-11-16 07:23:12,066 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-16 07:23:12,066 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-16 07:23:12,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 07:23:12,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-16 07:23:12,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-11-16 07:23:12,067 INFO L87 Difference]: Start difference. First operand 47 states and 53 transitions. Second operand has 10 states, 8 states have (on average 3.0) internal successors, (24), 9 states have internal predecessors, (24), 6 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-16 07:23:12,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 07:23:12,183 INFO L93 Difference]: Finished difference Result 57 states and 65 transitions. [2024-11-16 07:23:12,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-16 07:23:12,183 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 3.0) internal successors, (24), 9 states have internal predecessors, (24), 6 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 30 [2024-11-16 07:23:12,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 07:23:12,184 INFO L225 Difference]: With dead ends: 57 [2024-11-16 07:23:12,184 INFO L226 Difference]: Without dead ends: 47 [2024-11-16 07:23:12,185 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2024-11-16 07:23:12,186 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 1 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-16 07:23:12,186 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 111 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-16 07:23:12,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-11-16 07:23:12,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2024-11-16 07:23:12,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 35 states have internal predecessors, (37), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-16 07:23:12,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2024-11-16 07:23:12,201 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 30 [2024-11-16 07:23:12,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 07:23:12,201 INFO L471 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2024-11-16 07:23:12,201 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 3.0) internal successors, (24), 9 states have internal predecessors, (24), 6 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-16 07:23:12,202 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2024-11-16 07:23:12,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-16 07:23:12,203 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 07:23:12,203 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 07:23:12,221 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-16 07:23:12,406 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 07:23:12,407 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 07:23:12,407 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 07:23:12,407 INFO L85 PathProgramCache]: Analyzing trace with hash -213434944, now seen corresponding path program 1 times [2024-11-16 07:23:12,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 07:23:12,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813056099] [2024-11-16 07:23:12,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 07:23:12,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 07:23:12,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:23:12,647 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-11-16 07:23:12,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:23:12,656 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-11-16 07:23:12,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:23:12,661 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-11-16 07:23:12,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:23:12,666 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-11-16 07:23:12,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:23:12,674 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-11-16 07:23:12,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:23:12,677 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-16 07:23:12,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 07:23:12,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813056099] [2024-11-16 07:23:12,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813056099] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 07:23:12,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514190735] [2024-11-16 07:23:12,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 07:23:12,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 07:23:12,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 07:23:12,684 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) [2024-11-16 07:23:12,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-16 07:23:12,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:23:12,758 INFO L255 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-16 07:23:12,760 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 07:23:12,828 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 24 proven. 56 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 07:23:12,829 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 07:23:12,958 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-16 07:23:12,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514190735] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 07:23:12,958 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 07:23:12,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 8] total 16 [2024-11-16 07:23:12,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220025035] [2024-11-16 07:23:12,959 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 07:23:12,959 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-16 07:23:12,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 07:23:12,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-16 07:23:12,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2024-11-16 07:23:12,960 INFO L87 Difference]: Start difference. First operand 47 states and 50 transitions. Second operand has 16 states, 16 states have (on average 3.9375) internal successors, (63), 16 states have internal predecessors, (63), 9 states have call successors, (15), 6 states have call predecessors, (15), 6 states have return successors, (14), 9 states have call predecessors, (14), 9 states have call successors, (14) [2024-11-16 07:23:13,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 07:23:13,217 INFO L93 Difference]: Finished difference Result 139 states and 151 transitions. [2024-11-16 07:23:13,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-16 07:23:13,218 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.9375) internal successors, (63), 16 states have internal predecessors, (63), 9 states have call successors, (15), 6 states have call predecessors, (15), 6 states have return successors, (14), 9 states have call predecessors, (14), 9 states have call successors, (14) Word has length 48 [2024-11-16 07:23:13,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 07:23:13,220 INFO L225 Difference]: With dead ends: 139 [2024-11-16 07:23:13,220 INFO L226 Difference]: Without dead ends: 128 [2024-11-16 07:23:13,223 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=196, Invalid=356, Unknown=0, NotChecked=0, Total=552 [2024-11-16 07:23:13,224 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 86 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-16 07:23:13,224 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 139 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-16 07:23:13,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2024-11-16 07:23:13,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 98. [2024-11-16 07:23:13,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 70 states have (on average 1.1) internal successors, (77), 75 states have internal predecessors, (77), 17 states have call successors, (17), 11 states have call predecessors, (17), 10 states have return successors, (16), 11 states have call predecessors, (16), 16 states have call successors, (16) [2024-11-16 07:23:13,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 110 transitions. [2024-11-16 07:23:13,256 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 110 transitions. Word has length 48 [2024-11-16 07:23:13,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 07:23:13,256 INFO L471 AbstractCegarLoop]: Abstraction has 98 states and 110 transitions. [2024-11-16 07:23:13,257 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.9375) internal successors, (63), 16 states have internal predecessors, (63), 9 states have call successors, (15), 6 states have call predecessors, (15), 6 states have return successors, (14), 9 states have call predecessors, (14), 9 states have call successors, (14) [2024-11-16 07:23:13,257 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 110 transitions. [2024-11-16 07:23:13,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-16 07:23:13,258 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 07:23:13,258 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 07:23:13,275 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-16 07:23:13,458 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 07:23:13,459 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 07:23:13,459 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 07:23:13,459 INFO L85 PathProgramCache]: Analyzing trace with hash -1645617021, now seen corresponding path program 2 times [2024-11-16 07:23:13,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 07:23:13,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991491409] [2024-11-16 07:23:13,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 07:23:13,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 07:23:13,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-16 07:23:13,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [46049903] [2024-11-16 07:23:13,484 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-16 07:23:13,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 07:23:13,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 07:23:13,486 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) [2024-11-16 07:23:13,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-16 07:23:13,546 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-16 07:23:13,546 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 07:23:13,548 INFO L255 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 56 conjuncts are in the unsatisfiable core [2024-11-16 07:23:13,554 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 07:23:13,946 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 31 proven. 45 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-16 07:23:13,946 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 07:23:15,642 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 26 proven. 41 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-16 07:23:15,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 07:23:15,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991491409] [2024-11-16 07:23:15,642 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-16 07:23:15,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46049903] [2024-11-16 07:23:15,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46049903] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 07:23:15,642 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-16 07:23:15,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 24 [2024-11-16 07:23:15,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561587426] [2024-11-16 07:23:15,643 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-16 07:23:15,643 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-16 07:23:15,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 07:23:15,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-16 07:23:15,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2024-11-16 07:23:15,645 INFO L87 Difference]: Start difference. First operand 98 states and 110 transitions. Second operand has 24 states, 20 states have (on average 2.55) internal successors, (51), 21 states have internal predecessors, (51), 14 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-11-16 07:23:16,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 07:23:16,307 INFO L93 Difference]: Finished difference Result 105 states and 116 transitions. [2024-11-16 07:23:16,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-16 07:23:16,308 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 20 states have (on average 2.55) internal successors, (51), 21 states have internal predecessors, (51), 14 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Word has length 54 [2024-11-16 07:23:16,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 07:23:16,310 INFO L225 Difference]: With dead ends: 105 [2024-11-16 07:23:16,310 INFO L226 Difference]: Without dead ends: 93 [2024-11-16 07:23:16,311 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=202, Invalid=988, Unknown=0, NotChecked=0, Total=1190 [2024-11-16 07:23:16,312 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 25 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-16 07:23:16,313 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 277 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-16 07:23:16,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2024-11-16 07:23:16,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2024-11-16 07:23:16,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 70 states have (on average 1.0285714285714285) internal successors, (72), 70 states have internal predecessors, (72), 12 states have call successors, (12), 11 states have call predecessors, (12), 10 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-11-16 07:23:16,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 95 transitions. [2024-11-16 07:23:16,349 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 95 transitions. Word has length 54 [2024-11-16 07:23:16,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 07:23:16,351 INFO L471 AbstractCegarLoop]: Abstraction has 93 states and 95 transitions. [2024-11-16 07:23:16,352 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 20 states have (on average 2.55) internal successors, (51), 21 states have internal predecessors, (51), 14 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-11-16 07:23:16,353 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 95 transitions. [2024-11-16 07:23:16,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2024-11-16 07:23:16,356 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 07:23:16,356 INFO L215 NwaCegarLoop]: trace histogram [12, 11, 11, 10, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 07:23:16,377 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-16 07:23:16,556 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 07:23:16,557 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 07:23:16,557 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 07:23:16,557 INFO L85 PathProgramCache]: Analyzing trace with hash -1956752302, now seen corresponding path program 3 times [2024-11-16 07:23:16,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 07:23:16,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157255358] [2024-11-16 07:23:16,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 07:23:16,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 07:23:16,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-16 07:23:16,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [979050596] [2024-11-16 07:23:16,604 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-16 07:23:16,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 07:23:16,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 07:23:16,606 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) [2024-11-16 07:23:16,610 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-16 07:23:16,796 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2024-11-16 07:23:16,796 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 07:23:16,798 INFO L255 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 54 conjuncts are in the unsatisfiable core [2024-11-16 07:23:16,801 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 07:23:17,084 INFO L134 CoverageAnalysis]: Checked inductivity of 422 backedges. 30 proven. 202 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2024-11-16 07:23:17,084 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 07:23:23,444 WARN L286 SmtUtils]: Spent 5.98s on a formula simplification that was a NOOP. DAG size: 14 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-16 07:23:27,477 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse0 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|))) (or (= (+ (* |c_ULTIMATE.start_main_~c~0#1| 6) (* |c_ULTIMATE.start_main_~c~0#1| |c_ULTIMATE.start_main_~y~0#1|)) (+ .cse0 (* |c_ULTIMATE.start_main_~y~0#1| 6))) (not (= 0 (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 10) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 7) .cse0 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 6)) 12))))) is different from false [2024-11-16 07:23:35,665 WARN L286 SmtUtils]: Spent 8.14s on a formula simplification that was a NOOP. DAG size: 4 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-16 07:23:47,684 WARN L286 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 4 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-16 07:24:03,705 WARN L286 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 10 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-16 07:24:07,934 WARN L873 $PredicateComparison]: unable to prove that (or (forall ((|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_44| Int) (|v_ULTIMATE.start_main_~c~0#1_BEFORE_CALL_31| Int)) (let ((.cse0 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_44| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_44|))) (or (= 0 (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_44| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_44| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_44| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_44| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_44| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_44| 10) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_44| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_44| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_44| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_44| 7) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_44| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_44| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_44| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_44| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_44| 6) .cse0) 12)) (= (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_44| |v_ULTIMATE.start_main_~c~0#1_BEFORE_CALL_31|) (* |v_ULTIMATE.start_main_~c~0#1_BEFORE_CALL_31| 6)) (+ .cse0 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_44| 6)))))) (not (= |c___VERIFIER_assert_#in~cond| 0))) is different from true [2024-11-16 07:24:24,942 WARN L286 SmtUtils]: Spent 8.00s on a formula simplification that was a NOOP. DAG size: 10 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-16 07:24:41,012 WARN L286 SmtUtils]: Spent 8.03s on a formula simplification that was a NOOP. DAG size: 10 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-16 07:24:45,020 WARN L873 $PredicateComparison]: unable to prove that (or (forall ((|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_44| Int) (|v_ULTIMATE.start_main_~c~0#1_BEFORE_CALL_31| Int)) (let ((.cse0 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_44| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_44|))) (or (= 0 (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_44| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_44| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_44| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_44| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_44| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_44| 10) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_44| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_44| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_44| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_44| 7) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_44| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_44| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_44| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_44| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_44| 6) .cse0) 12)) (= (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_44| |v_ULTIMATE.start_main_~c~0#1_BEFORE_CALL_31|) (* |v_ULTIMATE.start_main_~c~0#1_BEFORE_CALL_31| 6)) (+ .cse0 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_44| 6)))))) (not (= |c___VERIFIER_assert_#in~cond| 0)) (= c___VERIFIER_assert_~cond 0)) is different from true