./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_valuebound20.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 61a67961 Calling Ultimate with: /root/.sdkman/candidates/java/current/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 /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_valuebound20.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 ec2a850a3cd9252437037b0e2bf289d9622078bb11b0dcb40fb1cb3d7147f7c5 --- Real Ultimate output --- This is Ultimate 0.2.5-wip.fs.cvc5-61a6796-m [2024-10-14 02:13:38,570 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-14 02:13:38,648 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-14 02:13:38,668 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-14 02:13:38,669 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-14 02:13:38,696 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-14 02:13:38,697 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-14 02:13:38,697 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-14 02:13:38,699 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-14 02:13:38,702 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-14 02:13:38,703 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-14 02:13:38,703 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-14 02:13:38,704 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-14 02:13:38,704 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-14 02:13:38,705 INFO L153 SettingsManager]: * Use SBE=true [2024-10-14 02:13:38,705 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-14 02:13:38,706 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-14 02:13:38,707 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-14 02:13:38,707 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-14 02:13:38,707 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-14 02:13:38,708 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-14 02:13:38,708 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-14 02:13:38,708 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-14 02:13:38,709 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-14 02:13:38,710 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-14 02:13:38,710 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-14 02:13:38,710 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-14 02:13:38,711 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-14 02:13:38,711 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-14 02:13:38,711 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-14 02:13:38,712 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-14 02:13:38,712 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-14 02:13:38,712 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 02:13:38,712 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-14 02:13:38,713 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-14 02:13:38,713 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-14 02:13:38,713 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-14 02:13:38,713 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-14 02:13:38,714 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-14 02:13:38,714 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-14 02:13:38,714 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-14 02:13:38,716 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-14 02:13:38,716 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ec2a850a3cd9252437037b0e2bf289d9622078bb11b0dcb40fb1cb3d7147f7c5 [2024-10-14 02:13:38,974 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-14 02:13:38,997 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-14 02:13:38,999 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-14 02:13:39,000 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-14 02:13:39,002 INFO L274 PluginConnector]: CDTParser initialized [2024-10-14 02:13:39,003 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_valuebound20.c [2024-10-14 02:13:40,541 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-14 02:13:40,708 INFO L384 CDTParser]: Found 1 translation units. [2024-10-14 02:13:40,709 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_valuebound20.c [2024-10-14 02:13:40,716 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/47f728743/6a954c5112594c6d82690a8bc2b698d0/FLAGcbdffdd9c [2024-10-14 02:13:40,730 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/47f728743/6a954c5112594c6d82690a8bc2b698d0 [2024-10-14 02:13:40,732 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-14 02:13:40,733 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-14 02:13:40,735 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-14 02:13:40,735 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-14 02:13:40,740 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-14 02:13:40,741 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 02:13:40" (1/1) ... [2024-10-14 02:13:40,744 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2723d8e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:13:40, skipping insertion in model container [2024-10-14 02:13:40,744 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 02:13:40" (1/1) ... [2024-10-14 02:13:40,765 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-14 02:13:40,939 WARN L248 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/dijkstra-u_valuebound20.c[525,538] [2024-10-14 02:13:40,992 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 02:13:41,004 INFO L200 MainTranslator]: Completed pre-run [2024-10-14 02:13:41,017 WARN L248 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/dijkstra-u_valuebound20.c[525,538] [2024-10-14 02:13:41,039 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 02:13:41,066 INFO L204 MainTranslator]: Completed translation [2024-10-14 02:13:41,067 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:13:41 WrapperNode [2024-10-14 02:13:41,067 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-14 02:13:41,068 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-14 02:13:41,068 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-14 02:13:41,069 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-14 02:13:41,077 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:13:41" (1/1) ... [2024-10-14 02:13:41,086 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:13:41" (1/1) ... [2024-10-14 02:13:41,109 INFO L138 Inliner]: procedures = 14, calls = 18, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 53 [2024-10-14 02:13:41,111 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-14 02:13:41,112 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-14 02:13:41,112 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-14 02:13:41,113 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-14 02:13:41,124 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:13:41" (1/1) ... [2024-10-14 02:13:41,124 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:13:41" (1/1) ... [2024-10-14 02:13:41,125 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:13:41" (1/1) ... [2024-10-14 02:13:41,148 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]. [2024-10-14 02:13:41,149 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:13:41" (1/1) ... [2024-10-14 02:13:41,149 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:13:41" (1/1) ... [2024-10-14 02:13:41,152 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:13:41" (1/1) ... [2024-10-14 02:13:41,159 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:13:41" (1/1) ... [2024-10-14 02:13:41,160 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:13:41" (1/1) ... [2024-10-14 02:13:41,161 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:13:41" (1/1) ... [2024-10-14 02:13:41,163 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-14 02:13:41,164 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-14 02:13:41,164 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-14 02:13:41,164 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-14 02:13:41,165 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:13:41" (1/1) ... [2024-10-14 02:13:41,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 02:13:41,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 02:13:41,205 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) [2024-10-14 02:13:41,210 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 [2024-10-14 02:13:41,258 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-14 02:13:41,258 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-10-14 02:13:41,259 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-10-14 02:13:41,259 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-14 02:13:41,259 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-14 02:13:41,260 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-14 02:13:41,260 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-10-14 02:13:41,260 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-10-14 02:13:41,329 INFO L238 CfgBuilder]: Building ICFG [2024-10-14 02:13:41,333 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-14 02:13:41,607 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2024-10-14 02:13:41,608 INFO L287 CfgBuilder]: Performing block encoding [2024-10-14 02:13:41,635 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-14 02:13:41,636 INFO L314 CfgBuilder]: Removed 2 assume(true) statements. [2024-10-14 02:13:41,636 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 02:13:41 BoogieIcfgContainer [2024-10-14 02:13:41,637 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-14 02:13:41,639 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-14 02:13:41,640 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-14 02:13:41,643 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-14 02:13:41,644 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 02:13:40" (1/3) ... [2024-10-14 02:13:41,645 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71f8cb3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 02:13:41, skipping insertion in model container [2024-10-14 02:13:41,646 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:13:41" (2/3) ... [2024-10-14 02:13:41,646 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71f8cb3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 02:13:41, skipping insertion in model container [2024-10-14 02:13:41,646 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 02:13:41" (3/3) ... [2024-10-14 02:13:41,648 INFO L112 eAbstractionObserver]: Analyzing ICFG dijkstra-u_valuebound20.c [2024-10-14 02:13:41,665 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-14 02:13:41,666 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-14 02:13:41,735 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-14 02:13:41,744 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;@406d839f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-14 02:13:41,746 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-14 02:13:41,751 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 16 states have internal predecessors, (25), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-10-14 02:13:41,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-10-14 02:13:41,760 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 02:13:41,760 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 02:13:41,761 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 02:13:41,767 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 02:13:41,768 INFO L85 PathProgramCache]: Analyzing trace with hash -10312671, now seen corresponding path program 1 times [2024-10-14 02:13:41,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 02:13:41,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777894292] [2024-10-14 02:13:41,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:13:41,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 02:13:41,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:13:41,935 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 02:13:41,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:13:41,950 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-14 02:13:41,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:13:41,961 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-14 02:13:41,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 02:13:41,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777894292] [2024-10-14 02:13:41,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777894292] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 02:13:41,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 02:13:41,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 02:13:41,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983089643] [2024-10-14 02:13:41,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 02:13:41,991 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-14 02:13:41,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 02:13:42,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-14 02:13:42,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-14 02:13:42,026 INFO L87 Difference]: Start difference. First operand has 30 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 16 states have internal predecessors, (25), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 2 states, 2 states have (on average 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) [2024-10-14 02:13:42,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 02:13:42,073 INFO L93 Difference]: Finished difference Result 58 states and 102 transitions. [2024-10-14 02:13:42,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-14 02:13:42,076 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 [2024-10-14 02:13:42,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 02:13:42,082 INFO L225 Difference]: With dead ends: 58 [2024-10-14 02:13:42,082 INFO L226 Difference]: Without dead ends: 28 [2024-10-14 02:13:42,085 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 [2024-10-14 02:13:42,089 INFO L432 NwaCegarLoop]: 39 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-14 02:13:42,090 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 39 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-14 02:13:42,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2024-10-14 02:13:42,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2024-10-14 02:13:42,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 15 states have internal predecessors, (18), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-10-14 02:13:42,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 39 transitions. [2024-10-14 02:13:42,126 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 39 transitions. Word has length 18 [2024-10-14 02:13:42,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 02:13:42,126 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 39 transitions. [2024-10-14 02:13:42,127 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) [2024-10-14 02:13:42,127 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 39 transitions. [2024-10-14 02:13:42,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-10-14 02:13:42,129 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 02:13:42,129 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 02:13:42,129 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-14 02:13:42,130 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 02:13:42,130 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 02:13:42,131 INFO L85 PathProgramCache]: Analyzing trace with hash 763841584, now seen corresponding path program 1 times [2024-10-14 02:13:42,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 02:13:42,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583653259] [2024-10-14 02:13:42,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:13:42,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 02:13:42,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:13:42,696 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 02:13:42,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:13:42,703 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-14 02:13:42,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:13:42,709 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-14 02:13:42,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 02:13:42,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583653259] [2024-10-14 02:13:42,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583653259] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 02:13:42,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 02:13:42,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-14 02:13:42,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900829419] [2024-10-14 02:13:42,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 02:13:42,714 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-14 02:13:42,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 02:13:42,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-14 02:13:42,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-10-14 02:13:42,717 INFO L87 Difference]: Start difference. First operand 28 states and 39 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 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) [2024-10-14 02:13:44,073 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-10-14 02:13:48,155 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-10-14 02:13:48,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 02:13:48,157 INFO L93 Difference]: Finished difference Result 60 states and 88 transitions. [2024-10-14 02:13:48,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-14 02:13:48,169 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 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 [2024-10-14 02:13:48,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 02:13:48,171 INFO L225 Difference]: With dead ends: 60 [2024-10-14 02:13:48,171 INFO L226 Difference]: Without dead ends: 42 [2024-10-14 02:13:48,172 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-10-14 02:13:48,174 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 5 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 13 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2024-10-14 02:13:48,175 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 158 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 51 Invalid, 1 Unknown, 0 Unchecked, 5.4s Time] [2024-10-14 02:13:48,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-10-14 02:13:48,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2024-10-14 02:13:48,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 22 states have internal predecessors, (26), 17 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2024-10-14 02:13:48,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 59 transitions. [2024-10-14 02:13:48,195 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 59 transitions. Word has length 19 [2024-10-14 02:13:48,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 02:13:48,195 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 59 transitions. [2024-10-14 02:13:48,195 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 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) [2024-10-14 02:13:48,196 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 59 transitions. [2024-10-14 02:13:48,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-10-14 02:13:48,197 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 02:13:48,197 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 02:13:48,197 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-14 02:13:48,197 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 02:13:48,198 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 02:13:48,198 INFO L85 PathProgramCache]: Analyzing trace with hash -82339253, now seen corresponding path program 1 times [2024-10-14 02:13:48,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 02:13:48,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710214157] [2024-10-14 02:13:48,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:13:48,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 02:13:48,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:13:48,626 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 02:13:48,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:13:48,630 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-14 02:13:48,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:13:48,633 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-14 02:13:48,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 02:13:48,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710214157] [2024-10-14 02:13:48,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710214157] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 02:13:48,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901240580] [2024-10-14 02:13:48,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:13:48,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 02:13:48,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 02:13:48,639 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) [2024-10-14 02:13:48,641 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-14 02:13:48,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:13:48,697 INFO L255 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-14 02:13:48,702 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 02:13:48,901 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-14 02:13:48,901 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 02:13:49,116 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-14 02:13:49,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901240580] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 02:13:49,117 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 02:13:49,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-10-14 02:13:49,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512014604] [2024-10-14 02:13:49,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 02:13:49,117 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-14 02:13:49,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 02:13:49,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-14 02:13:49,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2024-10-14 02:13:49,119 INFO L87 Difference]: Start difference. First operand 42 states and 59 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 13 states have internal predecessors, (27), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-14 02:13:51,504 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-10-14 02:13:51,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 02:13:51,882 INFO L93 Difference]: Finished difference Result 111 states and 177 transitions. [2024-10-14 02:13:51,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-14 02:13:51,883 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 13 states have internal predecessors, (27), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 21 [2024-10-14 02:13:51,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 02:13:51,886 INFO L225 Difference]: With dead ends: 111 [2024-10-14 02:13:51,886 INFO L226 Difference]: Without dead ends: 93 [2024-10-14 02:13:51,887 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2024-10-14 02:13:51,888 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 30 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2024-10-14 02:13:51,888 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 252 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2024-10-14 02:13:51,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2024-10-14 02:13:51,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 61. [2024-10-14 02:13:51,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 34 states have internal predecessors, (38), 25 states have call successors, (25), 4 states have call predecessors, (25), 4 states have return successors, (24), 22 states have call predecessors, (24), 24 states have call successors, (24) [2024-10-14 02:13:51,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 87 transitions. [2024-10-14 02:13:51,908 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 87 transitions. Word has length 21 [2024-10-14 02:13:51,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 02:13:51,909 INFO L471 AbstractCegarLoop]: Abstraction has 61 states and 87 transitions. [2024-10-14 02:13:51,909 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 13 states have internal predecessors, (27), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-14 02:13:51,909 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 87 transitions. [2024-10-14 02:13:51,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-10-14 02:13:51,910 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 02:13:51,910 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] [2024-10-14 02:13:51,928 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-14 02:13:52,114 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 02:13:52,115 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 02:13:52,115 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 02:13:52,115 INFO L85 PathProgramCache]: Analyzing trace with hash -93184560, now seen corresponding path program 1 times [2024-10-14 02:13:52,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 02:13:52,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509141012] [2024-10-14 02:13:52,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:13:52,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 02:13:52,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-14 02:13:52,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1212194021] [2024-10-14 02:13:52,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:13:52,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 02:13:52,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 02:13:52,138 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) [2024-10-14 02:13:52,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-14 02:13:52,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:13:52,181 INFO L255 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-14 02:13:52,187 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 02:13:52,263 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-10-14 02:13:52,264 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 02:13:52,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 02:13:52,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509141012] [2024-10-14 02:13:52,265 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-14 02:13:52,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212194021] [2024-10-14 02:13:52,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212194021] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 02:13:52,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 02:13:52,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-14 02:13:52,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913548362] [2024-10-14 02:13:52,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 02:13:52,266 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-14 02:13:52,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 02:13:52,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-14 02:13:52,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-14 02:13:52,267 INFO L87 Difference]: Start difference. First operand 61 states and 87 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 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) [2024-10-14 02:13:52,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 02:13:52,458 INFO L93 Difference]: Finished difference Result 86 states and 123 transitions. [2024-10-14 02:13:52,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-14 02:13:52,459 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 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 29 [2024-10-14 02:13:52,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 02:13:52,460 INFO L225 Difference]: With dead ends: 86 [2024-10-14 02:13:52,461 INFO L226 Difference]: Without dead ends: 83 [2024-10-14 02:13:52,461 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-14 02:13:52,462 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 5 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-14 02:13:52,462 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 123 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-14 02:13:52,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2024-10-14 02:13:52,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2024-10-14 02:13:52,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 39 states have (on average 1.205128205128205) internal successors, (47), 41 states have internal predecessors, (47), 37 states have call successors, (37), 6 states have call predecessors, (37), 6 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2024-10-14 02:13:52,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 119 transitions. [2024-10-14 02:13:52,485 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 119 transitions. Word has length 29 [2024-10-14 02:13:52,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 02:13:52,485 INFO L471 AbstractCegarLoop]: Abstraction has 83 states and 119 transitions. [2024-10-14 02:13:52,485 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 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) [2024-10-14 02:13:52,486 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 119 transitions. [2024-10-14 02:13:52,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-10-14 02:13:52,487 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 02:13:52,488 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] [2024-10-14 02:13:52,504 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-14 02:13:52,688 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2024-10-14 02:13:52,689 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 02:13:52,689 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 02:13:52,689 INFO L85 PathProgramCache]: Analyzing trace with hash 471953405, now seen corresponding path program 1 times [2024-10-14 02:13:52,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 02:13:52,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103043138] [2024-10-14 02:13:52,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:13:52,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 02:13:52,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-14 02:13:52,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [411735849] [2024-10-14 02:13:52,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:13:52,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 02:13:52,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 02:13:52,713 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) [2024-10-14 02:13:52,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-14 02:13:52,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:13:52,800 INFO L255 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-10-14 02:13:52,802 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 02:13:52,921 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-14 02:13:52,921 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 02:13:55,143 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-14 02:13:55,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 02:13:55,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103043138] [2024-10-14 02:13:55,144 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-14 02:13:55,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411735849] [2024-10-14 02:13:55,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411735849] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 02:13:55,144 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 02:13:55,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2024-10-14 02:13:55,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960974650] [2024-10-14 02:13:55,144 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 02:13:55,145 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-14 02:13:55,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 02:13:55,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-14 02:13:55,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-10-14 02:13:55,146 INFO L87 Difference]: Start difference. First operand 83 states and 119 transitions. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-10-14 02:14:04,650 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-10-14 02:14:06,064 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-10-14 02:14:10,529 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-10-14 02:14:15,262 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-10-14 02:14:19,691 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.42s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-10-14 02:14:24,224 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.86s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-10-14 02:14:29,344 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-10-14 02:14:33,360 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-10-14 02:14:37,386 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-10-14 02:14:41,671 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-10-14 02:14:43,997 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-10-14 02:14:48,386 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-10-14 02:14:48,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 02:14:48,409 INFO L93 Difference]: Finished difference Result 152 states and 222 transitions. [2024-10-14 02:14:48,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-14 02:14:48,409 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 28 [2024-10-14 02:14:48,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 02:14:48,411 INFO L225 Difference]: With dead ends: 152 [2024-10-14 02:14:48,411 INFO L226 Difference]: Without dead ends: 128 [2024-10-14 02:14:48,412 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=38, Invalid=93, Unknown=1, NotChecked=0, Total=132 [2024-10-14 02:14:48,414 INFO L432 NwaCegarLoop]: 53 mSDtfsCounter, 19 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 61 mSolverCounterUnsat, 9 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 47.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 9 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 47.8s IncrementalHoareTripleChecker+Time [2024-10-14 02:14:48,415 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 312 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 205 Invalid, 9 Unknown, 0 Unchecked, 47.8s Time] [2024-10-14 02:14:48,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2024-10-14 02:14:48,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 122. [2024-10-14 02:14:48,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 57 states have (on average 1.1929824561403508) internal successors, (68), 60 states have internal predecessors, (68), 55 states have call successors, (55), 9 states have call predecessors, (55), 9 states have return successors, (53), 52 states have call predecessors, (53), 53 states have call successors, (53) [2024-10-14 02:14:48,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 176 transitions. [2024-10-14 02:14:48,454 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 176 transitions. Word has length 28 [2024-10-14 02:14:48,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 02:14:48,455 INFO L471 AbstractCegarLoop]: Abstraction has 122 states and 176 transitions. [2024-10-14 02:14:48,455 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-10-14 02:14:48,455 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 176 transitions. [2024-10-14 02:14:48,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-10-14 02:14:48,457 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 02:14:48,458 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 02:14:48,464 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-14 02:14:48,658 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 02:14:48,659 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 02:14:48,659 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 02:14:48,659 INFO L85 PathProgramCache]: Analyzing trace with hash -416609438, now seen corresponding path program 1 times [2024-10-14 02:14:48,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 02:14:48,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322782738] [2024-10-14 02:14:48,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:14:48,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 02:14:48,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-14 02:14:48,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [915494231] [2024-10-14 02:14:48,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:14:48,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 02:14:48,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 02:14:48,686 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) [2024-10-14 02:14:48,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-14 02:14:48,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:14:48,748 INFO L255 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-14 02:14:48,750 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 02:14:48,921 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-14 02:14:48,922 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 02:14:48,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 02:14:48,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322782738] [2024-10-14 02:14:48,923 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-14 02:14:48,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915494231] [2024-10-14 02:14:48,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915494231] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 02:14:48,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 02:14:48,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-10-14 02:14:48,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812506395] [2024-10-14 02:14:48,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 02:14:48,924 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-14 02:14:48,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 02:14:48,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-14 02:14:48,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-10-14 02:14:48,927 INFO L87 Difference]: Start difference. First operand 122 states and 176 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 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) [2024-10-14 02:14:49,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 02:14:49,847 INFO L93 Difference]: Finished difference Result 136 states and 187 transitions. [2024-10-14 02:14:49,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-14 02:14:49,848 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 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 [2024-10-14 02:14:49,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 02:14:49,851 INFO L225 Difference]: With dead ends: 136 [2024-10-14 02:14:49,851 INFO L226 Difference]: Without dead ends: 134 [2024-10-14 02:14:49,852 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-10-14 02:14:49,853 INFO L432 NwaCegarLoop]: 60 mSDtfsCounter, 9 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-10-14 02:14:49,854 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 205 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-10-14 02:14:49,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2024-10-14 02:14:49,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2024-10-14 02:14:49,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 66 states have (on average 1.1666666666666667) internal successors, (77), 69 states have internal predecessors, (77), 55 states have call successors, (55), 12 states have call predecessors, (55), 12 states have return successors, (53), 52 states have call predecessors, (53), 53 states have call successors, (53) [2024-10-14 02:14:49,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 185 transitions. [2024-10-14 02:14:49,897 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 185 transitions. Word has length 40 [2024-10-14 02:14:49,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 02:14:49,897 INFO L471 AbstractCegarLoop]: Abstraction has 134 states and 185 transitions. [2024-10-14 02:14:49,897 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 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) [2024-10-14 02:14:49,897 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 185 transitions. [2024-10-14 02:14:49,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-10-14 02:14:49,899 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 02:14:49,899 INFO L215 NwaCegarLoop]: trace histogram [8, 7, 7, 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] [2024-10-14 02:14:49,918 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-10-14 02:14:50,105 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 02:14:50,106 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 02:14:50,106 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 02:14:50,106 INFO L85 PathProgramCache]: Analyzing trace with hash -208842498, now seen corresponding path program 1 times [2024-10-14 02:14:50,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 02:14:50,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850282621] [2024-10-14 02:14:50,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:14:50,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 02:14:50,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-14 02:14:50,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1141612637] [2024-10-14 02:14:50,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:14:50,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 02:14:50,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 02:14:50,141 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) [2024-10-14 02:14:50,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-14 02:14:50,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:14:50,212 INFO L255 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-14 02:14:50,222 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 02:14:50,369 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 31 proven. 1 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-10-14 02:14:50,369 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 02:15:08,582 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 31 proven. 1 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-10-14 02:15:08,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 02:15:08,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850282621] [2024-10-14 02:15:08,583 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-14 02:15:08,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141612637] [2024-10-14 02:15:08,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141612637] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 02:15:08,584 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 02:15:08,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2024-10-14 02:15:08,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089793089] [2024-10-14 02:15:08,584 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 02:15:08,585 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-14 02:15:08,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 02:15:08,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-14 02:15:08,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=80, Unknown=1, NotChecked=0, Total=110 [2024-10-14 02:15:08,586 INFO L87 Difference]: Start difference. First operand 134 states and 185 transitions. Second operand has 11 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 3 states have call successors, (16) [2024-10-14 02:15:12,825 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-10-14 02:15:16,845 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-10-14 02:15:20,868 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers []