./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive-simple/fibo_25-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3061b6dc Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursive-simple/fibo_25-2.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 9030972e60093099261ffd255cd123d40a9b99982e16d5d1c2c77af1369268fd --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-3061b6d-m [2024-11-18 14:24:00,053 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-18 14:24:00,149 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-18 14:24:00,155 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-18 14:24:00,155 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-18 14:24:00,181 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-18 14:24:00,182 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-18 14:24:00,182 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-18 14:24:00,183 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-18 14:24:00,183 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-18 14:24:00,183 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-18 14:24:00,184 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-18 14:24:00,184 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-18 14:24:00,185 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-18 14:24:00,185 INFO L153 SettingsManager]: * Use SBE=true [2024-11-18 14:24:00,185 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-18 14:24:00,186 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-18 14:24:00,186 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-18 14:24:00,186 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-18 14:24:00,187 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-18 14:24:00,187 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-18 14:24:00,188 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-18 14:24:00,188 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-18 14:24:00,188 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-18 14:24:00,189 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-18 14:24:00,189 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-18 14:24:00,189 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-18 14:24:00,190 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-18 14:24:00,190 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-18 14:24:00,190 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-18 14:24:00,190 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-18 14:24:00,191 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-18 14:24:00,191 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-18 14:24:00,191 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-18 14:24:00,192 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-18 14:24:00,192 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-18 14:24:00,192 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-18 14:24:00,193 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-18 14:24:00,193 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-18 14:24:00,193 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-18 14:24:00,193 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-18 14:24:00,197 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-18 14:24:00,197 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9030972e60093099261ffd255cd123d40a9b99982e16d5d1c2c77af1369268fd [2024-11-18 14:24:00,432 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-18 14:24:00,461 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-18 14:24:00,463 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-18 14:24:00,464 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-18 14:24:00,465 INFO L274 PluginConnector]: CDTParser initialized [2024-11-18 14:24:00,466 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/fibo_25-2.c [2024-11-18 14:24:01,964 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-18 14:24:02,141 INFO L384 CDTParser]: Found 1 translation units. [2024-11-18 14:24:02,142 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/fibo_25-2.c [2024-11-18 14:24:02,149 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/69450d627/25e306710c4a4bbca92d11d6344a440f/FLAG9f3590ff9 [2024-11-18 14:24:02,539 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/69450d627/25e306710c4a4bbca92d11d6344a440f [2024-11-18 14:24:02,541 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-18 14:24:02,542 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-18 14:24:02,543 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-18 14:24:02,543 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-18 14:24:02,548 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-18 14:24:02,549 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 02:24:02" (1/1) ... [2024-11-18 14:24:02,550 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e7fc86f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:24:02, skipping insertion in model container [2024-11-18 14:24:02,550 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 02:24:02" (1/1) ... [2024-11-18 14:24:02,571 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-18 14:24:02,744 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/recursive-simple/fibo_25-2.c[746,759] [2024-11-18 14:24:02,756 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-18 14:24:02,769 INFO L200 MainTranslator]: Completed pre-run [2024-11-18 14:24:02,784 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/recursive-simple/fibo_25-2.c[746,759] [2024-11-18 14:24:02,785 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-18 14:24:02,821 INFO L204 MainTranslator]: Completed translation [2024-11-18 14:24:02,822 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:24:02 WrapperNode [2024-11-18 14:24:02,822 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-18 14:24:02,823 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-18 14:24:02,825 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-18 14:24:02,825 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-18 14:24:02,832 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:24:02" (1/1) ... [2024-11-18 14:24:02,840 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:24:02" (1/1) ... [2024-11-18 14:24:02,864 INFO L138 Inliner]: procedures = 13, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 20 [2024-11-18 14:24:02,865 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-18 14:24:02,865 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-18 14:24:02,866 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-18 14:24:02,866 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-18 14:24:02,875 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:24:02" (1/1) ... [2024-11-18 14:24:02,875 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:24:02" (1/1) ... [2024-11-18 14:24:02,877 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:24:02" (1/1) ... [2024-11-18 14:24:02,891 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-11-18 14:24:02,894 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:24:02" (1/1) ... [2024-11-18 14:24:02,895 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:24:02" (1/1) ... [2024-11-18 14:24:02,897 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:24:02" (1/1) ... [2024-11-18 14:24:02,898 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:24:02" (1/1) ... [2024-11-18 14:24:02,900 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:24:02" (1/1) ... [2024-11-18 14:24:02,901 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:24:02" (1/1) ... [2024-11-18 14:24:02,902 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-18 14:24:02,904 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-18 14:24:02,904 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-18 14:24:02,904 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-18 14:24:02,905 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:24:02" (1/1) ... [2024-11-18 14:24:02,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-18 14:24:02,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:24:02,938 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-18 14:24:02,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-18 14:24:02,985 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-18 14:24:02,985 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-18 14:24:02,985 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-18 14:24:02,985 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-18 14:24:02,985 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2024-11-18 14:24:02,985 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2024-11-18 14:24:03,036 INFO L238 CfgBuilder]: Building ICFG [2024-11-18 14:24:03,039 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-18 14:24:03,124 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2024-11-18 14:24:03,124 INFO L287 CfgBuilder]: Performing block encoding [2024-11-18 14:24:03,139 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-18 14:24:03,140 INFO L316 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-18 14:24:03,140 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 02:24:03 BoogieIcfgContainer [2024-11-18 14:24:03,140 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-18 14:24:03,143 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-18 14:24:03,143 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-18 14:24:03,146 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-18 14:24:03,147 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 02:24:02" (1/3) ... [2024-11-18 14:24:03,147 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18a870da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 02:24:03, skipping insertion in model container [2024-11-18 14:24:03,147 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:24:02" (2/3) ... [2024-11-18 14:24:03,148 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18a870da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 02:24:03, skipping insertion in model container [2024-11-18 14:24:03,148 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 02:24:03" (3/3) ... [2024-11-18 14:24:03,150 INFO L112 eAbstractionObserver]: Analyzing ICFG fibo_25-2.c [2024-11-18 14:24:03,166 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-18 14:24:03,167 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-18 14:24:03,231 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-18 14:24:03,239 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;@72311f00, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-18 14:24:03,240 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-18 14:24:03,244 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 15 states have internal predecessors, (18), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-18 14:24:03,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-18 14:24:03,251 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:24:03,252 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:24:03,252 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:24:03,257 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:24:03,258 INFO L85 PathProgramCache]: Analyzing trace with hash -1755511548, now seen corresponding path program 1 times [2024-11-18 14:24:03,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:24:03,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782111582] [2024-11-18 14:24:03,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 14:24:03,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:24:03,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 14:24:03,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 14:24:03,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:24:03,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782111582] [2024-11-18 14:24:03,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782111582] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-18 14:24:03,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-18 14:24:03,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-18 14:24:03,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225909271] [2024-11-18 14:24:03,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 14:24:03,523 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-18 14:24:03,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:24:03,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-18 14:24:03,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-18 14:24:03,544 INFO L87 Difference]: Start difference. First operand has 20 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 15 states have internal predecessors, (18), 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 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-18 14:24:03,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:24:03,619 INFO L93 Difference]: Finished difference Result 32 states and 40 transitions. [2024-11-18 14:24:03,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-18 14:24:03,621 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2024-11-18 14:24:03,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:24:03,627 INFO L225 Difference]: With dead ends: 32 [2024-11-18 14:24:03,627 INFO L226 Difference]: Without dead ends: 20 [2024-11-18 14:24:03,630 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-18 14:24:03,632 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 10 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-18 14:24:03,635 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 51 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-18 14:24:03,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2024-11-18 14:24:03,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2024-11-18 14:24:03,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 13 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-18 14:24:03,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2024-11-18 14:24:03,671 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 10 [2024-11-18 14:24:03,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:24:03,672 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2024-11-18 14:24:03,672 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-18 14:24:03,672 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2024-11-18 14:24:03,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-18 14:24:03,674 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:24:03,674 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:24:03,674 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-18 14:24:03,674 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:24:03,675 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:24:03,675 INFO L85 PathProgramCache]: Analyzing trace with hash 2128459596, now seen corresponding path program 1 times [2024-11-18 14:24:03,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:24:03,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665570362] [2024-11-18 14:24:03,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 14:24:03,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:24:03,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 14:24:03,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 14:24:03,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:24:03,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665570362] [2024-11-18 14:24:03,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665570362] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-18 14:24:03,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-18 14:24:03,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-18 14:24:03,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260226641] [2024-11-18 14:24:03,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 14:24:03,741 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-18 14:24:03,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:24:03,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-18 14:24:03,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-18 14:24:03,743 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-18 14:24:03,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:24:03,803 INFO L93 Difference]: Finished difference Result 24 states and 29 transitions. [2024-11-18 14:24:03,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-18 14:24:03,804 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2024-11-18 14:24:03,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:24:03,805 INFO L225 Difference]: With dead ends: 24 [2024-11-18 14:24:03,805 INFO L226 Difference]: Without dead ends: 20 [2024-11-18 14:24:03,805 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-18 14:24:03,807 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 7 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-18 14:24:03,808 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 34 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-18 14:24:03,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2024-11-18 14:24:03,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2024-11-18 14:24:03,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 13 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-18 14:24:03,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2024-11-18 14:24:03,817 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 11 [2024-11-18 14:24:03,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:24:03,817 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2024-11-18 14:24:03,817 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-18 14:24:03,818 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2024-11-18 14:24:03,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-11-18 14:24:03,819 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:24:03,819 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:24:03,819 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-18 14:24:03,819 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:24:03,820 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:24:03,820 INFO L85 PathProgramCache]: Analyzing trace with hash -42544313, now seen corresponding path program 1 times [2024-11-18 14:24:03,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:24:03,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575152719] [2024-11-18 14:24:03,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 14:24:03,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:24:03,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 14:24:03,995 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-18 14:24:03,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:24:03,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575152719] [2024-11-18 14:24:03,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575152719] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 14:24:03,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293076492] [2024-11-18 14:24:03,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 14:24:03,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:24:03,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:24:03,999 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 14:24:04,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-18 14:24:04,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 14:24:04,086 INFO L255 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-18 14:24:04,094 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 14:24:04,193 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-18 14:24:04,194 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 14:24:04,452 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-18 14:24:04,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293076492] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 14:24:04,455 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 14:24:04,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 11 [2024-11-18 14:24:04,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598002394] [2024-11-18 14:24:04,456 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 14:24:04,456 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-18 14:24:04,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:24:04,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-18 14:24:04,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-11-18 14:24:04,460 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 11 states, 8 states have (on average 3.5) internal successors, (28), 11 states have internal predecessors, (28), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-18 14:24:04,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:24:04,568 INFO L93 Difference]: Finished difference Result 35 states and 46 transitions. [2024-11-18 14:24:04,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-18 14:24:04,569 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 8 states have (on average 3.5) internal successors, (28), 11 states have internal predecessors, (28), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 8 states have call successors, (8) Word has length 23 [2024-11-18 14:24:04,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:24:04,570 INFO L225 Difference]: With dead ends: 35 [2024-11-18 14:24:04,570 INFO L226 Difference]: Without dead ends: 20 [2024-11-18 14:24:04,571 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2024-11-18 14:24:04,572 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 9 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-18 14:24:04,573 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 60 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-18 14:24:04,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2024-11-18 14:24:04,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2024-11-18 14:24:04,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 15 states have internal predecessors, (15), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-18 14:24:04,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2024-11-18 14:24:04,582 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 23 [2024-11-18 14:24:04,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:24:04,583 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2024-11-18 14:24:04,583 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 8 states have (on average 3.5) internal successors, (28), 11 states have internal predecessors, (28), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-18 14:24:04,584 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2024-11-18 14:24:04,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-18 14:24:04,586 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:24:04,586 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:24:04,605 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-18 14:24:04,787 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 [2024-11-18 14:24:04,788 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:24:04,788 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:24:04,788 INFO L85 PathProgramCache]: Analyzing trace with hash 170813287, now seen corresponding path program 1 times [2024-11-18 14:24:04,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:24:04,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933255908] [2024-11-18 14:24:04,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 14:24:04,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:24:04,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 14:24:04,922 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-18 14:24:04,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:24:04,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933255908] [2024-11-18 14:24:04,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933255908] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 14:24:04,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42405182] [2024-11-18 14:24:04,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 14:24:04,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:24:04,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:24:04,930 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 14:24:04,932 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-18 14:24:04,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 14:24:04,966 INFO L255 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-18 14:24:04,967 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 14:24:05,003 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-18 14:24:05,003 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 14:24:05,157 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-18 14:24:05,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42405182] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 14:24:05,157 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 14:24:05,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 9 [2024-11-18 14:24:05,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694370288] [2024-11-18 14:24:05,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 14:24:05,158 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-18 14:24:05,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:24:05,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-18 14:24:05,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-11-18 14:24:05,159 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 9 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 9 states have internal predecessors, (23), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-18 14:24:05,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:24:05,218 INFO L93 Difference]: Finished difference Result 29 states and 38 transitions. [2024-11-18 14:24:05,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-18 14:24:05,219 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 9 states have internal predecessors, (23), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) Word has length 24 [2024-11-18 14:24:05,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:24:05,220 INFO L225 Difference]: With dead ends: 29 [2024-11-18 14:24:05,220 INFO L226 Difference]: Without dead ends: 25 [2024-11-18 14:24:05,220 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-11-18 14:24:05,221 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 21 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-18 14:24:05,222 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 37 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-18 14:24:05,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2024-11-18 14:24:05,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2024-11-18 14:24:05,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.125) internal successors, (18), 18 states have internal predecessors, (18), 4 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2024-11-18 14:24:05,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 34 transitions. [2024-11-18 14:24:05,231 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 34 transitions. Word has length 24 [2024-11-18 14:24:05,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:24:05,232 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 34 transitions. [2024-11-18 14:24:05,232 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 9 states have internal predecessors, (23), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-18 14:24:05,232 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 34 transitions. [2024-11-18 14:24:05,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-18 14:24:05,235 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:24:05,235 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:24:05,251 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-18 14:24:05,436 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 [2024-11-18 14:24:05,436 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:24:05,437 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:24:05,437 INFO L85 PathProgramCache]: Analyzing trace with hash -187634876, now seen corresponding path program 2 times [2024-11-18 14:24:05,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:24:05,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466628795] [2024-11-18 14:24:05,437 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-18 14:24:05,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:24:05,451 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-18 14:24:05,452 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:24:05,590 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 24 proven. 7 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-18 14:24:05,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:24:05,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466628795] [2024-11-18 14:24:05,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466628795] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 14:24:05,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873072987] [2024-11-18 14:24:05,591 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-18 14:24:05,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:24:05,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:24:05,592 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 14:24:05,594 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-18 14:24:05,640 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-18 14:24:05,641 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:24:05,641 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-18 14:24:05,643 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 14:24:05,731 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-18 14:24:05,731 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 14:24:06,071 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-18 14:24:06,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873072987] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 14:24:06,071 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 14:24:06,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 9] total 18 [2024-11-18 14:24:06,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156941030] [2024-11-18 14:24:06,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 14:24:06,072 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-18 14:24:06,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:24:06,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-18 14:24:06,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2024-11-18 14:24:06,073 INFO L87 Difference]: Start difference. First operand 25 states and 34 transitions. Second operand has 18 states, 16 states have (on average 2.8125) internal successors, (45), 18 states have internal predecessors, (45), 10 states have call successors, (12), 1 states have call predecessors, (12), 7 states have return successors, (13), 6 states have call predecessors, (13), 10 states have call successors, (13) [2024-11-18 14:24:06,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:24:06,277 INFO L93 Difference]: Finished difference Result 60 states and 93 transitions. [2024-11-18 14:24:06,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-18 14:24:06,278 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.8125) internal successors, (45), 18 states have internal predecessors, (45), 10 states have call successors, (12), 1 states have call predecessors, (12), 7 states have return successors, (13), 6 states have call predecessors, (13), 10 states have call successors, (13) Word has length 37 [2024-11-18 14:24:06,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:24:06,280 INFO L225 Difference]: With dead ends: 60 [2024-11-18 14:24:06,280 INFO L226 Difference]: Without dead ends: 38 [2024-11-18 14:24:06,281 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 65 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=168, Invalid=482, Unknown=0, NotChecked=0, Total=650 [2024-11-18 14:24:06,282 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 52 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-18 14:24:06,282 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 95 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-18 14:24:06,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2024-11-18 14:24:06,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2024-11-18 14:24:06,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 26 states have internal predecessors, (30), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (11), 7 states have call predecessors, (11), 5 states have call successors, (11) [2024-11-18 14:24:06,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2024-11-18 14:24:06,296 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 37 [2024-11-18 14:24:06,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:24:06,297 INFO L471 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2024-11-18 14:24:06,297 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.8125) internal successors, (45), 18 states have internal predecessors, (45), 10 states have call successors, (12), 1 states have call predecessors, (12), 7 states have return successors, (13), 6 states have call predecessors, (13), 10 states have call successors, (13) [2024-11-18 14:24:06,299 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2024-11-18 14:24:06,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2024-11-18 14:24:06,301 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:24:06,301 INFO L215 NwaCegarLoop]: trace histogram [13, 13, 11, 6, 6, 6, 6, 6, 6, 6, 5, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:24:06,320 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-18 14:24:06,501 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 [2024-11-18 14:24:06,502 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:24:06,502 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:24:06,502 INFO L85 PathProgramCache]: Analyzing trace with hash -721858190, now seen corresponding path program 3 times [2024-11-18 14:24:06,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:24:06,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578116570] [2024-11-18 14:24:06,502 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-18 14:24:06,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:24:06,527 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-11-18 14:24:06,527 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:24:06,675 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 174 proven. 17 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked. [2024-11-18 14:24:06,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:24:06,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578116570] [2024-11-18 14:24:06,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578116570] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 14:24:06,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125541968] [2024-11-18 14:24:06,675 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-18 14:24:06,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:24:06,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:24:06,680 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 14:24:06,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-18 14:24:06,742 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-11-18 14:24:06,742 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:24:06,743 INFO L255 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-18 14:24:06,745 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 14:24:06,783 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 174 proven. 17 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked. [2024-11-18 14:24:06,786 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 14:24:07,155 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 174 proven. 18 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2024-11-18 14:24:07,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125541968] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 14:24:07,156 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 14:24:07,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9] total 11 [2024-11-18 14:24:07,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844016233] [2024-11-18 14:24:07,156 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 14:24:07,157 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-18 14:24:07,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:24:07,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-18 14:24:07,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-11-18 14:24:07,158 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 4 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (10), 6 states have call predecessors, (10), 4 states have call successors, (10) [2024-11-18 14:24:07,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:24:07,255 INFO L93 Difference]: Finished difference Result 72 states and 93 transitions. [2024-11-18 14:24:07,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-18 14:24:07,256 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 4 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (10), 6 states have call predecessors, (10), 4 states have call successors, (10) Word has length 93 [2024-11-18 14:24:07,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:24:07,258 INFO L225 Difference]: With dead ends: 72 [2024-11-18 14:24:07,258 INFO L226 Difference]: Without dead ends: 40 [2024-11-18 14:24:07,258 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 180 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2024-11-18 14:24:07,259 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 17 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-18 14:24:07,259 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 84 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-18 14:24:07,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2024-11-18 14:24:07,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2024-11-18 14:24:07,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 29 states have (on average 1.103448275862069) internal successors, (32), 27 states have internal predecessors, (32), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (10), 7 states have call predecessors, (10), 5 states have call successors, (10) [2024-11-18 14:24:07,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 47 transitions. [2024-11-18 14:24:07,266 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 47 transitions. Word has length 93 [2024-11-18 14:24:07,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:24:07,267 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 47 transitions. [2024-11-18 14:24:07,267 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 4 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (10), 6 states have call predecessors, (10), 4 states have call successors, (10) [2024-11-18 14:24:07,267 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 47 transitions. [2024-11-18 14:24:07,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2024-11-18 14:24:07,268 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:24:07,268 INFO L215 NwaCegarLoop]: trace histogram [11, 11, 9, 5, 5, 5, 5, 5, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:24:07,281 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-18 14:24:07,470 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 [2024-11-18 14:24:07,470 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:24:07,471 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:24:07,471 INFO L85 PathProgramCache]: Analyzing trace with hash 366248375, now seen corresponding path program 4 times [2024-11-18 14:24:07,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:24:07,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285151905] [2024-11-18 14:24:07,471 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-18 14:24:07,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:24:07,493 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-18 14:24:07,494 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:24:07,732 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 72 proven. 121 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2024-11-18 14:24:07,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:24:07,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285151905] [2024-11-18 14:24:07,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285151905] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 14:24:07,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611386815] [2024-11-18 14:24:07,733 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-18 14:24:07,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:24:07,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:24:07,735 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 14:24:07,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-18 14:24:07,791 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-18 14:24:07,791 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:24:07,792 INFO L255 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-18 14:24:07,795 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 14:24:07,874 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 82 proven. 122 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2024-11-18 14:24:07,875 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 14:24:08,613 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 82 proven. 134 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2024-11-18 14:24:08,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611386815] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 14:24:08,613 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 14:24:08,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 15] total 20 [2024-11-18 14:24:08,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944651066] [2024-11-18 14:24:08,614 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 14:24:08,614 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-18 14:24:08,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:24:08,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-18 14:24:08,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2024-11-18 14:24:08,616 INFO L87 Difference]: Start difference. First operand 40 states and 47 transitions. Second operand has 20 states, 20 states have (on average 2.9) internal successors, (58), 20 states have internal predecessors, (58), 13 states have call successors, (15), 1 states have call predecessors, (15), 8 states have return successors, (17), 7 states have call predecessors, (17), 13 states have call successors, (17) [2024-11-18 14:24:08,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:24:08,917 INFO L93 Difference]: Finished difference Result 86 states and 114 transitions. [2024-11-18 14:24:08,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-18 14:24:08,918 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.9) internal successors, (58), 20 states have internal predecessors, (58), 13 states have call successors, (15), 1 states have call predecessors, (15), 8 states have return successors, (17), 7 states have call predecessors, (17), 13 states have call successors, (17) Word has length 79 [2024-11-18 14:24:08,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:24:08,920 INFO L225 Difference]: With dead ends: 86 [2024-11-18 14:24:08,920 INFO L226 Difference]: Without dead ends: 52 [2024-11-18 14:24:08,922 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 150 SyntacticMatches, 7 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=281, Invalid=711, Unknown=0, NotChecked=0, Total=992 [2024-11-18 14:24:08,923 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 53 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-18 14:24:08,925 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 98 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-18 14:24:08,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2024-11-18 14:24:08,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 44. [2024-11-18 14:24:08,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 31 states have (on average 1.064516129032258) internal successors, (33), 30 states have internal predecessors, (33), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (12), 8 states have call predecessors, (12), 7 states have call successors, (12) [2024-11-18 14:24:08,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2024-11-18 14:24:08,942 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 79 [2024-11-18 14:24:08,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:24:08,943 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2024-11-18 14:24:08,943 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.9) internal successors, (58), 20 states have internal predecessors, (58), 13 states have call successors, (15), 1 states have call predecessors, (15), 8 states have return successors, (17), 7 states have call predecessors, (17), 13 states have call successors, (17) [2024-11-18 14:24:08,943 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2024-11-18 14:24:08,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-11-18 14:24:08,944 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:24:08,944 INFO L215 NwaCegarLoop]: trace histogram [9, 9, 7, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:24:08,965 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-18 14:24:09,144 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 [2024-11-18 14:24:09,145 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:24:09,146 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:24:09,146 INFO L85 PathProgramCache]: Analyzing trace with hash -2015531204, now seen corresponding path program 5 times [2024-11-18 14:24:09,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:24:09,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494759432] [2024-11-18 14:24:09,146 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-18 14:24:09,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:24:09,169 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2024-11-18 14:24:09,173 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:24:09,291 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 39 proven. 57 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2024-11-18 14:24:09,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:24:09,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494759432] [2024-11-18 14:24:09,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494759432] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 14:24:09,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001275770] [2024-11-18 14:24:09,292 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-18 14:24:09,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:24:09,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:24:09,293 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 14:24:09,295 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-18 14:24:09,354 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2024-11-18 14:24:09,354 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:24:09,355 INFO L255 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-18 14:24:09,357 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 14:24:09,388 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 36 proven. 55 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2024-11-18 14:24:09,388 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 14:24:09,695 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2024-11-18 14:24:09,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2001275770] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 14:24:09,695 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 14:24:09,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 9] total 12 [2024-11-18 14:24:09,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668563740] [2024-11-18 14:24:09,696 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 14:24:09,696 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-18 14:24:09,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:24:09,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-18 14:24:09,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2024-11-18 14:24:09,697 INFO L87 Difference]: Start difference. First operand 44 states and 52 transitions. Second operand has 12 states, 10 states have (on average 3.9) internal successors, (39), 12 states have internal predecessors, (39), 8 states have call successors, (12), 1 states have call predecessors, (12), 4 states have return successors, (13), 7 states have call predecessors, (13), 8 states have call successors, (13) [2024-11-18 14:24:09,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:24:09,782 INFO L93 Difference]: Finished difference Result 51 states and 60 transitions. [2024-11-18 14:24:09,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-18 14:24:09,783 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 3.9) internal successors, (39), 12 states have internal predecessors, (39), 8 states have call successors, (12), 1 states have call predecessors, (12), 4 states have return successors, (13), 7 states have call predecessors, (13), 8 states have call successors, (13) Word has length 65 [2024-11-18 14:24:09,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:24:09,784 INFO L225 Difference]: With dead ends: 51 [2024-11-18 14:24:09,785 INFO L226 Difference]: Without dead ends: 47 [2024-11-18 14:24:09,785 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 124 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2024-11-18 14:24:09,786 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 17 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-18 14:24:09,786 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 69 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-18 14:24:09,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-11-18 14:24:09,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2024-11-18 14:24:09,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 32 states have internal predecessors, (35), 7 states have call successors, (7), 5 states have call predecessors, (7), 6 states have return successors, (14), 9 states have call predecessors, (14), 7 states have call successors, (14) [2024-11-18 14:24:09,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 56 transitions. [2024-11-18 14:24:09,793 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 56 transitions. Word has length 65 [2024-11-18 14:24:09,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:24:09,794 INFO L471 AbstractCegarLoop]: Abstraction has 47 states and 56 transitions. [2024-11-18 14:24:09,794 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 3.9) internal successors, (39), 12 states have internal predecessors, (39), 8 states have call successors, (12), 1 states have call predecessors, (12), 4 states have return successors, (13), 7 states have call predecessors, (13), 8 states have call successors, (13) [2024-11-18 14:24:09,794 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 56 transitions. [2024-11-18 14:24:09,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2024-11-18 14:24:09,795 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:24:09,796 INFO L215 NwaCegarLoop]: trace histogram [15, 15, 12, 7, 7, 7, 7, 7, 7, 7, 5, 3, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:24:09,812 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-18 14:24:09,999 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 [2024-11-18 14:24:10,000 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:24:10,001 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:24:10,001 INFO L85 PathProgramCache]: Analyzing trace with hash -292645265, now seen corresponding path program 6 times [2024-11-18 14:24:10,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:24:10,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313938203] [2024-11-18 14:24:10,001 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-18 14:24:10,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:24:10,026 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2024-11-18 14:24:10,027 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:24:10,200 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 45 proven. 223 refuted. 0 times theorem prover too weak. 302 trivial. 0 not checked. [2024-11-18 14:24:10,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:24:10,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313938203] [2024-11-18 14:24:10,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313938203] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 14:24:10,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458276700] [2024-11-18 14:24:10,201 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-18 14:24:10,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:24:10,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:24:10,203 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 14:24:10,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-18 14:24:10,276 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2024-11-18 14:24:10,276 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:24:10,277 INFO L255 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-18 14:24:10,280 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 14:24:10,341 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 42 proven. 229 refuted. 0 times theorem prover too weak. 299 trivial. 0 not checked. [2024-11-18 14:24:10,341 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 14:24:11,138 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 42 proven. 255 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2024-11-18 14:24:11,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458276700] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 14:24:11,139 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 14:24:11,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 13] total 16 [2024-11-18 14:24:11,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5946877] [2024-11-18 14:24:11,139 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 14:24:11,140 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-18 14:24:11,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:24:11,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-18 14:24:11,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2024-11-18 14:24:11,141 INFO L87 Difference]: Start difference. First operand 47 states and 56 transitions. Second operand has 16 states, 14 states have (on average 3.5) internal successors, (49), 16 states have internal predecessors, (49), 12 states have call successors, (14), 1 states have call predecessors, (14), 7 states have return successors, (18), 7 states have call predecessors, (18), 12 states have call successors, (18) [2024-11-18 14:24:11,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:24:11,272 INFO L93 Difference]: Finished difference Result 59 states and 77 transitions. [2024-11-18 14:24:11,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-18 14:24:11,273 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 3.5) internal successors, (49), 16 states have internal predecessors, (49), 12 states have call successors, (14), 1 states have call predecessors, (14), 7 states have return successors, (18), 7 states have call predecessors, (18), 12 states have call successors, (18) Word has length 106 [2024-11-18 14:24:11,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:24:11,274 INFO L225 Difference]: With dead ends: 59 [2024-11-18 14:24:11,274 INFO L226 Difference]: Without dead ends: 55 [2024-11-18 14:24:11,275 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 204 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2024-11-18 14:24:11,275 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 29 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-18 14:24:11,276 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 81 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-18 14:24:11,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2024-11-18 14:24:11,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 52. [2024-11-18 14:24:11,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 36 states have (on average 1.0555555555555556) internal successors, (38), 35 states have internal predecessors, (38), 8 states have call successors, (8), 5 states have call predecessors, (8), 7 states have return successors, (21), 11 states have call predecessors, (21), 8 states have call successors, (21) [2024-11-18 14:24:11,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 67 transitions. [2024-11-18 14:24:11,293 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 67 transitions. Word has length 106 [2024-11-18 14:24:11,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:24:11,293 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 67 transitions. [2024-11-18 14:24:11,294 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 3.5) internal successors, (49), 16 states have internal predecessors, (49), 12 states have call successors, (14), 1 states have call predecessors, (14), 7 states have return successors, (18), 7 states have call predecessors, (18), 12 states have call successors, (18) [2024-11-18 14:24:11,294 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 67 transitions. [2024-11-18 14:24:11,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2024-11-18 14:24:11,296 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:24:11,296 INFO L215 NwaCegarLoop]: trace histogram [29, 29, 23, 14, 14, 14, 14, 14, 14, 14, 9, 6, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:24:11,312 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-18 14:24:11,500 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:24:11,500 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:24:11,501 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:24:11,501 INFO L85 PathProgramCache]: Analyzing trace with hash -943421620, now seen corresponding path program 7 times [2024-11-18 14:24:11,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:24:11,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839906447] [2024-11-18 14:24:11,501 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-18 14:24:11,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:24:11,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 14:24:11,774 INFO L134 CoverageAnalysis]: Checked inductivity of 2241 backedges. 103 proven. 653 refuted. 0 times theorem prover too weak. 1485 trivial. 0 not checked. [2024-11-18 14:24:11,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:24:11,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839906447] [2024-11-18 14:24:11,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839906447] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 14:24:11,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267701174] [2024-11-18 14:24:11,775 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-18 14:24:11,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:24:11,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:24:11,777 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 14:24:11,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-18 14:24:11,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 14:24:11,886 INFO L255 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-18 14:24:11,890 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 14:24:11,964 INFO L134 CoverageAnalysis]: Checked inductivity of 2241 backedges. 103 proven. 653 refuted. 0 times theorem prover too weak. 1485 trivial. 0 not checked. [2024-11-18 14:24:11,964 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 14:24:13,370 INFO L134 CoverageAnalysis]: Checked inductivity of 2241 backedges. 103 proven. 693 refuted. 0 times theorem prover too weak. 1445 trivial. 0 not checked. [2024-11-18 14:24:13,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1267701174] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 14:24:13,371 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 14:24:13,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 15] total 17 [2024-11-18 14:24:13,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133151863] [2024-11-18 14:24:13,372 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 14:24:13,373 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-18 14:24:13,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:24:13,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-18 14:24:13,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2024-11-18 14:24:13,375 INFO L87 Difference]: Start difference. First operand 52 states and 67 transitions. Second operand has 17 states, 15 states have (on average 3.466666666666667) internal successors, (52), 17 states have internal predecessors, (52), 14 states have call successors, (15), 1 states have call predecessors, (15), 7 states have return successors, (19), 7 states have call predecessors, (19), 14 states have call successors, (19) [2024-11-18 14:24:13,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:24:13,537 INFO L93 Difference]: Finished difference Result 61 states and 84 transitions. [2024-11-18 14:24:13,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-18 14:24:13,538 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 3.466666666666667) internal successors, (52), 17 states have internal predecessors, (52), 14 states have call successors, (15), 1 states have call predecessors, (15), 7 states have return successors, (19), 7 states have call predecessors, (19), 14 states have call successors, (19) Word has length 201 [2024-11-18 14:24:13,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:24:13,540 INFO L225 Difference]: With dead ends: 61 [2024-11-18 14:24:13,540 INFO L226 Difference]: Without dead ends: 57 [2024-11-18 14:24:13,540 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 420 GetRequests, 394 SyntacticMatches, 6 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=144, Invalid=318, Unknown=0, NotChecked=0, Total=462 [2024-11-18 14:24:13,541 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 63 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-18 14:24:13,541 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 86 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-18 14:24:13,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-11-18 14:24:13,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2024-11-18 14:24:13,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 39 states have (on average 1.0512820512820513) internal successors, (41), 38 states have internal predecessors, (41), 9 states have call successors, (9), 5 states have call predecessors, (9), 8 states have return successors, (30), 13 states have call predecessors, (30), 9 states have call successors, (30) [2024-11-18 14:24:13,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 80 transitions. [2024-11-18 14:24:13,556 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 80 transitions. Word has length 201 [2024-11-18 14:24:13,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:24:13,557 INFO L471 AbstractCegarLoop]: Abstraction has 57 states and 80 transitions. [2024-11-18 14:24:13,557 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 3.466666666666667) internal successors, (52), 17 states have internal predecessors, (52), 14 states have call successors, (15), 1 states have call predecessors, (15), 7 states have return successors, (19), 7 states have call predecessors, (19), 14 states have call successors, (19) [2024-11-18 14:24:13,557 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 80 transitions. [2024-11-18 14:24:13,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2024-11-18 14:24:13,566 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:24:13,566 INFO L215 NwaCegarLoop]: trace histogram [47, 47, 38, 23, 23, 23, 23, 23, 23, 23, 15, 9, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:24:13,585 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-18 14:24:13,772 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-18 14:24:13,773 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:24:13,773 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:24:13,773 INFO L85 PathProgramCache]: Analyzing trace with hash 1104926743, now seen corresponding path program 8 times [2024-11-18 14:24:13,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:24:13,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965154215] [2024-11-18 14:24:13,774 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-18 14:24:13,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:24:13,831 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-18 14:24:13,832 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:24:14,222 INFO L134 CoverageAnalysis]: Checked inductivity of 6039 backedges. 225 proven. 1327 refuted. 0 times theorem prover too weak. 4487 trivial. 0 not checked. [2024-11-18 14:24:14,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:24:14,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965154215] [2024-11-18 14:24:14,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965154215] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 14:24:14,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94329280] [2024-11-18 14:24:14,223 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-18 14:24:14,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:24:14,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:24:14,225 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 14:24:14,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-18 14:24:14,385 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-18 14:24:14,386 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:24:14,388 INFO L255 TraceCheckSpWp]: Trace formula consists of 738 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-18 14:24:14,393 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 14:24:14,469 INFO L134 CoverageAnalysis]: Checked inductivity of 6039 backedges. 225 proven. 1327 refuted. 0 times theorem prover too weak. 4487 trivial. 0 not checked. [2024-11-18 14:24:14,470 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 14:24:16,407 INFO L134 CoverageAnalysis]: Checked inductivity of 6039 backedges. 225 proven. 1384 refuted. 0 times theorem prover too weak. 4430 trivial. 0 not checked. [2024-11-18 14:24:16,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94329280] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 14:24:16,408 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 14:24:16,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 17] total 19 [2024-11-18 14:24:16,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049104688] [2024-11-18 14:24:16,409 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 14:24:16,410 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-18 14:24:16,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:24:16,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-18 14:24:16,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2024-11-18 14:24:16,412 INFO L87 Difference]: Start difference. First operand 57 states and 80 transitions. Second operand has 19 states, 17 states have (on average 3.411764705882353) internal successors, (58), 19 states have internal predecessors, (58), 16 states have call successors, (17), 1 states have call predecessors, (17), 8 states have return successors, (22), 8 states have call predecessors, (22), 16 states have call successors, (22) [2024-11-18 14:24:16,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:24:16,620 INFO L93 Difference]: Finished difference Result 66 states and 99 transitions. [2024-11-18 14:24:16,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-18 14:24:16,620 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 3.411764705882353) internal successors, (58), 19 states have internal predecessors, (58), 16 states have call successors, (17), 1 states have call predecessors, (17), 8 states have return successors, (22), 8 states have call predecessors, (22), 16 states have call successors, (22) Word has length 324 [2024-11-18 14:24:16,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:24:16,623 INFO L225 Difference]: With dead ends: 66 [2024-11-18 14:24:16,623 INFO L226 Difference]: Without dead ends: 62 [2024-11-18 14:24:16,623 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 669 GetRequests, 639 SyntacticMatches, 7 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=188, Invalid=412, Unknown=0, NotChecked=0, Total=600 [2024-11-18 14:24:16,624 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 75 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-18 14:24:16,625 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 82 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-18 14:24:16,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2024-11-18 14:24:16,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2024-11-18 14:24:16,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 42 states have (on average 1.0476190476190477) internal successors, (44), 41 states have internal predecessors, (44), 10 states have call successors, (10), 5 states have call predecessors, (10), 9 states have return successors, (41), 15 states have call predecessors, (41), 10 states have call successors, (41) [2024-11-18 14:24:16,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 95 transitions. [2024-11-18 14:24:16,642 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 95 transitions. Word has length 324 [2024-11-18 14:24:16,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:24:16,643 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 95 transitions. [2024-11-18 14:24:16,643 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 3.411764705882353) internal successors, (58), 19 states have internal predecessors, (58), 16 states have call successors, (17), 1 states have call predecessors, (17), 8 states have return successors, (22), 8 states have call predecessors, (22), 16 states have call successors, (22) [2024-11-18 14:24:16,643 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 95 transitions. [2024-11-18 14:24:16,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 502 [2024-11-18 14:24:16,652 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:24:16,652 INFO L215 NwaCegarLoop]: trace histogram [73, 73, 59, 36, 36, 36, 36, 36, 36, 36, 23, 14, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:24:16,670 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-18 14:24:16,853 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:24:16,853 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:24:16,853 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:24:16,853 INFO L85 PathProgramCache]: Analyzing trace with hash 269277482, now seen corresponding path program 9 times [2024-11-18 14:24:16,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:24:16,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428760581] [2024-11-18 14:24:16,854 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-18 14:24:16,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:24:16,910 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2024-11-18 14:24:16,910 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:24:17,101 INFO L134 CoverageAnalysis]: Checked inductivity of 14743 backedges. 1517 proven. 265 refuted. 0 times theorem prover too weak. 12961 trivial. 0 not checked. [2024-11-18 14:24:17,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:24:17,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428760581] [2024-11-18 14:24:17,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428760581] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 14:24:17,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314236099] [2024-11-18 14:24:17,102 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-18 14:24:17,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:24:17,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:24:17,104 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 14:24:17,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-18 14:24:17,280 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2024-11-18 14:24:17,280 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:24:17,283 INFO L255 TraceCheckSpWp]: Trace formula consists of 468 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-18 14:24:17,289 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 14:24:17,359 INFO L134 CoverageAnalysis]: Checked inductivity of 14743 backedges. 1564 proven. 270 refuted. 0 times theorem prover too weak. 12909 trivial. 0 not checked. [2024-11-18 14:24:17,360 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 14:24:19,080 INFO L134 CoverageAnalysis]: Checked inductivity of 14743 backedges. 1570 proven. 296 refuted. 0 times theorem prover too weak. 12877 trivial. 0 not checked. [2024-11-18 14:24:19,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314236099] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 14:24:19,081 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 14:24:19,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 13] total 17 [2024-11-18 14:24:19,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134703304] [2024-11-18 14:24:19,081 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 14:24:19,084 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-18 14:24:19,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:24:19,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-18 14:24:19,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2024-11-18 14:24:19,086 INFO L87 Difference]: Start difference. First operand 62 states and 95 transitions. Second operand has 17 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 17 states have internal predecessors, (50), 9 states have call successors, (14), 1 states have call predecessors, (14), 7 states have return successors, (18), 10 states have call predecessors, (18), 9 states have call successors, (18) [2024-11-18 14:24:19,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:24:19,242 INFO L93 Difference]: Finished difference Result 165 states and 333 transitions. [2024-11-18 14:24:19,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-18 14:24:19,242 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 17 states have internal predecessors, (50), 9 states have call successors, (14), 1 states have call predecessors, (14), 7 states have return successors, (18), 10 states have call predecessors, (18), 9 states have call successors, (18) Word has length 501 [2024-11-18 14:24:19,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:24:19,245 INFO L225 Difference]: With dead ends: 165 [2024-11-18 14:24:19,245 INFO L226 Difference]: Without dead ends: 106 [2024-11-18 14:24:19,246 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1019 GetRequests, 993 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=168, Invalid=338, Unknown=0, NotChecked=0, Total=506 [2024-11-18 14:24:19,247 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 49 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-18 14:24:19,247 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 75 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-18 14:24:19,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2024-11-18 14:24:19,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 77. [2024-11-18 14:24:19,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 52 states have (on average 1.0769230769230769) internal successors, (56), 51 states have internal predecessors, (56), 14 states have call successors, (14), 7 states have call predecessors, (14), 10 states have return successors, (56), 18 states have call predecessors, (56), 14 states have call successors, (56) [2024-11-18 14:24:19,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 126 transitions. [2024-11-18 14:24:19,259 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 126 transitions. Word has length 501 [2024-11-18 14:24:19,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:24:19,260 INFO L471 AbstractCegarLoop]: Abstraction has 77 states and 126 transitions. [2024-11-18 14:24:19,260 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 17 states have internal predecessors, (50), 9 states have call successors, (14), 1 states have call predecessors, (14), 7 states have return successors, (18), 10 states have call predecessors, (18), 9 states have call successors, (18) [2024-11-18 14:24:19,260 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 126 transitions. [2024-11-18 14:24:19,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 570 [2024-11-18 14:24:19,269 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:24:19,270 INFO L215 NwaCegarLoop]: trace histogram [83, 83, 67, 41, 41, 41, 41, 41, 41, 41, 26, 16, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:24:19,287 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-18 14:24:19,473 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-18 14:24:19,474 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:24:19,474 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:24:19,474 INFO L85 PathProgramCache]: Analyzing trace with hash -1550468663, now seen corresponding path program 10 times [2024-11-18 14:24:19,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:24:19,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619844054] [2024-11-18 14:24:19,474 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-18 14:24:19,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:24:19,565 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-18 14:24:19,565 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:24:20,365 INFO L134 CoverageAnalysis]: Checked inductivity of 19103 backedges. 1662 proven. 3510 refuted. 0 times theorem prover too weak. 13931 trivial. 0 not checked. [2024-11-18 14:24:20,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:24:20,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619844054] [2024-11-18 14:24:20,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619844054] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 14:24:20,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619414900] [2024-11-18 14:24:20,366 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-18 14:24:20,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:24:20,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:24:20,368 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 14:24:20,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-18 14:24:20,593 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-18 14:24:20,593 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:24:20,597 INFO L255 TraceCheckSpWp]: Trace formula consists of 1010 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-18 14:24:20,605 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 14:24:20,741 INFO L134 CoverageAnalysis]: Checked inductivity of 19103 backedges. 1969 proven. 3803 refuted. 0 times theorem prover too weak. 13331 trivial. 0 not checked. [2024-11-18 14:24:20,742 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 14:24:24,929 INFO L134 CoverageAnalysis]: Checked inductivity of 19103 backedges. 1969 proven. 3911 refuted. 0 times theorem prover too weak. 13223 trivial. 0 not checked. [2024-11-18 14:24:24,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619414900] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 14:24:24,930 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 14:24:24,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 31] total 36 [2024-11-18 14:24:24,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219209618] [2024-11-18 14:24:24,930 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 14:24:24,931 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-11-18 14:24:24,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:24:24,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-11-18 14:24:24,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=1052, Unknown=0, NotChecked=0, Total=1260 [2024-11-18 14:24:24,934 INFO L87 Difference]: Start difference. First operand 77 states and 126 transitions. Second operand has 36 states, 36 states have (on average 3.0277777777777777) internal successors, (109), 36 states have internal predecessors, (109), 29 states have call successors, (33), 1 states have call predecessors, (33), 16 states have return successors, (45), 17 states have call predecessors, (45), 29 states have call successors, (45) [2024-11-18 14:24:25,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:24:25,614 INFO L93 Difference]: Finished difference Result 206 states and 448 transitions. [2024-11-18 14:24:25,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-11-18 14:24:25,614 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 3.0277777777777777) internal successors, (109), 36 states have internal predecessors, (109), 29 states have call successors, (33), 1 states have call predecessors, (33), 16 states have return successors, (45), 17 states have call predecessors, (45), 29 states have call successors, (45) Word has length 569 [2024-11-18 14:24:25,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:24:25,617 INFO L225 Difference]: With dead ends: 206 [2024-11-18 14:24:25,617 INFO L226 Difference]: Without dead ends: 135 [2024-11-18 14:24:25,619 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1196 GetRequests, 1116 SyntacticMatches, 15 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1126 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1076, Invalid=3346, Unknown=0, NotChecked=0, Total=4422 [2024-11-18 14:24:25,620 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 323 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 399 mSolverCounterSat, 298 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 298 IncrementalHoareTripleChecker+Valid, 399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-18 14:24:25,620 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [323 Valid, 194 Invalid, 697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [298 Valid, 399 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-18 14:24:25,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2024-11-18 14:24:25,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 110. [2024-11-18 14:24:25,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 78 states have (on average 1.0256410256410255) internal successors, (80), 76 states have internal predecessors, (80), 21 states have call successors, (21), 16 states have call predecessors, (21), 10 states have return successors, (56), 17 states have call predecessors, (56), 21 states have call successors, (56) [2024-11-18 14:24:25,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 157 transitions. [2024-11-18 14:24:25,641 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 157 transitions. Word has length 569 [2024-11-18 14:24:25,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:24:25,642 INFO L471 AbstractCegarLoop]: Abstraction has 110 states and 157 transitions. [2024-11-18 14:24:25,643 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 3.0277777777777777) internal successors, (109), 36 states have internal predecessors, (109), 29 states have call successors, (33), 1 states have call predecessors, (33), 16 states have return successors, (45), 17 states have call predecessors, (45), 29 states have call successors, (45) [2024-11-18 14:24:25,643 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 157 transitions. [2024-11-18 14:24:25,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1033 [2024-11-18 14:24:25,649 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:24:25,650 INFO L215 NwaCegarLoop]: trace histogram [151, 151, 122, 75, 75, 75, 75, 75, 75, 75, 47, 29, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:24:25,664 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-18 14:24:25,852 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-18 14:24:25,853 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:24:25,853 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:24:25,853 INFO L85 PathProgramCache]: Analyzing trace with hash 734454185, now seen corresponding path program 11 times [2024-11-18 14:24:25,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:24:25,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351522898] [2024-11-18 14:24:25,854 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-18 14:24:25,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:24:26,093 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 94 check-sat command(s) [2024-11-18 14:24:26,093 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:24:27,392 INFO L134 CoverageAnalysis]: Checked inductivity of 63781 backedges. 6639 proven. 3319 refuted. 0 times theorem prover too weak. 53823 trivial. 0 not checked. [2024-11-18 14:24:27,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:24:27,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351522898] [2024-11-18 14:24:27,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351522898] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 14:24:27,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239698984] [2024-11-18 14:24:27,393 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-18 14:24:27,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:24:27,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:24:27,395 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 14:24:27,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-18 14:24:27,977 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 94 check-sat command(s) [2024-11-18 14:24:27,977 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:24:27,984 INFO L255 TraceCheckSpWp]: Trace formula consists of 1641 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-18 14:24:27,998 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 14:24:28,136 INFO L134 CoverageAnalysis]: Checked inductivity of 63781 backedges. 24196 proven. 1865 refuted. 0 times theorem prover too weak. 37720 trivial. 0 not checked. [2024-11-18 14:24:28,137 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 14:24:33,697 INFO L134 CoverageAnalysis]: Checked inductivity of 63781 backedges. 6866 proven. 3648 refuted. 0 times theorem prover too weak. 53267 trivial. 0 not checked. [2024-11-18 14:24:33,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239698984] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 14:24:33,697 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 14:24:33,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 17, 27] total 35 [2024-11-18 14:24:33,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870101878] [2024-11-18 14:24:33,698 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 14:24:33,700 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-11-18 14:24:33,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:24:33,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-11-18 14:24:33,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=967, Unknown=0, NotChecked=0, Total=1190 [2024-11-18 14:24:33,702 INFO L87 Difference]: Start difference. First operand 110 states and 157 transitions. Second operand has 35 states, 34 states have (on average 3.2058823529411766) internal successors, (109), 35 states have internal predecessors, (109), 27 states have call successors, (34), 2 states have call predecessors, (34), 15 states have return successors, (45), 17 states have call predecessors, (45), 27 states have call successors, (45) [2024-11-18 14:24:34,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:24:34,153 INFO L93 Difference]: Finished difference Result 239 states and 364 transitions. [2024-11-18 14:24:34,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-11-18 14:24:34,154 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 3.2058823529411766) internal successors, (109), 35 states have internal predecessors, (109), 27 states have call successors, (34), 2 states have call predecessors, (34), 15 states have return successors, (45), 17 states have call predecessors, (45), 27 states have call successors, (45) Word has length 1032 [2024-11-18 14:24:34,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:24:34,157 INFO L225 Difference]: With dead ends: 239 [2024-11-18 14:24:34,158 INFO L226 Difference]: Without dead ends: 132 [2024-11-18 14:24:34,159 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2110 GetRequests, 2044 SyntacticMatches, 14 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 964 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=740, Invalid=2122, Unknown=0, NotChecked=0, Total=2862 [2024-11-18 14:24:34,160 INFO L432 NwaCegarLoop]: 45 mSDtfsCounter, 82 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-18 14:24:34,160 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 223 Invalid, 592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 491 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-18 14:24:34,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2024-11-18 14:24:34,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 99. [2024-11-18 14:24:34,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 69 states have (on average 1.0144927536231885) internal successors, (70), 68 states have internal predecessors, (70), 19 states have call successors, (19), 13 states have call predecessors, (19), 10 states have return successors, (52), 17 states have call predecessors, (52), 19 states have call successors, (52) [2024-11-18 14:24:34,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 141 transitions. [2024-11-18 14:24:34,176 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 141 transitions. Word has length 1032 [2024-11-18 14:24:34,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:24:34,178 INFO L471 AbstractCegarLoop]: Abstraction has 99 states and 141 transitions. [2024-11-18 14:24:34,178 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 3.2058823529411766) internal successors, (109), 35 states have internal predecessors, (109), 27 states have call successors, (34), 2 states have call predecessors, (34), 15 states have return successors, (45), 17 states have call predecessors, (45), 27 states have call successors, (45) [2024-11-18 14:24:34,178 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 141 transitions. [2024-11-18 14:24:34,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 924 [2024-11-18 14:24:34,190 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:24:34,190 INFO L215 NwaCegarLoop]: trace histogram [135, 135, 109, 67, 67, 67, 67, 67, 67, 67, 42, 26, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:24:34,209 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-18 14:24:34,390 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-18 14:24:34,391 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:24:34,391 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:24:34,391 INFO L85 PathProgramCache]: Analyzing trace with hash -586878367, now seen corresponding path program 12 times [2024-11-18 14:24:34,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:24:34,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159141609] [2024-11-18 14:24:34,391 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-18 14:24:34,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:24:34,468 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2024-11-18 14:24:34,468 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:24:34,710 INFO L134 CoverageAnalysis]: Checked inductivity of 50910 backedges. 1363 proven. 4292 refuted. 0 times theorem prover too weak. 45255 trivial. 0 not checked. [2024-11-18 14:24:34,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:24:34,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159141609] [2024-11-18 14:24:34,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159141609] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 14:24:34,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897629220] [2024-11-18 14:24:34,710 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-18 14:24:34,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:24:34,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:24:34,712 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 14:24:34,713 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-18 14:24:35,042 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2024-11-18 14:24:35,043 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:24:35,047 INFO L255 TraceCheckSpWp]: Trace formula consists of 557 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-18 14:24:35,056 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 14:24:35,155 INFO L134 CoverageAnalysis]: Checked inductivity of 50910 backedges. 1363 proven. 4292 refuted. 0 times theorem prover too weak. 45255 trivial. 0 not checked. [2024-11-18 14:24:35,155 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 14:24:38,717 INFO L134 CoverageAnalysis]: Checked inductivity of 50910 backedges. 1371 proven. 4361 refuted. 0 times theorem prover too weak. 45178 trivial. 0 not checked. [2024-11-18 14:24:38,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897629220] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 14:24:38,718 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 14:24:38,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 19] total 21 [2024-11-18 14:24:38,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886877565] [2024-11-18 14:24:38,718 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 14:24:38,719 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-18 14:24:38,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:24:38,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-18 14:24:38,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2024-11-18 14:24:38,721 INFO L87 Difference]: Start difference. First operand 99 states and 141 transitions. Second operand has 21 states, 19 states have (on average 3.4210526315789473) internal successors, (65), 21 states have internal predecessors, (65), 17 states have call successors, (20), 1 states have call predecessors, (20), 9 states have return successors, (26), 11 states have call predecessors, (26), 17 states have call successors, (26) [2024-11-18 14:24:38,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:24:38,862 INFO L93 Difference]: Finished difference Result 111 states and 169 transitions. [2024-11-18 14:24:38,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-18 14:24:38,863 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 3.4210526315789473) internal successors, (65), 21 states have internal predecessors, (65), 17 states have call successors, (20), 1 states have call predecessors, (20), 9 states have return successors, (26), 11 states have call predecessors, (26), 17 states have call successors, (26) Word has length 923 [2024-11-18 14:24:38,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:24:38,866 INFO L225 Difference]: With dead ends: 111 [2024-11-18 14:24:38,866 INFO L226 Difference]: Without dead ends: 107 [2024-11-18 14:24:38,868 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1870 GetRequests, 1836 SyntacticMatches, 8 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=238, Invalid=518, Unknown=0, NotChecked=0, Total=756 [2024-11-18 14:24:38,869 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 78 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-18 14:24:38,869 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 117 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-18 14:24:38,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2024-11-18 14:24:38,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 104. [2024-11-18 14:24:38,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 72 states have (on average 1.0138888888888888) internal successors, (73), 71 states have internal predecessors, (73), 20 states have call successors, (20), 13 states have call predecessors, (20), 11 states have return successors, (63), 19 states have call predecessors, (63), 20 states have call successors, (63) [2024-11-18 14:24:38,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 156 transitions. [2024-11-18 14:24:38,891 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 156 transitions. Word has length 923 [2024-11-18 14:24:38,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:24:38,892 INFO L471 AbstractCegarLoop]: Abstraction has 104 states and 156 transitions. [2024-11-18 14:24:38,892 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 3.4210526315789473) internal successors, (65), 21 states have internal predecessors, (65), 17 states have call successors, (20), 1 states have call predecessors, (20), 9 states have return successors, (26), 11 states have call predecessors, (26), 17 states have call successors, (26) [2024-11-18 14:24:38,892 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 156 transitions. [2024-11-18 14:24:38,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1278 [2024-11-18 14:24:38,902 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:24:38,903 INFO L215 NwaCegarLoop]: trace histogram [187, 187, 151, 93, 93, 93, 93, 93, 93, 93, 58, 36, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:24:38,921 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-18 14:24:39,107 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-18 14:24:39,108 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:24:39,108 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:24:39,108 INFO L85 PathProgramCache]: Analyzing trace with hash -1689267575, now seen corresponding path program 13 times [2024-11-18 14:24:39,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:24:39,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466052030] [2024-11-18 14:24:39,109 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-18 14:24:39,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:24:39,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 14:24:41,495 INFO L134 CoverageAnalysis]: Checked inductivity of 98001 backedges. 3051 proven. 10112 refuted. 0 times theorem prover too weak. 84838 trivial. 0 not checked. [2024-11-18 14:24:41,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:24:41,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466052030] [2024-11-18 14:24:41,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466052030] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 14:24:41,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458503434] [2024-11-18 14:24:41,495 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-18 14:24:41,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:24:41,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:24:41,497 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 14:24:41,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-18 14:24:42,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 14:24:42,044 INFO L255 TraceCheckSpWp]: Trace formula consists of 2854 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-18 14:24:42,058 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 14:24:42,242 INFO L134 CoverageAnalysis]: Checked inductivity of 98001 backedges. 1133 proven. 8809 refuted. 0 times theorem prover too weak. 88059 trivial. 0 not checked. [2024-11-18 14:24:42,243 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 14:24:48,444 INFO L134 CoverageAnalysis]: Checked inductivity of 98001 backedges. 1133 proven. 8935 refuted. 0 times theorem prover too weak. 87933 trivial. 0 not checked. [2024-11-18 14:24:48,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458503434] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 14:24:48,444 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 14:24:48,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 14, 23] total 37 [2024-11-18 14:24:48,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659426559] [2024-11-18 14:24:48,445 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 14:24:48,447 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-11-18 14:24:48,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:24:48,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-11-18 14:24:48,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=1114, Unknown=0, NotChecked=0, Total=1332 [2024-11-18 14:24:48,448 INFO L87 Difference]: Start difference. First operand 104 states and 156 transitions. Second operand has 37 states, 35 states have (on average 3.1142857142857143) internal successors, (109), 37 states have internal predecessors, (109), 32 states have call successors, (36), 1 states have call predecessors, (36), 19 states have return successors, (52), 21 states have call predecessors, (52), 32 states have call successors, (52) [2024-11-18 14:24:49,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:24:49,340 INFO L93 Difference]: Finished difference Result 291 states and 606 transitions. [2024-11-18 14:24:49,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2024-11-18 14:24:49,340 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 35 states have (on average 3.1142857142857143) internal successors, (109), 37 states have internal predecessors, (109), 32 states have call successors, (36), 1 states have call predecessors, (36), 19 states have return successors, (52), 21 states have call predecessors, (52), 32 states have call successors, (52) Word has length 1277 [2024-11-18 14:24:49,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:24:49,344 INFO L225 Difference]: With dead ends: 291 [2024-11-18 14:24:49,344 INFO L226 Difference]: Without dead ends: 190 [2024-11-18 14:24:49,347 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2622 GetRequests, 2536 SyntacticMatches, 10 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1625 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1330, Invalid=4676, Unknown=0, NotChecked=0, Total=6006 [2024-11-18 14:24:49,348 INFO L432 NwaCegarLoop]: 46 mSDtfsCounter, 194 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 706 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 884 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 706 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-18 14:24:49,348 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [195 Valid, 307 Invalid, 884 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 706 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-18 14:24:49,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2024-11-18 14:24:49,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 164. [2024-11-18 14:24:49,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 117 states have (on average 1.017094017094017) internal successors, (119), 115 states have internal predecessors, (119), 34 states have call successors, (34), 27 states have call predecessors, (34), 12 states have return successors, (105), 21 states have call predecessors, (105), 34 states have call successors, (105) [2024-11-18 14:24:49,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 258 transitions. [2024-11-18 14:24:49,369 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 258 transitions. Word has length 1277 [2024-11-18 14:24:49,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:24:49,369 INFO L471 AbstractCegarLoop]: Abstraction has 164 states and 258 transitions. [2024-11-18 14:24:49,370 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 35 states have (on average 3.1142857142857143) internal successors, (109), 37 states have internal predecessors, (109), 32 states have call successors, (36), 1 states have call predecessors, (36), 19 states have return successors, (52), 21 states have call predecessors, (52), 32 states have call successors, (52) [2024-11-18 14:24:49,370 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 258 transitions. [2024-11-18 14:24:49,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3566 [2024-11-18 14:24:49,428 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:24:49,429 INFO L215 NwaCegarLoop]: trace histogram [523, 523, 423, 261, 261, 261, 261, 261, 261, 261, 162, 100, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:24:49,450 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-18 14:24:49,629 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:24:49,630 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:24:49,630 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:24:49,631 INFO L85 PathProgramCache]: Analyzing trace with hash 522526173, now seen corresponding path program 14 times [2024-11-18 14:24:49,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:24:49,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678197751] [2024-11-18 14:24:49,631 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-18 14:24:49,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:24:50,683 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-18 14:24:50,683 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:24:56,089 INFO L134 CoverageAnalysis]: Checked inductivity of 770985 backedges. 2597 proven. 29116 refuted. 0 times theorem prover too weak. 739272 trivial. 0 not checked. [2024-11-18 14:24:56,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:24:56,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678197751] [2024-11-18 14:24:56,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678197751] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 14:24:56,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977409059] [2024-11-18 14:24:56,090 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-18 14:24:56,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:24:56,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:24:56,092 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 14:24:56,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-18 14:24:57,479 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-18 14:24:57,479 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:24:57,501 INFO L255 TraceCheckSpWp]: Trace formula consists of 7934 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-18 14:24:57,564 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 14:24:57,771 INFO L134 CoverageAnalysis]: Checked inductivity of 770985 backedges. 2597 proven. 29116 refuted. 0 times theorem prover too weak. 739272 trivial. 0 not checked. [2024-11-18 14:24:57,771 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 14:25:11,649 INFO L134 CoverageAnalysis]: Checked inductivity of 770985 backedges. 2597 proven. 29271 refuted. 0 times theorem prover too weak. 739117 trivial. 0 not checked. [2024-11-18 14:25:11,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977409059] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 14:25:11,650 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 14:25:11,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 25] total 27 [2024-11-18 14:25:11,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476120007] [2024-11-18 14:25:11,651 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 14:25:11,653 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-18 14:25:11,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:25:11,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-18 14:25:11,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=518, Unknown=0, NotChecked=0, Total=702 [2024-11-18 14:25:11,654 INFO L87 Difference]: Start difference. First operand 164 states and 258 transitions. Second operand has 27 states, 25 states have (on average 3.28) internal successors, (82), 27 states have internal predecessors, (82), 24 states have call successors, (25), 1 states have call predecessors, (25), 12 states have return successors, (34), 12 states have call predecessors, (34), 24 states have call successors, (34) [2024-11-18 14:25:11,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:25:11,860 INFO L93 Difference]: Finished difference Result 173 states and 284 transitions. [2024-11-18 14:25:11,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-18 14:25:11,861 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 3.28) internal successors, (82), 27 states have internal predecessors, (82), 24 states have call successors, (25), 1 states have call predecessors, (25), 12 states have return successors, (34), 12 states have call predecessors, (34), 24 states have call successors, (34) Word has length 3565 [2024-11-18 14:25:11,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:25:11,868 INFO L225 Difference]: With dead ends: 173 [2024-11-18 14:25:11,869 INFO L226 Difference]: Without dead ends: 169 [2024-11-18 14:25:11,869 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7163 GetRequests, 7117 SyntacticMatches, 11 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=424, Invalid=908, Unknown=0, NotChecked=0, Total=1332 [2024-11-18 14:25:11,870 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 69 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-18 14:25:11,870 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 121 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-18 14:25:11,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2024-11-18 14:25:11,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2024-11-18 14:25:11,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 120 states have (on average 1.0166666666666666) internal successors, (122), 118 states have internal predecessors, (122), 35 states have call successors, (35), 27 states have call predecessors, (35), 13 states have return successors, (118), 23 states have call predecessors, (118), 35 states have call successors, (118) [2024-11-18 14:25:11,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 275 transitions. [2024-11-18 14:25:11,888 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 275 transitions. Word has length 3565 [2024-11-18 14:25:11,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:25:11,889 INFO L471 AbstractCegarLoop]: Abstraction has 169 states and 275 transitions. [2024-11-18 14:25:11,890 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 3.28) internal successors, (82), 27 states have internal predecessors, (82), 24 states have call successors, (25), 1 states have call predecessors, (25), 12 states have return successors, (34), 12 states have call predecessors, (34), 24 states have call successors, (34) [2024-11-18 14:25:11,890 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 275 transitions. [2024-11-18 14:25:11,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3171 [2024-11-18 14:25:11,938 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:25:11,939 INFO L215 NwaCegarLoop]: trace histogram [465, 465, 376, 232, 232, 232, 232, 232, 232, 232, 144, 89, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:25:11,971 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-18 14:25:12,139 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-18 14:25:12,140 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:25:12,141 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:25:12,141 INFO L85 PathProgramCache]: Analyzing trace with hash 1169407108, now seen corresponding path program 15 times [2024-11-18 14:25:12,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:25:12,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312958359] [2024-11-18 14:25:12,142 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-18 14:25:12,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:25:12,306 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) [2024-11-18 14:25:12,307 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:25:12,860 INFO L134 CoverageAnalysis]: Checked inductivity of 609204 backedges. 3400 proven. 27297 refuted. 0 times theorem prover too weak. 578507 trivial. 0 not checked. [2024-11-18 14:25:12,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:25:12,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312958359] [2024-11-18 14:25:12,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312958359] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 14:25:12,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769662441] [2024-11-18 14:25:12,861 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-18 14:25:12,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:25:12,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:25:12,863 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 14:25:12,864 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-18 14:25:13,470 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) [2024-11-18 14:25:13,470 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:25:13,475 INFO L255 TraceCheckSpWp]: Trace formula consists of 907 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-18 14:25:13,511 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 14:25:13,680 INFO L134 CoverageAnalysis]: Checked inductivity of 609204 backedges. 3400 proven. 27297 refuted. 0 times theorem prover too weak. 578507 trivial. 0 not checked. [2024-11-18 14:25:13,681 INFO L311 TraceCheckSpWp]: Computing backward predicates...