./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound10.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c7c6ca5d Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound10.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 76fd23ddcb7e8fff12decb053b84ed59e907e32bdbc4e822256bdb820e1311ef --- Real Ultimate output --- This is Ultimate 0.2.5-?-c7c6ca5-m [2024-11-08 14:25:22,824 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-08 14:25:22,875 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-08 14:25:22,879 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-08 14:25:22,879 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-08 14:25:22,900 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-08 14:25:22,901 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-08 14:25:22,901 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-08 14:25:22,902 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-08 14:25:22,902 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-08 14:25:22,913 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-08 14:25:22,914 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-08 14:25:22,915 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-08 14:25:22,916 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-08 14:25:22,917 INFO L153 SettingsManager]: * Use SBE=true [2024-11-08 14:25:22,917 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-08 14:25:22,917 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-08 14:25:22,917 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-08 14:25:22,918 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-08 14:25:22,918 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-08 14:25:22,918 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-08 14:25:22,921 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-08 14:25:22,921 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-08 14:25:22,922 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-08 14:25:22,922 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-08 14:25:22,922 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-08 14:25:22,922 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-08 14:25:22,922 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-08 14:25:22,923 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-08 14:25:22,923 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-08 14:25:22,923 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-08 14:25:22,923 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-08 14:25:22,923 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 14:25:22,923 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-08 14:25:22,923 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-08 14:25:22,924 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-08 14:25:22,924 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-08 14:25:22,924 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-08 14:25:22,924 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-08 14:25:22,924 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-08 14:25:22,924 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-08 14:25:22,928 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-08 14:25:22,928 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 76fd23ddcb7e8fff12decb053b84ed59e907e32bdbc4e822256bdb820e1311ef [2024-11-08 14:25:23,125 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-08 14:25:23,143 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-08 14:25:23,145 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-08 14:25:23,146 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-08 14:25:23,146 INFO L274 PluginConnector]: CDTParser initialized [2024-11-08 14:25:23,147 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound10.c [2024-11-08 14:25:24,317 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-08 14:25:24,455 INFO L384 CDTParser]: Found 1 translation units. [2024-11-08 14:25:24,456 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound10.c [2024-11-08 14:25:24,461 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9dd3254be/770f83010d994172b2b4102b8b4dd6f8/FLAG74759df4e [2024-11-08 14:25:24,881 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9dd3254be/770f83010d994172b2b4102b8b4dd6f8 [2024-11-08 14:25:24,883 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-08 14:25:24,884 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-08 14:25:24,885 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-08 14:25:24,885 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-08 14:25:24,889 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-08 14:25:24,889 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 02:25:24" (1/1) ... [2024-11-08 14:25:24,890 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2aa9bdc8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:25:24, skipping insertion in model container [2024-11-08 14:25:24,890 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 02:25:24" (1/1) ... [2024-11-08 14:25:24,905 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-08 14:25:25,042 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound10.c[490,503] [2024-11-08 14:25:25,056 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 14:25:25,062 INFO L200 MainTranslator]: Completed pre-run [2024-11-08 14:25:25,070 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound10.c[490,503] [2024-11-08 14:25:25,086 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 14:25:25,097 INFO L204 MainTranslator]: Completed translation [2024-11-08 14:25:25,098 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:25:25 WrapperNode [2024-11-08 14:25:25,098 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-08 14:25:25,098 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-08 14:25:25,099 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-08 14:25:25,099 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-08 14:25:25,104 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:25:25" (1/1) ... [2024-11-08 14:25:25,114 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:25:25" (1/1) ... [2024-11-08 14:25:25,129 INFO L138 Inliner]: procedures = 14, calls = 14, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 94 [2024-11-08 14:25:25,130 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-08 14:25:25,130 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-08 14:25:25,130 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-08 14:25:25,130 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-08 14:25:25,138 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:25:25" (1/1) ... [2024-11-08 14:25:25,138 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:25:25" (1/1) ... [2024-11-08 14:25:25,139 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:25:25" (1/1) ... [2024-11-08 14:25:25,146 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]. [2024-11-08 14:25:25,150 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:25:25" (1/1) ... [2024-11-08 14:25:25,150 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:25:25" (1/1) ... [2024-11-08 14:25:25,152 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:25:25" (1/1) ... [2024-11-08 14:25:25,156 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:25:25" (1/1) ... [2024-11-08 14:25:25,157 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:25:25" (1/1) ... [2024-11-08 14:25:25,158 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:25:25" (1/1) ... [2024-11-08 14:25:25,161 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-08 14:25:25,163 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-08 14:25:25,163 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-08 14:25:25,163 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-08 14:25:25,164 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:25:25" (1/1) ... [2024-11-08 14:25:25,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 14:25:25,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 14:25:25,191 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) [2024-11-08 14:25:25,193 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 [2024-11-08 14:25:25,228 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-08 14:25:25,228 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-11-08 14:25:25,228 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-11-08 14:25:25,229 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-08 14:25:25,229 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-08 14:25:25,229 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-08 14:25:25,229 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-08 14:25:25,230 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-08 14:25:25,289 INFO L238 CfgBuilder]: Building ICFG [2024-11-08 14:25:25,291 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-08 14:25:25,426 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2024-11-08 14:25:25,427 INFO L287 CfgBuilder]: Performing block encoding [2024-11-08 14:25:25,438 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-08 14:25:25,438 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-08 14:25:25,439 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 02:25:25 BoogieIcfgContainer [2024-11-08 14:25:25,439 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-08 14:25:25,441 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-08 14:25:25,441 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-08 14:25:25,444 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-08 14:25:25,444 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.11 02:25:24" (1/3) ... [2024-11-08 14:25:25,445 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d5913f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 02:25:25, skipping insertion in model container [2024-11-08 14:25:25,445 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:25:25" (2/3) ... [2024-11-08 14:25:25,445 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d5913f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 02:25:25, skipping insertion in model container [2024-11-08 14:25:25,446 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 02:25:25" (3/3) ... [2024-11-08 14:25:25,447 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd3-ll_unwindbound10.c [2024-11-08 14:25:25,460 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-08 14:25:25,460 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-08 14:25:25,511 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-08 14:25:25,516 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;@6312968b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-08 14:25:25,517 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-08 14:25:25,519 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 24 states have (on average 1.5) internal successors, (36), 25 states have internal predecessors, (36), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-08 14:25:25,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-08 14:25:25,524 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:25:25,525 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 14:25:25,525 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:25:25,528 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:25:25,528 INFO L85 PathProgramCache]: Analyzing trace with hash 1663185933, now seen corresponding path program 1 times [2024-11-08 14:25:25,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 14:25:25,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693832428] [2024-11-08 14:25:25,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:25:25,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 14:25:25,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:25:25,631 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 14:25:25,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:25:25,641 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-08 14:25:25,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:25:25,648 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 14:25:25,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 14:25:25,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693832428] [2024-11-08 14:25:25,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693832428] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 14:25:25,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 14:25:25,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-08 14:25:25,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518202655] [2024-11-08 14:25:25,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 14:25:25,657 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-08 14:25:25,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 14:25:25,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-08 14:25:25,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-08 14:25:25,675 INFO L87 Difference]: Start difference. First operand has 35 states, 24 states have (on average 1.5) internal successors, (36), 25 states have internal predecessors, (36), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-08 14:25:25,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 14:25:25,691 INFO L93 Difference]: Finished difference Result 67 states and 103 transitions. [2024-11-08 14:25:25,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-08 14:25:25,692 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2024-11-08 14:25:25,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 14:25:25,697 INFO L225 Difference]: With dead ends: 67 [2024-11-08 14:25:25,697 INFO L226 Difference]: Without dead ends: 31 [2024-11-08 14:25:25,701 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-08 14:25:25,703 INFO L432 NwaCegarLoop]: 45 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-08 14:25:25,704 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-08 14:25:25,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-11-08 14:25:25,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2024-11-08 14:25:25,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 22 states have internal predecessors, (28), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-08 14:25:25,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 41 transitions. [2024-11-08 14:25:25,737 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 41 transitions. Word has length 18 [2024-11-08 14:25:25,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 14:25:25,737 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 41 transitions. [2024-11-08 14:25:25,738 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-08 14:25:25,738 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 41 transitions. [2024-11-08 14:25:25,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-08 14:25:25,739 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:25:25,739 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 14:25:25,739 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-08 14:25:25,739 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:25:25,740 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:25:25,740 INFO L85 PathProgramCache]: Analyzing trace with hash 1013747788, now seen corresponding path program 1 times [2024-11-08 14:25:25,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 14:25:25,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824678520] [2024-11-08 14:25:25,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:25:25,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 14:25:25,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:25:25,894 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 14:25:25,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:25:25,908 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-08 14:25:25,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:25:25,920 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 14:25:25,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 14:25:25,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824678520] [2024-11-08 14:25:25,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824678520] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 14:25:25,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 14:25:25,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-08 14:25:25,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816556535] [2024-11-08 14:25:25,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 14:25:25,924 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 14:25:25,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 14:25:25,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 14:25:25,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-08 14:25:25,925 INFO L87 Difference]: Start difference. First operand 31 states and 41 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-08 14:25:25,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 14:25:25,955 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2024-11-08 14:25:25,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 14:25:25,955 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2024-11-08 14:25:25,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 14:25:25,956 INFO L225 Difference]: With dead ends: 40 [2024-11-08 14:25:25,956 INFO L226 Difference]: Without dead ends: 33 [2024-11-08 14:25:25,956 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-08 14:25:25,957 INFO L432 NwaCegarLoop]: 39 mSDtfsCounter, 5 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-08 14:25:25,958 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 103 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-08 14:25:25,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-11-08 14:25:25,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2024-11-08 14:25:25,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 24 states have internal predecessors, (30), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-08 14:25:25,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2024-11-08 14:25:25,967 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 19 [2024-11-08 14:25:25,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 14:25:25,969 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2024-11-08 14:25:25,969 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-08 14:25:25,969 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2024-11-08 14:25:25,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-11-08 14:25:25,970 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:25:25,970 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 14:25:25,970 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-08 14:25:25,970 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:25:25,971 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:25:25,972 INFO L85 PathProgramCache]: Analyzing trace with hash 1341775226, now seen corresponding path program 1 times [2024-11-08 14:25:25,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 14:25:25,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220765222] [2024-11-08 14:25:25,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:25:25,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 14:25:26,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:25:26,115 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 14:25:26,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:25:26,124 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-08 14:25:26,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:25:26,163 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 14:25:26,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 14:25:26,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220765222] [2024-11-08 14:25:26,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220765222] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 14:25:26,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 14:25:26,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-08 14:25:26,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701486573] [2024-11-08 14:25:26,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 14:25:26,164 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-08 14:25:26,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 14:25:26,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-08 14:25:26,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-08 14:25:26,165 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-08 14:25:26,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 14:25:26,236 INFO L93 Difference]: Finished difference Result 53 states and 71 transitions. [2024-11-08 14:25:26,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-08 14:25:26,236 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2024-11-08 14:25:26,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 14:25:26,237 INFO L225 Difference]: With dead ends: 53 [2024-11-08 14:25:26,237 INFO L226 Difference]: Without dead ends: 46 [2024-11-08 14:25:26,238 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-08 14:25:26,239 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 42 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 14:25:26,239 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 119 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 14:25:26,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2024-11-08 14:25:26,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 34. [2024-11-08 14:25:26,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 25 states have internal predecessors, (31), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-08 14:25:26,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 44 transitions. [2024-11-08 14:25:26,246 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 44 transitions. Word has length 20 [2024-11-08 14:25:26,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 14:25:26,246 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 44 transitions. [2024-11-08 14:25:26,246 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-08 14:25:26,246 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 44 transitions. [2024-11-08 14:25:26,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-11-08 14:25:26,247 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:25:26,247 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 14:25:26,248 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-08 14:25:26,249 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:25:26,249 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:25:26,249 INFO L85 PathProgramCache]: Analyzing trace with hash -1315139464, now seen corresponding path program 1 times [2024-11-08 14:25:26,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 14:25:26,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121334435] [2024-11-08 14:25:26,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:25:26,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 14:25:26,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:25:26,336 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 14:25:26,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:25:26,345 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-08 14:25:26,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:25:26,352 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 14:25:26,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 14:25:26,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121334435] [2024-11-08 14:25:26,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121334435] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 14:25:26,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 14:25:26,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-08 14:25:26,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328268793] [2024-11-08 14:25:26,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 14:25:26,354 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 14:25:26,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 14:25:26,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 14:25:26,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-08 14:25:26,355 INFO L87 Difference]: Start difference. First operand 34 states and 44 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-08 14:25:26,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 14:25:26,377 INFO L93 Difference]: Finished difference Result 58 states and 78 transitions. [2024-11-08 14:25:26,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 14:25:26,378 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 25 [2024-11-08 14:25:26,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 14:25:26,379 INFO L225 Difference]: With dead ends: 58 [2024-11-08 14:25:26,379 INFO L226 Difference]: Without dead ends: 36 [2024-11-08 14:25:26,379 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-08 14:25:26,380 INFO L432 NwaCegarLoop]: 38 mSDtfsCounter, 8 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-08 14:25:26,382 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 103 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-08 14:25:26,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2024-11-08 14:25:26,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2024-11-08 14:25:26,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 27 states have internal predecessors, (33), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-08 14:25:26,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 46 transitions. [2024-11-08 14:25:26,391 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 46 transitions. Word has length 25 [2024-11-08 14:25:26,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 14:25:26,391 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 46 transitions. [2024-11-08 14:25:26,391 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-08 14:25:26,391 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 46 transitions. [2024-11-08 14:25:26,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-11-08 14:25:26,392 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:25:26,392 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 14:25:26,393 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-08 14:25:26,393 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:25:26,393 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:25:26,394 INFO L85 PathProgramCache]: Analyzing trace with hash 570907173, now seen corresponding path program 1 times [2024-11-08 14:25:26,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 14:25:26,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657814105] [2024-11-08 14:25:26,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:25:26,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 14:25:26,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-08 14:25:26,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [639521726] [2024-11-08 14:25:26,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:25:26,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:25:26,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 14:25:26,416 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) [2024-11-08 14:25:26,417 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-08 14:25:26,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:25:26,465 INFO L255 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-08 14:25:26,468 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 14:25:26,595 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 14:25:26,595 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-08 14:25:26,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 14:25:26,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657814105] [2024-11-08 14:25:26,596 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-08 14:25:26,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639521726] [2024-11-08 14:25:26,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639521726] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 14:25:26,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 14:25:26,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-08 14:25:26,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397811935] [2024-11-08 14:25:26,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 14:25:26,597 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 14:25:26,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 14:25:26,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 14:25:26,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-08 14:25:26,601 INFO L87 Difference]: Start difference. First operand 36 states and 46 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-08 14:25:26,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 14:25:26,644 INFO L93 Difference]: Finished difference Result 54 states and 71 transitions. [2024-11-08 14:25:26,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 14:25:26,645 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 25 [2024-11-08 14:25:26,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 14:25:26,646 INFO L225 Difference]: With dead ends: 54 [2024-11-08 14:25:26,646 INFO L226 Difference]: Without dead ends: 52 [2024-11-08 14:25:26,647 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-08 14:25:26,647 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 9 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-08 14:25:26,647 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 138 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-08 14:25:26,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2024-11-08 14:25:26,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2024-11-08 14:25:26,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 36 states have (on average 1.3055555555555556) internal successors, (47), 37 states have internal predecessors, (47), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-08 14:25:26,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 68 transitions. [2024-11-08 14:25:26,658 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 68 transitions. Word has length 25 [2024-11-08 14:25:26,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 14:25:26,658 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 68 transitions. [2024-11-08 14:25:26,658 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-08 14:25:26,658 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 68 transitions. [2024-11-08 14:25:26,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-08 14:25:26,659 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:25:26,659 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 14:25:26,671 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-08 14:25:26,863 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:25:26,864 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:25:26,864 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:25:26,864 INFO L85 PathProgramCache]: Analyzing trace with hash -1698298847, now seen corresponding path program 1 times [2024-11-08 14:25:26,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 14:25:26,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810818093] [2024-11-08 14:25:26,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:25:26,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 14:25:26,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:25:26,938 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 14:25:26,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:25:26,943 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-08 14:25:26,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:25:26,948 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 14:25:26,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 14:25:26,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810818093] [2024-11-08 14:25:26,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810818093] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 14:25:26,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576723538] [2024-11-08 14:25:26,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:25:26,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:25:26,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 14:25:26,953 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) [2024-11-08 14:25:26,954 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-08 14:25:27,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:25:27,001 INFO L255 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-08 14:25:27,002 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 14:25:27,028 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 14:25:27,029 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 14:25:27,078 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 14:25:27,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576723538] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 14:25:27,078 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 14:25:27,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 6] total 10 [2024-11-08 14:25:27,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455408908] [2024-11-08 14:25:27,079 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 14:25:27,079 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-08 14:25:27,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 14:25:27,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-08 14:25:27,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-11-08 14:25:27,080 INFO L87 Difference]: Start difference. First operand 51 states and 68 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-08 14:25:27,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 14:25:27,183 INFO L93 Difference]: Finished difference Result 147 states and 193 transitions. [2024-11-08 14:25:27,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-08 14:25:27,183 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 26 [2024-11-08 14:25:27,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 14:25:27,185 INFO L225 Difference]: With dead ends: 147 [2024-11-08 14:25:27,185 INFO L226 Difference]: Without dead ends: 140 [2024-11-08 14:25:27,185 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2024-11-08 14:25:27,186 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 95 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 14:25:27,186 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 171 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 14:25:27,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2024-11-08 14:25:27,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 97. [2024-11-08 14:25:27,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 69 states have (on average 1.3333333333333333) internal successors, (92), 71 states have internal predecessors, (92), 20 states have call successors, (20), 7 states have call predecessors, (20), 7 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2024-11-08 14:25:27,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 130 transitions. [2024-11-08 14:25:27,205 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 130 transitions. Word has length 26 [2024-11-08 14:25:27,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 14:25:27,205 INFO L471 AbstractCegarLoop]: Abstraction has 97 states and 130 transitions. [2024-11-08 14:25:27,206 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-08 14:25:27,206 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 130 transitions. [2024-11-08 14:25:27,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-08 14:25:27,206 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:25:27,206 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 14:25:27,219 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-08 14:25:27,410 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,SelfDestructingSolverStorable5 [2024-11-08 14:25:27,410 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:25:27,410 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:25:27,410 INFO L85 PathProgramCache]: Analyzing trace with hash -1127291835, now seen corresponding path program 1 times [2024-11-08 14:25:27,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 14:25:27,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187823216] [2024-11-08 14:25:27,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:25:27,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 14:25:27,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:25:27,479 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 14:25:27,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:25:27,499 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-08 14:25:27,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:25:27,505 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 14:25:27,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 14:25:27,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187823216] [2024-11-08 14:25:27,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187823216] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 14:25:27,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669383813] [2024-11-08 14:25:27,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:25:27,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:25:27,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 14:25:27,510 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) [2024-11-08 14:25:27,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-08 14:25:27,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:25:27,555 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-08 14:25:27,556 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 14:25:27,592 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 14:25:27,595 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 14:25:27,656 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 14:25:27,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669383813] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 14:25:27,656 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 14:25:27,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 9 [2024-11-08 14:25:27,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269507230] [2024-11-08 14:25:27,657 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 14:25:27,657 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-08 14:25:27,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 14:25:27,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-08 14:25:27,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-11-08 14:25:27,659 INFO L87 Difference]: Start difference. First operand 97 states and 130 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-08 14:25:27,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 14:25:27,834 INFO L93 Difference]: Finished difference Result 183 states and 261 transitions. [2024-11-08 14:25:27,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-08 14:25:27,835 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 27 [2024-11-08 14:25:27,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 14:25:27,836 INFO L225 Difference]: With dead ends: 183 [2024-11-08 14:25:27,836 INFO L226 Difference]: Without dead ends: 171 [2024-11-08 14:25:27,838 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 52 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2024-11-08 14:25:27,839 INFO L432 NwaCegarLoop]: 49 mSDtfsCounter, 114 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 14:25:27,839 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 283 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 14:25:27,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2024-11-08 14:25:27,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 128. [2024-11-08 14:25:27,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 97 states have (on average 1.3505154639175259) internal successors, (131), 98 states have internal predecessors, (131), 23 states have call successors, (23), 7 states have call predecessors, (23), 7 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2024-11-08 14:25:27,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 176 transitions. [2024-11-08 14:25:27,863 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 176 transitions. Word has length 27 [2024-11-08 14:25:27,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 14:25:27,864 INFO L471 AbstractCegarLoop]: Abstraction has 128 states and 176 transitions. [2024-11-08 14:25:27,864 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-08 14:25:27,864 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 176 transitions. [2024-11-08 14:25:27,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-08 14:25:27,864 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:25:27,864 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 14:25:27,877 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-08 14:25:28,065 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:25:28,065 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:25:28,065 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:25:28,066 INFO L85 PathProgramCache]: Analyzing trace with hash -200071253, now seen corresponding path program 1 times [2024-11-08 14:25:28,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 14:25:28,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277854398] [2024-11-08 14:25:28,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:25:28,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 14:25:28,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-08 14:25:28,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [6642605] [2024-11-08 14:25:28,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:25:28,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:25:28,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 14:25:28,076 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) [2024-11-08 14:25:28,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-08 14:25:28,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:25:28,110 INFO L255 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-08 14:25:28,111 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 14:25:28,191 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 14:25:28,192 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-08 14:25:28,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 14:25:28,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277854398] [2024-11-08 14:25:28,192 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-08 14:25:28,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6642605] [2024-11-08 14:25:28,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6642605] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 14:25:28,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 14:25:28,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-08 14:25:28,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851151109] [2024-11-08 14:25:28,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 14:25:28,193 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 14:25:28,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 14:25:28,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 14:25:28,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-08 14:25:28,194 INFO L87 Difference]: Start difference. First operand 128 states and 176 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-08 14:25:28,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 14:25:28,237 INFO L93 Difference]: Finished difference Result 143 states and 190 transitions. [2024-11-08 14:25:28,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 14:25:28,237 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2024-11-08 14:25:28,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 14:25:28,238 INFO L225 Difference]: With dead ends: 143 [2024-11-08 14:25:28,239 INFO L226 Difference]: Without dead ends: 141 [2024-11-08 14:25:28,239 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-08 14:25:28,239 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 9 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-08 14:25:28,240 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 136 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-08 14:25:28,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2024-11-08 14:25:28,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 140. [2024-11-08 14:25:28,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 106 states have (on average 1.320754716981132) internal successors, (140), 107 states have internal predecessors, (140), 23 states have call successors, (23), 10 states have call predecessors, (23), 10 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2024-11-08 14:25:28,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 185 transitions. [2024-11-08 14:25:28,258 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 185 transitions. Word has length 30 [2024-11-08 14:25:28,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 14:25:28,258 INFO L471 AbstractCegarLoop]: Abstraction has 140 states and 185 transitions. [2024-11-08 14:25:28,258 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-08 14:25:28,259 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 185 transitions. [2024-11-08 14:25:28,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-08 14:25:28,260 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:25:28,261 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 14:25:28,273 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-08 14:25:28,464 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:25:28,465 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:25:28,465 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:25:28,465 INFO L85 PathProgramCache]: Analyzing trace with hash 164485690, now seen corresponding path program 1 times [2024-11-08 14:25:28,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 14:25:28,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118519977] [2024-11-08 14:25:28,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:25:28,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 14:25:28,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-08 14:25:28,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1452360057] [2024-11-08 14:25:28,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:25:28,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:25:28,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 14:25:28,487 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) [2024-11-08 14:25:28,490 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-08 14:25:28,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:25:28,533 INFO L255 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-08 14:25:28,534 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 14:25:28,636 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 14:25:28,636 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 14:25:28,765 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 14:25:28,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 14:25:28,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118519977] [2024-11-08 14:25:28,766 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-08 14:25:28,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452360057] [2024-11-08 14:25:28,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452360057] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 14:25:28,766 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-08 14:25:28,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2024-11-08 14:25:28,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826113966] [2024-11-08 14:25:28,767 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-08 14:25:28,767 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-08 14:25:28,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 14:25:28,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-08 14:25:28,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-08 14:25:28,769 INFO L87 Difference]: Start difference. First operand 140 states and 185 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-08 14:25:28,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 14:25:28,915 INFO L93 Difference]: Finished difference Result 175 states and 237 transitions. [2024-11-08 14:25:28,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-08 14:25:28,915 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 32 [2024-11-08 14:25:28,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 14:25:28,916 INFO L225 Difference]: With dead ends: 175 [2024-11-08 14:25:28,916 INFO L226 Difference]: Without dead ends: 173 [2024-11-08 14:25:28,917 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-11-08 14:25:28,917 INFO L432 NwaCegarLoop]: 58 mSDtfsCounter, 35 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 14:25:28,917 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 232 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 14:25:28,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2024-11-08 14:25:28,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 170. [2024-11-08 14:25:28,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 127 states have (on average 1.3464566929133859) internal successors, (171), 128 states have internal predecessors, (171), 31 states have call successors, (31), 11 states have call predecessors, (31), 11 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2024-11-08 14:25:28,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 232 transitions. [2024-11-08 14:25:28,931 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 232 transitions. Word has length 32 [2024-11-08 14:25:28,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 14:25:28,931 INFO L471 AbstractCegarLoop]: Abstraction has 170 states and 232 transitions. [2024-11-08 14:25:28,931 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-08 14:25:28,931 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 232 transitions. [2024-11-08 14:25:28,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-08 14:25:28,932 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:25:28,932 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 14:25:28,945 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-08 14:25:29,136 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:25:29,137 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:25:29,137 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:25:29,137 INFO L85 PathProgramCache]: Analyzing trace with hash 1985711111, now seen corresponding path program 1 times [2024-11-08 14:25:29,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 14:25:29,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870578162] [2024-11-08 14:25:29,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:25:29,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 14:25:29,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:25:29,180 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 14:25:29,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:25:29,183 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-08 14:25:29,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:25:29,185 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 14:25:29,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 14:25:29,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870578162] [2024-11-08 14:25:29,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870578162] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 14:25:29,185 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 14:25:29,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-08 14:25:29,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77306956] [2024-11-08 14:25:29,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 14:25:29,186 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-08 14:25:29,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 14:25:29,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-08 14:25:29,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-11-08 14:25:29,187 INFO L87 Difference]: Start difference. First operand 170 states and 232 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-08 14:25:29,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 14:25:29,226 INFO L93 Difference]: Finished difference Result 237 states and 325 transitions. [2024-11-08 14:25:29,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-08 14:25:29,227 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 32 [2024-11-08 14:25:29,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 14:25:29,228 INFO L225 Difference]: With dead ends: 237 [2024-11-08 14:25:29,229 INFO L226 Difference]: Without dead ends: 170 [2024-11-08 14:25:29,229 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-11-08 14:25:29,229 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 13 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-08 14:25:29,230 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 105 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-08 14:25:29,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2024-11-08 14:25:29,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 170. [2024-11-08 14:25:29,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 127 states have (on average 1.3385826771653544) internal successors, (170), 128 states have internal predecessors, (170), 31 states have call successors, (31), 11 states have call predecessors, (31), 11 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2024-11-08 14:25:29,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 231 transitions. [2024-11-08 14:25:29,244 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 231 transitions. Word has length 32 [2024-11-08 14:25:29,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 14:25:29,245 INFO L471 AbstractCegarLoop]: Abstraction has 170 states and 231 transitions. [2024-11-08 14:25:29,245 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-08 14:25:29,245 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 231 transitions. [2024-11-08 14:25:29,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-08 14:25:29,247 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:25:29,247 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 14:25:29,247 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-08 14:25:29,247 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:25:29,248 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:25:29,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1730540965, now seen corresponding path program 1 times [2024-11-08 14:25:29,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 14:25:29,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929775764] [2024-11-08 14:25:29,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:25:29,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 14:25:29,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-08 14:25:29,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [300325962] [2024-11-08 14:25:29,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:25:29,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:25:29,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 14:25:29,258 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) [2024-11-08 14:25:29,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-08 14:25:29,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:25:29,297 INFO L255 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-08 14:25:29,298 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 14:25:29,330 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-08 14:25:29,330 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-08 14:25:29,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 14:25:29,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929775764] [2024-11-08 14:25:29,331 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-08 14:25:29,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300325962] [2024-11-08 14:25:29,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300325962] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 14:25:29,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 14:25:29,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-08 14:25:29,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062242694] [2024-11-08 14:25:29,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 14:25:29,332 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 14:25:29,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 14:25:29,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 14:25:29,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-08 14:25:29,332 INFO L87 Difference]: Start difference. First operand 170 states and 231 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-08 14:25:29,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 14:25:29,379 INFO L93 Difference]: Finished difference Result 235 states and 331 transitions. [2024-11-08 14:25:29,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 14:25:29,379 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 35 [2024-11-08 14:25:29,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 14:25:29,380 INFO L225 Difference]: With dead ends: 235 [2024-11-08 14:25:29,380 INFO L226 Difference]: Without dead ends: 233 [2024-11-08 14:25:29,381 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-08 14:25:29,381 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 8 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-08 14:25:29,381 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 128 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-08 14:25:29,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2024-11-08 14:25:29,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 226. [2024-11-08 14:25:29,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 160 states have (on average 1.36875) internal successors, (219), 161 states have internal predecessors, (219), 51 states have call successors, (51), 14 states have call predecessors, (51), 14 states have return successors, (50), 50 states have call predecessors, (50), 50 states have call successors, (50) [2024-11-08 14:25:29,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 320 transitions. [2024-11-08 14:25:29,398 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 320 transitions. Word has length 35 [2024-11-08 14:25:29,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 14:25:29,398 INFO L471 AbstractCegarLoop]: Abstraction has 226 states and 320 transitions. [2024-11-08 14:25:29,399 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-08 14:25:29,399 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 320 transitions. [2024-11-08 14:25:29,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-08 14:25:29,399 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:25:29,399 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 14:25:29,412 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-08 14:25:29,600 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:25:29,600 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:25:29,600 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:25:29,600 INFO L85 PathProgramCache]: Analyzing trace with hash -2009961290, now seen corresponding path program 1 times [2024-11-08 14:25:29,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 14:25:29,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721762436] [2024-11-08 14:25:29,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:25:29,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 14:25:29,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-08 14:25:29,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [219474779] [2024-11-08 14:25:29,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:25:29,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:25:29,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 14:25:29,614 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) [2024-11-08 14:25:29,615 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-08 14:25:29,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:25:29,652 INFO L255 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-08 14:25:29,653 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 14:25:29,831 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 14:25:29,832 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 14:25:29,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 14:25:29,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721762436] [2024-11-08 14:25:29,866 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-08 14:25:29,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219474779] [2024-11-08 14:25:29,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219474779] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 14:25:29,866 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-08 14:25:29,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2024-11-08 14:25:29,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208772081] [2024-11-08 14:25:29,867 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-08 14:25:29,867 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-08 14:25:29,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 14:25:29,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-08 14:25:29,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2024-11-08 14:25:29,868 INFO L87 Difference]: Start difference. First operand 226 states and 320 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-08 14:25:30,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 14:25:30,025 INFO L93 Difference]: Finished difference Result 238 states and 330 transitions. [2024-11-08 14:25:30,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-08 14:25:30,026 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 37 [2024-11-08 14:25:30,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 14:25:30,027 INFO L225 Difference]: With dead ends: 238 [2024-11-08 14:25:30,028 INFO L226 Difference]: Without dead ends: 236 [2024-11-08 14:25:30,028 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2024-11-08 14:25:30,029 INFO L432 NwaCegarLoop]: 44 mSDtfsCounter, 62 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 14:25:30,029 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 281 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 14:25:30,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2024-11-08 14:25:30,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 234. [2024-11-08 14:25:30,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 166 states have (on average 1.355421686746988) internal successors, (225), 167 states have internal predecessors, (225), 51 states have call successors, (51), 16 states have call predecessors, (51), 16 states have return successors, (50), 50 states have call predecessors, (50), 50 states have call successors, (50) [2024-11-08 14:25:30,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 326 transitions. [2024-11-08 14:25:30,046 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 326 transitions. Word has length 37 [2024-11-08 14:25:30,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 14:25:30,047 INFO L471 AbstractCegarLoop]: Abstraction has 234 states and 326 transitions. [2024-11-08 14:25:30,047 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-08 14:25:30,047 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 326 transitions. [2024-11-08 14:25:30,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-08 14:25:30,048 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:25:30,048 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 14:25:30,060 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-08 14:25:30,252 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:25:30,253 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:25:30,253 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:25:30,253 INFO L85 PathProgramCache]: Analyzing trace with hash -1954288725, now seen corresponding path program 1 times [2024-11-08 14:25:30,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 14:25:30,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628716390] [2024-11-08 14:25:30,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:25:30,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 14:25:30,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-08 14:25:30,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2095111826] [2024-11-08 14:25:30,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:25:30,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:25:30,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 14:25:30,268 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) [2024-11-08 14:25:30,269 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-08 14:25:30,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:25:30,305 INFO L255 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-08 14:25:30,306 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 14:25:30,334 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-08 14:25:30,334 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-08 14:25:30,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 14:25:30,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628716390] [2024-11-08 14:25:30,335 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-08 14:25:30,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095111826] [2024-11-08 14:25:30,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095111826] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 14:25:30,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 14:25:30,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-08 14:25:30,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557140847] [2024-11-08 14:25:30,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 14:25:30,335 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 14:25:30,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 14:25:30,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 14:25:30,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-08 14:25:30,336 INFO L87 Difference]: Start difference. First operand 234 states and 326 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-08 14:25:30,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 14:25:30,385 INFO L93 Difference]: Finished difference Result 309 states and 454 transitions. [2024-11-08 14:25:30,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 14:25:30,387 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 40 [2024-11-08 14:25:30,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 14:25:30,388 INFO L225 Difference]: With dead ends: 309 [2024-11-08 14:25:30,389 INFO L226 Difference]: Without dead ends: 307 [2024-11-08 14:25:30,390 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-08 14:25:30,391 INFO L432 NwaCegarLoop]: 38 mSDtfsCounter, 5 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-08 14:25:30,391 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 136 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-08 14:25:30,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2024-11-08 14:25:30,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 292. [2024-11-08 14:25:30,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 187 states have (on average 1.358288770053476) internal successors, (254), 197 states have internal predecessors, (254), 87 states have call successors, (87), 17 states have call predecessors, (87), 17 states have return successors, (86), 77 states have call predecessors, (86), 86 states have call successors, (86) [2024-11-08 14:25:30,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 427 transitions. [2024-11-08 14:25:30,417 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 427 transitions. Word has length 40 [2024-11-08 14:25:30,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 14:25:30,417 INFO L471 AbstractCegarLoop]: Abstraction has 292 states and 427 transitions. [2024-11-08 14:25:30,417 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-08 14:25:30,418 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 427 transitions. [2024-11-08 14:25:30,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-11-08 14:25:30,419 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:25:30,419 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 14:25:30,431 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-08 14:25:30,619 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,SelfDestructingSolverStorable12 [2024-11-08 14:25:30,620 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:25:30,620 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:25:30,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1977082887, now seen corresponding path program 1 times [2024-11-08 14:25:30,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 14:25:30,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276603512] [2024-11-08 14:25:30,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:25:30,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 14:25:30,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:25:30,673 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 14:25:30,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:25:30,675 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-08 14:25:30,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:25:30,677 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-08 14:25:30,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 14:25:30,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276603512] [2024-11-08 14:25:30,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276603512] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 14:25:30,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750819116] [2024-11-08 14:25:30,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:25:30,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:25:30,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 14:25:30,679 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) [2024-11-08 14:25:30,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-08 14:25:30,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:25:30,717 INFO L255 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-08 14:25:30,719 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 14:25:30,756 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-08 14:25:30,757 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 14:25:30,817 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-08 14:25:30,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750819116] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 14:25:30,818 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 14:25:30,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 12 [2024-11-08 14:25:30,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128543210] [2024-11-08 14:25:30,818 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 14:25:30,818 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-08 14:25:30,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 14:25:30,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-08 14:25:30,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2024-11-08 14:25:30,819 INFO L87 Difference]: Start difference. First operand 292 states and 427 transitions. Second operand has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-08 14:25:31,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 14:25:31,018 INFO L93 Difference]: Finished difference Result 725 states and 1031 transitions. [2024-11-08 14:25:31,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-08 14:25:31,019 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 38 [2024-11-08 14:25:31,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 14:25:31,024 INFO L225 Difference]: With dead ends: 725 [2024-11-08 14:25:31,024 INFO L226 Difference]: Without dead ends: 575 [2024-11-08 14:25:31,025 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=179, Unknown=0, NotChecked=0, Total=272 [2024-11-08 14:25:31,025 INFO L432 NwaCegarLoop]: 45 mSDtfsCounter, 137 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 14:25:31,026 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 277 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 14:25:31,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2024-11-08 14:25:31,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 541. [2024-11-08 14:25:31,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 541 states, 357 states have (on average 1.2997198879551821) internal successors, (464), 371 states have internal predecessors, (464), 142 states have call successors, (142), 41 states have call predecessors, (142), 41 states have return successors, (138), 128 states have call predecessors, (138), 138 states have call successors, (138) [2024-11-08 14:25:31,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 541 states to 541 states and 744 transitions. [2024-11-08 14:25:31,076 INFO L78 Accepts]: Start accepts. Automaton has 541 states and 744 transitions. Word has length 38 [2024-11-08 14:25:31,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 14:25:31,077 INFO L471 AbstractCegarLoop]: Abstraction has 541 states and 744 transitions. [2024-11-08 14:25:31,077 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-08 14:25:31,077 INFO L276 IsEmpty]: Start isEmpty. Operand 541 states and 744 transitions. [2024-11-08 14:25:31,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-08 14:25:31,078 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:25:31,078 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 14:25:31,091 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-08 14:25:31,278 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-08 14:25:31,279 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:25:31,279 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:25:31,279 INFO L85 PathProgramCache]: Analyzing trace with hash 321915013, now seen corresponding path program 2 times [2024-11-08 14:25:31,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 14:25:31,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778403433] [2024-11-08 14:25:31,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:25:31,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 14:25:31,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:25:31,318 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 14:25:31,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:25:31,320 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-08 14:25:31,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:25:31,321 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 14:25:31,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 14:25:31,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778403433] [2024-11-08 14:25:31,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778403433] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 14:25:31,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 14:25:31,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-08 14:25:31,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236698479] [2024-11-08 14:25:31,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 14:25:31,322 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 14:25:31,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 14:25:31,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 14:25:31,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-08 14:25:31,323 INFO L87 Difference]: Start difference. First operand 541 states and 744 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-08 14:25:31,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 14:25:31,425 INFO L93 Difference]: Finished difference Result 789 states and 1136 transitions. [2024-11-08 14:25:31,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-08 14:25:31,428 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 39 [2024-11-08 14:25:31,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 14:25:31,433 INFO L225 Difference]: With dead ends: 789 [2024-11-08 14:25:31,433 INFO L226 Difference]: Without dead ends: 644 [2024-11-08 14:25:31,435 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-11-08 14:25:31,435 INFO L432 NwaCegarLoop]: 53 mSDtfsCounter, 29 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-08 14:25:31,435 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 174 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-08 14:25:31,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 644 states. [2024-11-08 14:25:31,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 644 to 539. [2024-11-08 14:25:31,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 539 states, 359 states have (on average 1.3064066852367688) internal successors, (469), 373 states have internal predecessors, (469), 138 states have call successors, (138), 41 states have call predecessors, (138), 41 states have return successors, (134), 124 states have call predecessors, (134), 134 states have call successors, (134) [2024-11-08 14:25:31,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 741 transitions. [2024-11-08 14:25:31,485 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 741 transitions. Word has length 39 [2024-11-08 14:25:31,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 14:25:31,485 INFO L471 AbstractCegarLoop]: Abstraction has 539 states and 741 transitions. [2024-11-08 14:25:31,485 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-08 14:25:31,485 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 741 transitions. [2024-11-08 14:25:31,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-08 14:25:31,485 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:25:31,485 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 14:25:31,486 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-08 14:25:31,486 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:25:31,486 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:25:31,486 INFO L85 PathProgramCache]: Analyzing trace with hash -1715872859, now seen corresponding path program 1 times [2024-11-08 14:25:31,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 14:25:31,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014756036] [2024-11-08 14:25:31,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:25:31,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 14:25:31,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:25:31,573 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 14:25:31,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:25:31,576 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-08 14:25:31,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:25:31,579 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 14:25:31,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 14:25:31,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014756036] [2024-11-08 14:25:31,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014756036] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 14:25:31,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627547238] [2024-11-08 14:25:31,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:25:31,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:25:31,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 14:25:31,582 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) [2024-11-08 14:25:31,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-08 14:25:31,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:25:31,620 INFO L255 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-08 14:25:31,621 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 14:25:31,655 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 14:25:31,656 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 14:25:31,728 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 14:25:31,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627547238] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 14:25:31,728 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 14:25:31,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 14 [2024-11-08 14:25:31,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411967470] [2024-11-08 14:25:31,729 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 14:25:31,729 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-08 14:25:31,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 14:25:31,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-08 14:25:31,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2024-11-08 14:25:31,730 INFO L87 Difference]: Start difference. First operand 539 states and 741 transitions. Second operand has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-08 14:25:32,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 14:25:32,012 INFO L93 Difference]: Finished difference Result 1163 states and 1625 transitions. [2024-11-08 14:25:32,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-08 14:25:32,013 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 39 [2024-11-08 14:25:32,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 14:25:32,016 INFO L225 Difference]: With dead ends: 1163 [2024-11-08 14:25:32,016 INFO L226 Difference]: Without dead ends: 840 [2024-11-08 14:25:32,017 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=144, Invalid=276, Unknown=0, NotChecked=0, Total=420 [2024-11-08 14:25:32,018 INFO L432 NwaCegarLoop]: 39 mSDtfsCounter, 210 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-08 14:25:32,018 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [210 Valid, 279 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-08 14:25:32,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 840 states. [2024-11-08 14:25:32,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 840 to 803. [2024-11-08 14:25:32,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 803 states, 533 states have (on average 1.24953095684803) internal successors, (666), 555 states have internal predecessors, (666), 212 states have call successors, (212), 57 states have call predecessors, (212), 57 states have return successors, (206), 190 states have call predecessors, (206), 206 states have call successors, (206) [2024-11-08 14:25:32,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 803 states to 803 states and 1084 transitions. [2024-11-08 14:25:32,095 INFO L78 Accepts]: Start accepts. Automaton has 803 states and 1084 transitions. Word has length 39 [2024-11-08 14:25:32,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 14:25:32,096 INFO L471 AbstractCegarLoop]: Abstraction has 803 states and 1084 transitions. [2024-11-08 14:25:32,096 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-08 14:25:32,096 INFO L276 IsEmpty]: Start isEmpty. Operand 803 states and 1084 transitions. [2024-11-08 14:25:32,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-08 14:25:32,097 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:25:32,097 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 14:25:32,114 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-08 14:25:32,297 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,SelfDestructingSolverStorable15 [2024-11-08 14:25:32,297 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:25:32,298 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:25:32,298 INFO L85 PathProgramCache]: Analyzing trace with hash 753696694, now seen corresponding path program 1 times [2024-11-08 14:25:32,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 14:25:32,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309860477] [2024-11-08 14:25:32,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:25:32,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 14:25:32,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-08 14:25:32,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [435143343] [2024-11-08 14:25:32,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:25:32,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:25:32,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 14:25:32,317 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) [2024-11-08 14:25:32,318 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-08 14:25:32,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:25:32,374 INFO L255 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-11-08 14:25:32,376 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 14:25:32,926 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-08 14:25:32,927 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 14:25:34,314 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-08 14:25:34,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 14:25:34,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309860477] [2024-11-08 14:25:34,314 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-08 14:25:34,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435143343] [2024-11-08 14:25:34,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435143343] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 14:25:34,315 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-08 14:25:34,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2024-11-08 14:25:34,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352490335] [2024-11-08 14:25:34,315 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-08 14:25:34,315 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-08 14:25:34,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 14:25:34,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-08 14:25:34,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2024-11-08 14:25:34,316 INFO L87 Difference]: Start difference. First operand 803 states and 1084 transitions. Second operand has 23 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 20 states have internal predecessors, (52), 6 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2024-11-08 14:25:38,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 14:25:38,735 INFO L93 Difference]: Finished difference Result 1218 states and 1723 transitions. [2024-11-08 14:25:38,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-11-08 14:25:38,736 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 20 states have internal predecessors, (52), 6 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 54 [2024-11-08 14:25:38,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 14:25:38,742 INFO L225 Difference]: With dead ends: 1218 [2024-11-08 14:25:38,742 INFO L226 Difference]: Without dead ends: 1196 [2024-11-08 14:25:38,743 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 743 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=548, Invalid=2532, Unknown=0, NotChecked=0, Total=3080 [2024-11-08 14:25:38,743 INFO L432 NwaCegarLoop]: 85 mSDtfsCounter, 331 mSDsluCounter, 1065 mSDsCounter, 0 mSdLazyCounter, 809 mSolverCounterSat, 184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 1150 SdHoareTripleChecker+Invalid, 993 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 184 IncrementalHoareTripleChecker+Valid, 809 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2024-11-08 14:25:38,743 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [339 Valid, 1150 Invalid, 993 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [184 Valid, 809 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2024-11-08 14:25:38,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1196 states. [2024-11-08 14:25:38,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1196 to 885. [2024-11-08 14:25:38,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 885 states, 592 states have (on average 1.2533783783783783) internal successors, (742), 612 states have internal predecessors, (742), 231 states have call successors, (231), 61 states have call predecessors, (231), 61 states have return successors, (226), 211 states have call predecessors, (226), 226 states have call successors, (226) [2024-11-08 14:25:38,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 885 states to 885 states and 1199 transitions. [2024-11-08 14:25:38,905 INFO L78 Accepts]: Start accepts. Automaton has 885 states and 1199 transitions. Word has length 54 [2024-11-08 14:25:38,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 14:25:38,905 INFO L471 AbstractCegarLoop]: Abstraction has 885 states and 1199 transitions. [2024-11-08 14:25:38,905 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 20 states have internal predecessors, (52), 6 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2024-11-08 14:25:38,905 INFO L276 IsEmpty]: Start isEmpty. Operand 885 states and 1199 transitions. [2024-11-08 14:25:38,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-11-08 14:25:38,906 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:25:38,906 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 14:25:38,921 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-08 14:25:39,110 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,SelfDestructingSolverStorable16 [2024-11-08 14:25:39,111 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:25:39,111 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:25:39,111 INFO L85 PathProgramCache]: Analyzing trace with hash -2108492507, now seen corresponding path program 1 times [2024-11-08 14:25:39,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 14:25:39,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83856134] [2024-11-08 14:25:39,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:25:39,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 14:25:39,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:25:39,213 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 14:25:39,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:25:39,216 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-08 14:25:39,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:25:39,217 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-11-08 14:25:39,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:25:39,219 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-11-08 14:25:39,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:25:39,220 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-11-08 14:25:39,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:25:39,222 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-11-08 14:25:39,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:25:39,224 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-08 14:25:39,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 14:25:39,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83856134] [2024-11-08 14:25:39,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83856134] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 14:25:39,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660236602] [2024-11-08 14:25:39,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:25:39,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:25:39,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 14:25:39,226 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) [2024-11-08 14:25:39,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-08 14:25:39,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:25:39,269 INFO L255 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-08 14:25:39,270 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 14:25:39,318 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-08 14:25:39,318 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 14:25:39,395 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-08 14:25:39,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660236602] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 14:25:39,395 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 14:25:39,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 14 [2024-11-08 14:25:39,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15883335] [2024-11-08 14:25:39,395 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 14:25:39,396 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-08 14:25:39,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 14:25:39,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-08 14:25:39,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2024-11-08 14:25:39,396 INFO L87 Difference]: Start difference. First operand 885 states and 1199 transitions. Second operand has 14 states, 14 states have (on average 4.785714285714286) internal successors, (67), 14 states have internal predecessors, (67), 5 states have call successors, (19), 4 states have call predecessors, (19), 3 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2024-11-08 14:25:39,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 14:25:39,736 INFO L93 Difference]: Finished difference Result 962 states and 1278 transitions. [2024-11-08 14:25:39,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-08 14:25:39,736 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.785714285714286) internal successors, (67), 14 states have internal predecessors, (67), 5 states have call successors, (19), 4 states have call predecessors, (19), 3 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) Word has length 60 [2024-11-08 14:25:39,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 14:25:39,741 INFO L225 Difference]: With dead ends: 962 [2024-11-08 14:25:39,741 INFO L226 Difference]: Without dead ends: 940 [2024-11-08 14:25:39,742 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 123 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=149, Invalid=271, Unknown=0, NotChecked=0, Total=420 [2024-11-08 14:25:39,742 INFO L432 NwaCegarLoop]: 39 mSDtfsCounter, 152 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 14:25:39,742 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 297 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 14:25:39,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 940 states. [2024-11-08 14:25:39,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 940 to 909. [2024-11-08 14:25:39,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 909 states, 616 states have (on average 1.2305194805194806) internal successors, (758), 636 states have internal predecessors, (758), 231 states have call successors, (231), 61 states have call predecessors, (231), 61 states have return successors, (226), 211 states have call predecessors, (226), 226 states have call successors, (226) [2024-11-08 14:25:39,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 909 states to 909 states and 1215 transitions. [2024-11-08 14:25:39,880 INFO L78 Accepts]: Start accepts. Automaton has 909 states and 1215 transitions. Word has length 60 [2024-11-08 14:25:39,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 14:25:39,880 INFO L471 AbstractCegarLoop]: Abstraction has 909 states and 1215 transitions. [2024-11-08 14:25:39,881 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.785714285714286) internal successors, (67), 14 states have internal predecessors, (67), 5 states have call successors, (19), 4 states have call predecessors, (19), 3 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2024-11-08 14:25:39,881 INFO L276 IsEmpty]: Start isEmpty. Operand 909 states and 1215 transitions. [2024-11-08 14:25:39,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-11-08 14:25:39,881 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:25:39,881 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 14:25:39,894 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-08 14:25:40,084 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,SelfDestructingSolverStorable17 [2024-11-08 14:25:40,084 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:25:40,084 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:25:40,084 INFO L85 PathProgramCache]: Analyzing trace with hash 1269665814, now seen corresponding path program 1 times [2024-11-08 14:25:40,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 14:25:40,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902419044] [2024-11-08 14:25:40,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:25:40,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 14:25:40,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:25:40,122 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 14:25:40,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:25:40,124 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-08 14:25:40,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:25:40,125 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-11-08 14:25:40,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:25:40,127 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-11-08 14:25:40,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:25:40,131 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-11-08 14:25:40,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:25:40,133 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-11-08 14:25:40,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:25:40,134 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2024-11-08 14:25:40,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:25:40,136 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2024-11-08 14:25:40,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:25:40,137 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2024-11-08 14:25:40,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 14:25:40,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902419044] [2024-11-08 14:25:40,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902419044] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 14:25:40,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 14:25:40,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-08 14:25:40,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60851157] [2024-11-08 14:25:40,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 14:25:40,139 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 14:25:40,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 14:25:40,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 14:25:40,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-08 14:25:40,139 INFO L87 Difference]: Start difference. First operand 909 states and 1215 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2024-11-08 14:25:40,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 14:25:40,324 INFO L93 Difference]: Finished difference Result 1466 states and 1977 transitions. [2024-11-08 14:25:40,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 14:25:40,325 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 62 [2024-11-08 14:25:40,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 14:25:40,330 INFO L225 Difference]: With dead ends: 1466 [2024-11-08 14:25:40,330 INFO L226 Difference]: Without dead ends: 928 [2024-11-08 14:25:40,331 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-08 14:25:40,332 INFO L432 NwaCegarLoop]: 40 mSDtfsCounter, 3 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-08 14:25:40,332 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 131 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-08 14:25:40,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 928 states. [2024-11-08 14:25:40,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 928 to 904. [2024-11-08 14:25:40,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 904 states, 631 states have (on average 1.2393026941362917) internal successors, (782), 636 states have internal predecessors, (782), 211 states have call successors, (211), 61 states have call predecessors, (211), 61 states have return successors, (206), 206 states have call predecessors, (206), 206 states have call successors, (206) [2024-11-08 14:25:40,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 1199 transitions. [2024-11-08 14:25:40,458 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 1199 transitions. Word has length 62 [2024-11-08 14:25:40,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 14:25:40,458 INFO L471 AbstractCegarLoop]: Abstraction has 904 states and 1199 transitions. [2024-11-08 14:25:40,458 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2024-11-08 14:25:40,459 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 1199 transitions. [2024-11-08 14:25:40,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-11-08 14:25:40,459 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:25:40,459 INFO L215 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 14:25:40,459 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-11-08 14:25:40,459 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:25:40,460 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:25:40,460 INFO L85 PathProgramCache]: Analyzing trace with hash -862496580, now seen corresponding path program 1 times [2024-11-08 14:25:40,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 14:25:40,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006273003] [2024-11-08 14:25:40,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:25:40,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 14:25:40,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-08 14:25:40,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1946185325] [2024-11-08 14:25:40,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:25:40,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:25:40,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 14:25:40,471 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) [2024-11-08 14:25:40,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-08 14:25:40,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:25:40,513 INFO L255 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-08 14:25:40,516 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 14:25:40,560 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2024-11-08 14:25:40,560 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 14:25:40,607 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2024-11-08 14:25:40,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 14:25:40,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006273003] [2024-11-08 14:25:40,607 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-08 14:25:40,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946185325] [2024-11-08 14:25:40,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946185325] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-08 14:25:40,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-08 14:25:40,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2024-11-08 14:25:40,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799255583] [2024-11-08 14:25:40,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 14:25:40,608 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 14:25:40,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 14:25:40,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 14:25:40,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-08 14:25:40,608 INFO L87 Difference]: Start difference. First operand 904 states and 1199 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-08 14:25:40,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 14:25:40,759 INFO L93 Difference]: Finished difference Result 926 states and 1220 transitions. [2024-11-08 14:25:40,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 14:25:40,760 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 63 [2024-11-08 14:25:40,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 14:25:40,763 INFO L225 Difference]: With dead ends: 926 [2024-11-08 14:25:40,763 INFO L226 Difference]: Without dead ends: 924 [2024-11-08 14:25:40,764 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 117 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-11-08 14:25:40,767 INFO L432 NwaCegarLoop]: 38 mSDtfsCounter, 5 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-08 14:25:40,767 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 129 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-08 14:25:40,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 924 states. [2024-11-08 14:25:40,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 924 to 924. [2024-11-08 14:25:40,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 924 states, 646 states have (on average 1.2306501547987616) internal successors, (795), 651 states have internal predecessors, (795), 211 states have call successors, (211), 66 states have call predecessors, (211), 66 states have return successors, (206), 206 states have call predecessors, (206), 206 states have call successors, (206) [2024-11-08 14:25:40,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 924 states to 924 states and 1212 transitions. [2024-11-08 14:25:40,892 INFO L78 Accepts]: Start accepts. Automaton has 924 states and 1212 transitions. Word has length 63 [2024-11-08 14:25:40,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 14:25:40,892 INFO L471 AbstractCegarLoop]: Abstraction has 924 states and 1212 transitions. [2024-11-08 14:25:40,893 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-08 14:25:40,893 INFO L276 IsEmpty]: Start isEmpty. Operand 924 states and 1212 transitions. [2024-11-08 14:25:40,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-11-08 14:25:40,893 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:25:40,893 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 14:25:40,906 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-08 14:25:41,097 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,SelfDestructingSolverStorable19 [2024-11-08 14:25:41,098 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:25:41,098 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:25:41,098 INFO L85 PathProgramCache]: Analyzing trace with hash 1765617383, now seen corresponding path program 1 times [2024-11-08 14:25:41,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 14:25:41,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898791131] [2024-11-08 14:25:41,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:25:41,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 14:25:41,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-08 14:25:41,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1338833841] [2024-11-08 14:25:41,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:25:41,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:25:41,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 14:25:41,117 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) [2024-11-08 14:25:41,118 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-08 14:25:41,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:25:41,161 INFO L255 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-11-08 14:25:41,162 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 14:25:41,605 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 10 proven. 19 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2024-11-08 14:25:41,605 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 14:25:42,833 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 10 proven. 16 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-11-08 14:25:42,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 14:25:42,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898791131] [2024-11-08 14:25:42,833 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-08 14:25:42,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338833841] [2024-11-08 14:25:42,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338833841] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 14:25:42,833 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-08 14:25:42,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2024-11-08 14:25:42,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794534902] [2024-11-08 14:25:42,834 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-08 14:25:42,834 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-08 14:25:42,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 14:25:42,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-08 14:25:42,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2024-11-08 14:25:42,835 INFO L87 Difference]: Start difference. First operand 924 states and 1212 transitions. Second operand has 23 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 20 states have internal predecessors, (62), 6 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2024-11-08 14:25:45,876 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-08 14:25:48,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 14:25:48,001 INFO L93 Difference]: Finished difference Result 1139 states and 1529 transitions. [2024-11-08 14:25:48,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-11-08 14:25:48,002 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 20 states have internal predecessors, (62), 6 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) Word has length 64 [2024-11-08 14:25:48,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 14:25:48,006 INFO L225 Difference]: With dead ends: 1139 [2024-11-08 14:25:48,006 INFO L226 Difference]: Without dead ends: 1137 [2024-11-08 14:25:48,007 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=417, Invalid=1653, Unknown=0, NotChecked=0, Total=2070 [2024-11-08 14:25:48,007 INFO L432 NwaCegarLoop]: 51 mSDtfsCounter, 245 mSDsluCounter, 545 mSDsCounter, 0 mSdLazyCounter, 462 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 596 SdHoareTripleChecker+Invalid, 602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2024-11-08 14:25:48,007 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [253 Valid, 596 Invalid, 602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 462 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2024-11-08 14:25:48,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1137 states. [2024-11-08 14:25:48,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1137 to 1097. [2024-11-08 14:25:48,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1097 states, 771 states have (on average 1.25810635538262) internal successors, (970), 776 states have internal predecessors, (970), 255 states have call successors, (255), 70 states have call predecessors, (255), 70 states have return successors, (250), 250 states have call predecessors, (250), 250 states have call successors, (250) [2024-11-08 14:25:48,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1097 states to 1097 states and 1475 transitions. [2024-11-08 14:25:48,213 INFO L78 Accepts]: Start accepts. Automaton has 1097 states and 1475 transitions. Word has length 64 [2024-11-08 14:25:48,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 14:25:48,213 INFO L471 AbstractCegarLoop]: Abstraction has 1097 states and 1475 transitions. [2024-11-08 14:25:48,213 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 20 states have internal predecessors, (62), 6 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2024-11-08 14:25:48,214 INFO L276 IsEmpty]: Start isEmpty. Operand 1097 states and 1475 transitions. [2024-11-08 14:25:48,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-11-08 14:25:48,214 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:25:48,214 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 14:25:48,227 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-08 14:25:48,414 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:25:48,415 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:25:48,415 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:25:48,415 INFO L85 PathProgramCache]: Analyzing trace with hash -1447364546, now seen corresponding path program 2 times [2024-11-08 14:25:48,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 14:25:48,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700241967] [2024-11-08 14:25:48,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:25:48,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 14:25:48,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-08 14:25:48,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1338317986] [2024-11-08 14:25:48,433 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 14:25:48,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:25:48,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 14:25:48,434 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) [2024-11-08 14:25:48,435 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-08 14:25:48,479 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 14:25:48,480 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 14:25:48,481 INFO L255 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-11-08 14:25:48,482 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 14:25:48,797 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-08 14:25:48,798 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 14:25:48,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 14:25:48,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700241967] [2024-11-08 14:25:48,891 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-08 14:25:48,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338317986] [2024-11-08 14:25:48,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338317986] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 14:25:48,891 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-08 14:25:48,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2024-11-08 14:25:48,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297231534] [2024-11-08 14:25:48,891 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-08 14:25:48,892 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-08 14:25:48,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 14:25:48,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-08 14:25:48,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2024-11-08 14:25:48,892 INFO L87 Difference]: Start difference. First operand 1097 states and 1475 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 14 states have internal predecessors, (44), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-08 14:25:49,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 14:25:49,383 INFO L93 Difference]: Finished difference Result 1151 states and 1551 transitions. [2024-11-08 14:25:49,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-08 14:25:49,384 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 14 states have internal predecessors, (44), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 66 [2024-11-08 14:25:49,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 14:25:49,388 INFO L225 Difference]: With dead ends: 1151 [2024-11-08 14:25:49,388 INFO L226 Difference]: Without dead ends: 1149 [2024-11-08 14:25:49,389 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=121, Invalid=635, Unknown=0, NotChecked=0, Total=756 [2024-11-08 14:25:49,389 INFO L432 NwaCegarLoop]: 67 mSDtfsCounter, 100 mSDsluCounter, 489 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 556 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-08 14:25:49,389 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 556 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 357 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-08 14:25:49,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1149 states. [2024-11-08 14:25:49,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1149 to 1099. [2024-11-08 14:25:49,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1099 states, 772 states have (on average 1.2577720207253886) internal successors, (971), 777 states have internal predecessors, (971), 255 states have call successors, (255), 71 states have call predecessors, (255), 71 states have return successors, (250), 250 states have call predecessors, (250), 250 states have call successors, (250) [2024-11-08 14:25:49,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1099 states to 1099 states and 1476 transitions. [2024-11-08 14:25:49,603 INFO L78 Accepts]: Start accepts. Automaton has 1099 states and 1476 transitions. Word has length 66 [2024-11-08 14:25:49,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 14:25:49,603 INFO L471 AbstractCegarLoop]: Abstraction has 1099 states and 1476 transitions. [2024-11-08 14:25:49,603 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 14 states have internal predecessors, (44), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-08 14:25:49,603 INFO L276 IsEmpty]: Start isEmpty. Operand 1099 states and 1476 transitions. [2024-11-08 14:25:49,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2024-11-08 14:25:49,604 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:25:49,604 INFO L215 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 14:25:49,617 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-08 14:25:49,804 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:25:49,805 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:25:49,805 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:25:49,805 INFO L85 PathProgramCache]: Analyzing trace with hash -191939833, now seen corresponding path program 1 times [2024-11-08 14:25:49,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 14:25:49,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125843794] [2024-11-08 14:25:49,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:25:49,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 14:25:49,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-08 14:25:49,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1512419762] [2024-11-08 14:25:49,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:25:49,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:25:49,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 14:25:49,818 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) [2024-11-08 14:25:49,820 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-08 14:25:49,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:25:49,867 INFO L255 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-11-08 14:25:49,868 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 14:25:50,414 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 16 proven. 16 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2024-11-08 14:25:50,414 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 14:25:52,055 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 16 proven. 13 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2024-11-08 14:25:52,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 14:25:52,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125843794] [2024-11-08 14:25:52,056 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-08 14:25:52,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512419762] [2024-11-08 14:25:52,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512419762] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 14:25:52,056 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-08 14:25:52,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 25 [2024-11-08 14:25:52,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463515916] [2024-11-08 14:25:52,056 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-08 14:25:52,056 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-08 14:25:52,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 14:25:52,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-08 14:25:52,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2024-11-08 14:25:52,057 INFO L87 Difference]: Start difference. First operand 1099 states and 1476 transitions. Second operand has 25 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 22 states have internal predecessors, (58), 8 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2024-11-08 14:25:56,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 14:25:56,691 INFO L93 Difference]: Finished difference Result 1234 states and 1646 transitions. [2024-11-08 14:25:56,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2024-11-08 14:25:56,691 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 22 states have internal predecessors, (58), 8 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) Word has length 77 [2024-11-08 14:25:56,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 14:25:56,696 INFO L225 Difference]: With dead ends: 1234 [2024-11-08 14:25:56,696 INFO L226 Difference]: Without dead ends: 1227 [2024-11-08 14:25:56,697 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 867 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=737, Invalid=3045, Unknown=0, NotChecked=0, Total=3782 [2024-11-08 14:25:56,698 INFO L432 NwaCegarLoop]: 68 mSDtfsCounter, 280 mSDsluCounter, 864 mSDsCounter, 0 mSdLazyCounter, 853 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 932 SdHoareTripleChecker+Invalid, 1034 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 853 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2024-11-08 14:25:56,698 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [280 Valid, 932 Invalid, 1034 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 853 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2024-11-08 14:25:56,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1227 states. [2024-11-08 14:25:56,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1227 to 1190. [2024-11-08 14:25:56,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1190 states, 832 states have (on average 1.2487980769230769) internal successors, (1039), 834 states have internal predecessors, (1039), 276 states have call successors, (276), 81 states have call predecessors, (276), 81 states have return successors, (274), 274 states have call predecessors, (274), 274 states have call successors, (274) [2024-11-08 14:25:56,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1190 states to 1190 states and 1589 transitions. [2024-11-08 14:25:56,986 INFO L78 Accepts]: Start accepts. Automaton has 1190 states and 1589 transitions. Word has length 77 [2024-11-08 14:25:56,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 14:25:56,986 INFO L471 AbstractCegarLoop]: Abstraction has 1190 states and 1589 transitions. [2024-11-08 14:25:56,986 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 22 states have internal predecessors, (58), 8 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2024-11-08 14:25:56,986 INFO L276 IsEmpty]: Start isEmpty. Operand 1190 states and 1589 transitions. [2024-11-08 14:25:56,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2024-11-08 14:25:56,987 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:25:56,988 INFO L215 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 14:25:57,000 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-11-08 14:25:57,188 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-11-08 14:25:57,188 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:25:57,188 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:25:57,188 INFO L85 PathProgramCache]: Analyzing trace with hash -1411657149, now seen corresponding path program 1 times [2024-11-08 14:25:57,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 14:25:57,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633358487] [2024-11-08 14:25:57,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:25:57,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 14:25:57,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-08 14:25:57,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1858922860] [2024-11-08 14:25:57,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:25:57,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:25:57,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 14:25:57,203 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 14:25:57,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-08 14:25:57,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:25:57,254 INFO L255 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-11-08 14:25:57,256 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 14:25:57,643 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 16 proven. 44 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2024-11-08 14:25:57,643 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 14:25:57,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 14:25:57,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633358487] [2024-11-08 14:25:57,760 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-08 14:25:57,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858922860] [2024-11-08 14:25:57,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858922860] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 14:25:57,760 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-08 14:25:57,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2024-11-08 14:25:57,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614504359] [2024-11-08 14:25:57,760 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-08 14:25:57,761 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-08 14:25:57,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 14:25:57,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-08 14:25:57,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2024-11-08 14:25:57,761 INFO L87 Difference]: Start difference. First operand 1190 states and 1589 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 15 states have internal predecessors, (47), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) [2024-11-08 14:25:58,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 14:25:58,374 INFO L93 Difference]: Finished difference Result 1294 states and 1747 transitions. [2024-11-08 14:25:58,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-08 14:25:58,374 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 15 states have internal predecessors, (47), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) Word has length 89 [2024-11-08 14:25:58,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 14:25:58,379 INFO L225 Difference]: With dead ends: 1294 [2024-11-08 14:25:58,379 INFO L226 Difference]: Without dead ends: 1292 [2024-11-08 14:25:58,379 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=162, Invalid=768, Unknown=0, NotChecked=0, Total=930 [2024-11-08 14:25:58,380 INFO L432 NwaCegarLoop]: 49 mSDtfsCounter, 105 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-08 14:25:58,380 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 465 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 311 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-08 14:25:58,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1292 states. [2024-11-08 14:25:58,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1292 to 1244. [2024-11-08 14:25:58,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1244 states, 869 states have (on average 1.2589182968929804) internal successors, (1094), 871 states have internal predecessors, (1094), 292 states have call successors, (292), 82 states have call predecessors, (292), 82 states have return successors, (290), 290 states have call predecessors, (290), 290 states have call successors, (290) [2024-11-08 14:25:58,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1244 states to 1244 states and 1676 transitions. [2024-11-08 14:25:58,667 INFO L78 Accepts]: Start accepts. Automaton has 1244 states and 1676 transitions. Word has length 89 [2024-11-08 14:25:58,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 14:25:58,668 INFO L471 AbstractCegarLoop]: Abstraction has 1244 states and 1676 transitions. [2024-11-08 14:25:58,668 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 15 states have internal predecessors, (47), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) [2024-11-08 14:25:58,668 INFO L276 IsEmpty]: Start isEmpty. Operand 1244 states and 1676 transitions. [2024-11-08 14:25:58,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2024-11-08 14:25:58,669 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:25:58,669 INFO L215 NwaCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 14:25:58,681 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-11-08 14:25:58,869 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:25:58,869 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:25:58,869 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:25:58,870 INFO L85 PathProgramCache]: Analyzing trace with hash -558295812, now seen corresponding path program 2 times [2024-11-08 14:25:58,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 14:25:58,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732525797] [2024-11-08 14:25:58,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:25:58,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 14:25:58,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-08 14:25:58,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1285679738] [2024-11-08 14:25:58,882 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 14:25:58,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:25:58,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 14:25:58,884 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 14:25:58,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-08 14:25:58,940 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 14:25:58,941 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 14:25:58,942 INFO L255 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-08 14:25:58,943 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 14:25:59,115 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 26 proven. 23 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2024-11-08 14:25:59,116 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 14:25:59,482 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 29 proven. 17 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2024-11-08 14:25:59,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 14:25:59,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732525797] [2024-11-08 14:25:59,483 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-08 14:25:59,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285679738] [2024-11-08 14:25:59,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285679738] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 14:25:59,483 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-08 14:25:59,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2024-11-08 14:25:59,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246570727] [2024-11-08 14:25:59,483 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-08 14:25:59,483 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-08 14:25:59,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 14:25:59,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-08 14:25:59,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2024-11-08 14:25:59,485 INFO L87 Difference]: Start difference. First operand 1244 states and 1676 transitions. Second operand has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 18 states have internal predecessors, (57), 8 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2024-11-08 14:26:00,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 14:26:00,900 INFO L93 Difference]: Finished difference Result 2149 states and 3151 transitions. [2024-11-08 14:26:00,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-08 14:26:00,901 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 18 states have internal predecessors, (57), 8 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) Word has length 92 [2024-11-08 14:26:00,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 14:26:00,908 INFO L225 Difference]: With dead ends: 2149 [2024-11-08 14:26:00,909 INFO L226 Difference]: Without dead ends: 2145 [2024-11-08 14:26:00,909 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=345, Invalid=1215, Unknown=0, NotChecked=0, Total=1560 [2024-11-08 14:26:00,910 INFO L432 NwaCegarLoop]: 52 mSDtfsCounter, 202 mSDsluCounter, 452 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 504 SdHoareTripleChecker+Invalid, 469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-08 14:26:00,910 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [206 Valid, 504 Invalid, 469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 351 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-08 14:26:00,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2145 states. [2024-11-08 14:26:01,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2145 to 1977. [2024-11-08 14:26:01,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1977 states, 1237 states have (on average 1.3484236054971706) internal successors, (1668), 1238 states have internal predecessors, (1668), 648 states have call successors, (648), 92 states have call predecessors, (648), 91 states have return successors, (646), 646 states have call predecessors, (646), 646 states have call successors, (646) [2024-11-08 14:26:01,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1977 states to 1977 states and 2962 transitions. [2024-11-08 14:26:01,624 INFO L78 Accepts]: Start accepts. Automaton has 1977 states and 2962 transitions. Word has length 92 [2024-11-08 14:26:01,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 14:26:01,626 INFO L471 AbstractCegarLoop]: Abstraction has 1977 states and 2962 transitions. [2024-11-08 14:26:01,626 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 18 states have internal predecessors, (57), 8 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2024-11-08 14:26:01,626 INFO L276 IsEmpty]: Start isEmpty. Operand 1977 states and 2962 transitions. [2024-11-08 14:26:01,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2024-11-08 14:26:01,629 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:26:01,629 INFO L215 NwaCegarLoop]: trace histogram [9, 8, 8, 5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 14:26:01,642 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-08 14:26:01,829 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:26:01,830 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:26:01,830 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:26:01,830 INFO L85 PathProgramCache]: Analyzing trace with hash 704622192, now seen corresponding path program 1 times [2024-11-08 14:26:01,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 14:26:01,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501234031] [2024-11-08 14:26:01,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:26:01,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 14:26:01,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:01,997 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 14:26:01,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:01,999 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-08 14:26:02,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:02,001 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-11-08 14:26:02,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:02,007 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-11-08 14:26:02,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:02,009 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-11-08 14:26:02,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:02,012 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-11-08 14:26:02,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:02,014 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-11-08 14:26:02,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:02,016 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-11-08 14:26:02,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:02,020 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2024-11-08 14:26:02,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:02,022 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2024-11-08 14:26:02,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:02,023 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 24 proven. 44 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2024-11-08 14:26:02,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 14:26:02,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501234031] [2024-11-08 14:26:02,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501234031] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 14:26:02,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299357283] [2024-11-08 14:26:02,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:26:02,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:26:02,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 14:26:02,029 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 14:26:02,034 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-08 14:26:02,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:02,088 INFO L255 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-08 14:26:02,090 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 14:26:02,162 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 24 proven. 108 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2024-11-08 14:26:02,162 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 14:26:02,259 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 24 proven. 44 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2024-11-08 14:26:02,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299357283] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 14:26:02,259 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 14:26:02,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 13] total 13 [2024-11-08 14:26:02,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760821634] [2024-11-08 14:26:02,259 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 14:26:02,260 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-08 14:26:02,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 14:26:02,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-08 14:26:02,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2024-11-08 14:26:02,260 INFO L87 Difference]: Start difference. First operand 1977 states and 2962 transitions. Second operand has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 13 states have internal predecessors, (57), 4 states have call successors, (21), 5 states have call predecessors, (21), 4 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2024-11-08 14:26:03,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 14:26:03,101 INFO L93 Difference]: Finished difference Result 2821 states and 4393 transitions. [2024-11-08 14:26:03,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-08 14:26:03,102 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 13 states have internal predecessors, (57), 4 states have call successors, (21), 5 states have call predecessors, (21), 4 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) Word has length 93 [2024-11-08 14:26:03,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 14:26:03,110 INFO L225 Difference]: With dead ends: 2821 [2024-11-08 14:26:03,110 INFO L226 Difference]: Without dead ends: 2001 [2024-11-08 14:26:03,112 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 194 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=139, Invalid=241, Unknown=0, NotChecked=0, Total=380 [2024-11-08 14:26:03,113 INFO L432 NwaCegarLoop]: 41 mSDtfsCounter, 139 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 14:26:03,113 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 230 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 14:26:03,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2001 states. [2024-11-08 14:26:03,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2001 to 1999. [2024-11-08 14:26:03,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1999 states, 1259 states have (on average 1.334392374900715) internal successors, (1680), 1260 states have internal predecessors, (1680), 648 states have call successors, (648), 92 states have call predecessors, (648), 91 states have return successors, (646), 646 states have call predecessors, (646), 646 states have call successors, (646) [2024-11-08 14:26:03,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1999 states to 1999 states and 2974 transitions. [2024-11-08 14:26:03,782 INFO L78 Accepts]: Start accepts. Automaton has 1999 states and 2974 transitions. Word has length 93 [2024-11-08 14:26:03,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 14:26:03,783 INFO L471 AbstractCegarLoop]: Abstraction has 1999 states and 2974 transitions. [2024-11-08 14:26:03,783 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 13 states have internal predecessors, (57), 4 states have call successors, (21), 5 states have call predecessors, (21), 4 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2024-11-08 14:26:03,783 INFO L276 IsEmpty]: Start isEmpty. Operand 1999 states and 2974 transitions. [2024-11-08 14:26:03,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2024-11-08 14:26:03,784 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:26:03,784 INFO L215 NwaCegarLoop]: trace histogram [10, 9, 9, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 14:26:03,796 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-08 14:26:03,988 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:26:03,988 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:26:03,989 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:26:03,989 INFO L85 PathProgramCache]: Analyzing trace with hash 1736118861, now seen corresponding path program 3 times [2024-11-08 14:26:03,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 14:26:03,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199112193] [2024-11-08 14:26:03,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:26:03,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 14:26:04,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-08 14:26:04,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1513991521] [2024-11-08 14:26:04,002 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-08 14:26:04,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:26:04,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 14:26:04,004 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 14:26:04,005 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-08 14:26:04,057 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-08 14:26:04,057 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 14:26:04,061 INFO L255 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 73 conjuncts are in the unsatisfiable core [2024-11-08 14:26:04,064 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 14:26:04,925 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 41 proven. 47 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2024-11-08 14:26:04,925 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 14:26:05,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 14:26:05,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199112193] [2024-11-08 14:26:05,783 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-08 14:26:05,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513991521] [2024-11-08 14:26:05,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513991521] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 14:26:05,783 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-08 14:26:05,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2024-11-08 14:26:05,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565418126] [2024-11-08 14:26:05,784 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-08 14:26:05,784 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-08 14:26:05,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 14:26:05,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-08 14:26:05,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=590, Unknown=0, NotChecked=0, Total=702 [2024-11-08 14:26:05,785 INFO L87 Difference]: Start difference. First operand 1999 states and 2974 transitions. Second operand has 20 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 17 states have internal predecessors, (50), 6 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) [2024-11-08 14:26:07,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 14:26:07,016 INFO L93 Difference]: Finished difference Result 2158 states and 3213 transitions. [2024-11-08 14:26:07,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-08 14:26:07,017 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 17 states have internal predecessors, (50), 6 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) Word has length 94 [2024-11-08 14:26:07,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 14:26:07,024 INFO L225 Difference]: With dead ends: 2158 [2024-11-08 14:26:07,024 INFO L226 Difference]: Without dead ends: 2156 [2024-11-08 14:26:07,025 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=193, Invalid=997, Unknown=0, NotChecked=0, Total=1190 [2024-11-08 14:26:07,025 INFO L432 NwaCegarLoop]: 69 mSDtfsCounter, 105 mSDsluCounter, 919 mSDsCounter, 0 mSdLazyCounter, 862 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 988 SdHoareTripleChecker+Invalid, 936 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 862 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-08 14:26:07,025 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 988 Invalid, 936 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 862 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-08 14:26:07,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2156 states. [2024-11-08 14:26:07,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2156 to 2147. [2024-11-08 14:26:07,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2147 states, 1341 states have (on average 1.3385533184190903) internal successors, (1795), 1342 states have internal predecessors, (1795), 704 states have call successors, (704), 102 states have call predecessors, (704), 101 states have return successors, (702), 702 states have call predecessors, (702), 702 states have call successors, (702) [2024-11-08 14:26:07,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2147 states to 2147 states and 3201 transitions. [2024-11-08 14:26:07,804 INFO L78 Accepts]: Start accepts. Automaton has 2147 states and 3201 transitions. Word has length 94 [2024-11-08 14:26:07,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 14:26:07,804 INFO L471 AbstractCegarLoop]: Abstraction has 2147 states and 3201 transitions. [2024-11-08 14:26:07,804 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 17 states have internal predecessors, (50), 6 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) [2024-11-08 14:26:07,804 INFO L276 IsEmpty]: Start isEmpty. Operand 2147 states and 3201 transitions. [2024-11-08 14:26:07,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2024-11-08 14:26:07,805 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:26:07,805 INFO L215 NwaCegarLoop]: trace histogram [9, 8, 8, 5, 5, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 14:26:07,817 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-11-08 14:26:08,006 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-11-08 14:26:08,006 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:26:08,006 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:26:08,006 INFO L85 PathProgramCache]: Analyzing trace with hash 403460013, now seen corresponding path program 3 times [2024-11-08 14:26:08,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 14:26:08,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782273239] [2024-11-08 14:26:08,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:26:08,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 14:26:08,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:08,198 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 14:26:08,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:08,200 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-08 14:26:08,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:08,202 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-11-08 14:26:08,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:08,203 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-11-08 14:26:08,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:08,205 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-11-08 14:26:08,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:08,206 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-11-08 14:26:08,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:08,207 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-11-08 14:26:08,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:08,209 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2024-11-08 14:26:08,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:08,210 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2024-11-08 14:26:08,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:08,212 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-11-08 14:26:08,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:08,213 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 68 proven. 2 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2024-11-08 14:26:08,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 14:26:08,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782273239] [2024-11-08 14:26:08,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782273239] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 14:26:08,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715081527] [2024-11-08 14:26:08,214 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-08 14:26:08,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:26:08,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 14:26:08,216 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 14:26:08,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-08 14:26:08,264 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-08 14:26:08,264 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 14:26:08,265 INFO L255 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-08 14:26:08,267 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 14:26:08,339 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 132 proven. 2 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2024-11-08 14:26:08,340 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 14:26:08,459 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 68 proven. 2 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2024-11-08 14:26:08,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715081527] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 14:26:08,459 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 14:26:08,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 14] total 14 [2024-11-08 14:26:08,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159657443] [2024-11-08 14:26:08,460 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 14:26:08,460 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-08 14:26:08,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 14:26:08,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-08 14:26:08,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2024-11-08 14:26:08,461 INFO L87 Difference]: Start difference. First operand 2147 states and 3201 transitions. Second operand has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 14 states have internal predecessors, (57), 4 states have call successors, (21), 5 states have call predecessors, (21), 4 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2024-11-08 14:26:08,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 14:26:08,871 INFO L93 Difference]: Finished difference Result 2594 states and 3829 transitions. [2024-11-08 14:26:08,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-08 14:26:08,871 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 14 states have internal predecessors, (57), 4 states have call successors, (21), 5 states have call predecessors, (21), 4 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) Word has length 93 [2024-11-08 14:26:08,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 14:26:08,877 INFO L225 Difference]: With dead ends: 2594 [2024-11-08 14:26:08,877 INFO L226 Difference]: Without dead ends: 1268 [2024-11-08 14:26:08,880 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 194 SyntacticMatches, 11 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=94, Invalid=116, Unknown=0, NotChecked=0, Total=210 [2024-11-08 14:26:08,880 INFO L432 NwaCegarLoop]: 144 mSDtfsCounter, 162 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 14:26:08,881 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 431 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 14:26:08,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1268 states. [2024-11-08 14:26:09,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1268 to 923. [2024-11-08 14:26:09,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 923 states, 660 states have (on average 1.1151515151515152) internal successors, (736), 670 states have internal predecessors, (736), 165 states have call successors, (165), 98 states have call predecessors, (165), 97 states have return successors, (163), 154 states have call predecessors, (163), 163 states have call successors, (163) [2024-11-08 14:26:09,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 923 states to 923 states and 1064 transitions. [2024-11-08 14:26:09,130 INFO L78 Accepts]: Start accepts. Automaton has 923 states and 1064 transitions. Word has length 93 [2024-11-08 14:26:09,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 14:26:09,130 INFO L471 AbstractCegarLoop]: Abstraction has 923 states and 1064 transitions. [2024-11-08 14:26:09,131 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 14 states have internal predecessors, (57), 4 states have call successors, (21), 5 states have call predecessors, (21), 4 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2024-11-08 14:26:09,131 INFO L276 IsEmpty]: Start isEmpty. Operand 923 states and 1064 transitions. [2024-11-08 14:26:09,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2024-11-08 14:26:09,132 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:26:09,132 INFO L215 NwaCegarLoop]: trace histogram [9, 8, 8, 5, 5, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 14:26:09,147 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-11-08 14:26:09,336 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-08 14:26:09,336 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:26:09,337 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:26:09,337 INFO L85 PathProgramCache]: Analyzing trace with hash 784770345, now seen corresponding path program 2 times [2024-11-08 14:26:09,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 14:26:09,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831979157] [2024-11-08 14:26:09,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:26:09,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 14:26:09,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-08 14:26:09,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [415392076] [2024-11-08 14:26:09,350 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 14:26:09,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:26:09,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 14:26:09,352 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 14:26:09,353 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-08 14:26:09,429 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 14:26:09,430 INFO L228 tOrderPrioritization]: Conjunction of SSA is sat [2024-11-08 14:26:09,430 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-08 14:26:09,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-08 14:26:09,494 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-08 14:26:09,494 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-08 14:26:09,495 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-11-08 14:26:09,502 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-11-08 14:26:09,696 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-11-08 14:26:09,699 INFO L407 BasicCegarLoop]: Path program histogram: [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 14:26:09,734 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2024-11-08 14:26:09,736 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 08.11 02:26:09 BoogieIcfgContainer [2024-11-08 14:26:09,736 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-11-08 14:26:09,736 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-11-08 14:26:09,736 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-11-08 14:26:09,736 INFO L274 PluginConnector]: Witness Printer initialized [2024-11-08 14:26:09,737 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 02:25:25" (3/4) ... [2024-11-08 14:26:09,741 INFO L136 WitnessPrinter]: Generating witness for reachability counterexample [2024-11-08 14:26:09,797 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2024-11-08 14:26:09,798 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-11-08 14:26:09,798 INFO L158 Benchmark]: Toolchain (without parser) took 44913.98ms. Allocated memory was 142.6MB in the beginning and 834.7MB in the end (delta: 692.1MB). Free memory was 72.5MB in the beginning and 496.1MB in the end (delta: -423.6MB). Peak memory consumption was 269.2MB. Max. memory is 16.1GB. [2024-11-08 14:26:09,799 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 142.6MB. Free memory is still 109.6MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-08 14:26:09,799 INFO L158 Benchmark]: CACSL2BoogieTranslator took 213.16ms. Allocated memory was 142.6MB in the beginning and 188.7MB in the end (delta: 46.1MB). Free memory was 72.3MB in the beginning and 159.7MB in the end (delta: -87.4MB). Peak memory consumption was 18.6MB. Max. memory is 16.1GB. [2024-11-08 14:26:09,799 INFO L158 Benchmark]: Boogie Procedure Inliner took 31.19ms. Allocated memory is still 188.7MB. Free memory was 159.7MB in the beginning and 158.6MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-11-08 14:26:09,799 INFO L158 Benchmark]: Boogie Preprocessor took 32.56ms. Allocated memory is still 188.7MB. Free memory was 157.7MB in the beginning and 156.5MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-11-08 14:26:09,800 INFO L158 Benchmark]: RCFGBuilder took 276.00ms. Allocated memory is still 188.7MB. Free memory was 156.5MB in the beginning and 143.0MB in the end (delta: 13.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-11-08 14:26:09,800 INFO L158 Benchmark]: TraceAbstraction took 44295.07ms. Allocated memory was 188.7MB in the beginning and 834.7MB in the end (delta: 645.9MB). Free memory was 142.8MB in the beginning and 501.3MB in the end (delta: -358.6MB). Peak memory consumption was 288.4MB. Max. memory is 16.1GB. [2024-11-08 14:26:09,800 INFO L158 Benchmark]: Witness Printer took 61.36ms. Allocated memory is still 834.7MB. Free memory was 501.3MB in the beginning and 496.1MB in the end (delta: 5.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2024-11-08 14:26:09,801 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 142.6MB. Free memory is still 109.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 213.16ms. Allocated memory was 142.6MB in the beginning and 188.7MB in the end (delta: 46.1MB). Free memory was 72.3MB in the beginning and 159.7MB in the end (delta: -87.4MB). Peak memory consumption was 18.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 31.19ms. Allocated memory is still 188.7MB. Free memory was 159.7MB in the beginning and 158.6MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 32.56ms. Allocated memory is still 188.7MB. Free memory was 157.7MB in the beginning and 156.5MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 276.00ms. Allocated memory is still 188.7MB. Free memory was 156.5MB in the beginning and 143.0MB in the end (delta: 13.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 44295.07ms. Allocated memory was 188.7MB in the beginning and 834.7MB in the end (delta: 645.9MB). Free memory was 142.8MB in the beginning and 501.3MB in the end (delta: -358.6MB). Peak memory consumption was 288.4MB. Max. memory is 16.1GB. * Witness Printer took 61.36ms. Allocated memory is still 834.7MB. Free memory was 501.3MB in the beginning and 496.1MB in the end (delta: 5.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 13]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L18] int counter = 0; VAL [counter=0] [L20] int x, y; [L21] long long a, b, p, q, r, s; [L22] x = __VERIFIER_nondet_int() [L23] y = __VERIFIER_nondet_int() [L24] CALL assume_abort_if_not(x >= 1) VAL [\old(cond)=1, counter=0] [L8] COND FALSE !(!cond) VAL [\old(cond)=1, counter=0] [L24] RET assume_abort_if_not(x >= 1) VAL [counter=0, x=3, y=5] [L25] CALL assume_abort_if_not(y >= 1) VAL [\old(cond)=1, counter=0] [L8] COND FALSE !(!cond) VAL [\old(cond)=1, counter=0] [L25] RET assume_abort_if_not(y >= 1) VAL [counter=0, x=3, y=5] [L27] a = x [L28] b = y [L29] p = 1 [L30] q = 0 [L31] r = 0 [L32] s = 1 VAL [a=3, b=5, counter=0, p=1, q=0, r=0, s=1, x=3, y=5] [L34] EXPR counter++ VAL [a=3, b=5, counter=1, p=1, q=0, r=0, s=1, x=3, y=5] [L34] COND TRUE counter++<10 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 VAL [a=3, b=5, c=3, counter=1, k=0, p=1, q=0, r=0, s=1, x=3, y=5] [L41] EXPR counter++ VAL [a=3, b=5, c=3, counter=2, k=0, p=1, q=0, r=0, s=1, x=3, y=5] [L41] COND TRUE counter++<10 [L42] COND TRUE !(c >= b) VAL [a=3, b=5, c=3, counter=2, k=0, p=1, q=0, r=0, s=1, x=3, y=5] [L63] a = b [L64] b = c [L65] long long temp; [L66] temp = p [L67] p = q [L68] q = temp - q * k [L69] temp = r [L70] r = s [L71] s = temp - s * k [L34] EXPR counter++ VAL [a=5, b=3, counter=3, p=0, q=1, r=1, s=0, x=3, y=5] [L34] COND TRUE counter++<10 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 VAL [a=5, b=3, c=5, counter=3, k=0, p=0, q=1, r=1, s=0, x=3, y=5] [L41] EXPR counter++ VAL [a=5, b=3, c=5, counter=4, k=0, p=0, q=1, r=1, s=0, x=3, y=5] [L41] COND TRUE counter++<10 [L42] COND FALSE !(!(c >= b)) [L44] long long d, v; [L45] d = 1 [L46] v = b VAL [a=5, b=3, c=5, counter=4, d=1, k=0, p=0, q=1, r=1, s=0, v=3, x=3, y=5] [L48] EXPR counter++ VAL [a=5, b=3, c=5, counter=5, d=1, k=0, p=0, q=1, r=1, s=0, v=3, x=3, y=5] [L48] COND TRUE counter++<10 [L49] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, counter=5] [L49] RET __VERIFIER_assert(a == y * r + x * p) VAL [a=5, b=3, c=5, counter=5, d=1, k=0, p=0, q=1, r=1, s=0, v=3, x=3, y=5] [L50] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, counter=5] [L50] RET __VERIFIER_assert(b == x * q + y * s) VAL [a=5, b=3, c=5, counter=5, d=1, k=0, p=0, q=1, r=1, s=0, v=3, x=3, y=5] [L51] CALL __VERIFIER_assert(a == k * b + c) VAL [\old(cond)=1, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, counter=5] [L51] RET __VERIFIER_assert(a == k * b + c) VAL [a=5, b=3, c=5, counter=5, d=1, k=0, p=0, q=1, r=1, s=0, v=3, x=3, y=5] [L52] CALL __VERIFIER_assert(v == b * d) VAL [\old(cond)=1, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, counter=5] [L52] RET __VERIFIER_assert(v == b * d) VAL [a=5, b=3, c=5, counter=5, d=1, k=0, p=0, q=1, r=1, s=0, v=3, x=3, y=5] [L54] COND TRUE !(c >= 2 * v) VAL [a=5, b=3, c=5, counter=5, d=1, k=0, p=0, q=1, r=1, s=0, v=3, x=3, y=5] [L59] c = c - v [L60] k = k + d [L41] EXPR counter++ VAL [a=5, b=3, c=2, counter=6, k=1, p=0, q=1, r=1, s=0, x=3, y=5] [L41] COND TRUE counter++<10 [L42] COND TRUE !(c >= b) VAL [a=5, b=3, c=2, counter=6, k=1, p=0, q=1, r=1, s=0, x=3, y=5] [L63] a = b [L64] b = c [L65] long long temp; [L66] temp = p [L67] p = q [L68] q = temp - q * k [L69] temp = r [L70] r = s [L71] s = temp - s * k [L34] EXPR counter++ VAL [a=3, b=2, counter=7, p=1, q=-1, r=0, s=1, x=3, y=5] [L34] COND TRUE counter++<10 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 VAL [a=3, b=2, c=3, counter=7, k=0, p=1, q=-1, r=0, s=1, x=3, y=5] [L41] EXPR counter++ VAL [a=3, b=2, c=3, counter=8, k=0, p=1, q=-1, r=0, s=1, x=3, y=5] [L41] COND TRUE counter++<10 [L42] COND FALSE !(!(c >= b)) [L44] long long d, v; [L45] d = 1 [L46] v = b VAL [a=3, b=2, c=3, counter=8, d=1, k=0, p=1, q=-1, r=0, s=1, v=2, x=3, y=5] [L48] EXPR counter++ VAL [a=3, b=2, c=3, counter=9, d=1, k=0, p=1, q=-1, r=0, s=1, v=2, x=3, y=5] [L48] COND TRUE counter++<10 [L49] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, counter=9] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, counter=9] [L49] RET __VERIFIER_assert(a == y * r + x * p) VAL [a=3, b=2, c=3, counter=9, d=1, k=0, p=1, q=-1, r=0, s=1, v=2, x=3, y=5] [L50] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, counter=9] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, counter=9] [L50] RET __VERIFIER_assert(b == x * q + y * s) VAL [a=3, b=2, c=3, counter=9, d=1, k=0, p=1, q=-1, r=0, s=1, v=2, x=3, y=5] [L51] CALL __VERIFIER_assert(a == k * b + c) VAL [\old(cond)=1, counter=9] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, counter=9] [L51] RET __VERIFIER_assert(a == k * b + c) VAL [a=3, b=2, c=3, counter=9, d=1, k=0, p=1, q=-1, r=0, s=1, v=2, x=3, y=5] [L52] CALL __VERIFIER_assert(v == b * d) VAL [\old(cond)=1, counter=9] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, counter=9] [L52] RET __VERIFIER_assert(v == b * d) VAL [a=3, b=2, c=3, counter=9, d=1, k=0, p=1, q=-1, r=0, s=1, v=2, x=3, y=5] [L54] COND TRUE !(c >= 2 * v) VAL [a=3, b=2, c=3, counter=9, d=1, k=0, p=1, q=-1, r=0, s=1, v=2, x=3, y=5] [L59] c = c - v [L60] k = k + d [L41] EXPR counter++ VAL [a=3, b=2, c=1, counter=10, k=1, p=1, q=-1, r=0, s=1, x=3, y=5] [L41] COND TRUE counter++<10 [L42] COND TRUE !(c >= b) VAL [a=3, b=2, c=1, counter=10, k=1, p=1, q=-1, r=0, s=1, x=3, y=5] [L63] a = b [L64] b = c [L65] long long temp; [L66] temp = p [L67] p = q [L68] q = temp - q * k [L69] temp = r [L70] r = s [L71] s = temp - s * k [L34] EXPR counter++ VAL [a=2, b=1, counter=11, p=-1, q=2, r=1, s=-1, x=3, y=5] [L34] COND FALSE !(counter++<10) [L73] CALL __VERIFIER_assert(p*x - q*x + r*y - s*y == a) VAL [\old(cond)=0, counter=11] [L11] COND TRUE !(cond) VAL [\old(cond)=0, counter=11] [L13] reach_error() VAL [\old(cond)=0, counter=11] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 35 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 44.2s, OverallIterations: 29, TraceHistogramMax: 11, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 21.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2719 SdHoareTripleChecker+Valid, 9.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2610 mSDsluCounter, 9119 SdHoareTripleChecker+Invalid, 8.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 7713 mSDsCounter, 1092 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 5454 IncrementalHoareTripleChecker+Invalid, 6546 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1092 mSolverCounterUnsat, 1406 mSDtfsCounter, 5454 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2350 GetRequests, 1860 SyntacticMatches, 34 SemanticMatches, 456 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3201 ImplicationChecksByTransitivity, 11.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2147occurred in iteration=27, InterpolantAutomatonStates: 382, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 4.3s AutomataMinimizationTime, 28 MinimizatonAttempts, 1368 StatesRemovedByMinimization, 23 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 12.0s InterpolantComputationTime, 2751 NumberOfCodeBlocks, 2701 NumberOfCodeBlocksAsserted, 60 NumberOfCheckSat, 2475 ConstructedInterpolants, 17 QuantifiedInterpolants, 13383 SizeOfPredicates, 71 NumberOfNonLiveVariables, 3439 ConjunctsInSsa, 528 ConjunctsInUnsatCore, 48 InterpolantComputations, 12 PerfectInterpolantSequences, 2729/3310 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2024-11-08 14:26:09,830 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE