./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_valuebound50.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_valuebound50.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 7ab48dd793c80bfdca8b2cb012b1dd7cd8eda625223788e3f60486b3a2e166d4 --- Real Ultimate output --- This is Ultimate 0.2.5-wip.fs.cvc5-61a6796-m [2024-10-14 02:13:41,239 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-14 02:13:41,304 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-14 02:13:41,307 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-14 02:13:41,309 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-14 02:13:41,326 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-14 02:13:41,326 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-14 02:13:41,326 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-14 02:13:41,327 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-14 02:13:41,327 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-14 02:13:41,327 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-14 02:13:41,328 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-14 02:13:41,328 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-14 02:13:41,330 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-14 02:13:41,330 INFO L153 SettingsManager]: * Use SBE=true [2024-10-14 02:13:41,330 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-14 02:13:41,330 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-14 02:13:41,331 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-14 02:13:41,331 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-14 02:13:41,331 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-14 02:13:41,333 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-14 02:13:41,334 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-14 02:13:41,334 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-14 02:13:41,334 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-14 02:13:41,334 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-14 02:13:41,334 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-14 02:13:41,335 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-14 02:13:41,335 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-14 02:13:41,335 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-14 02:13:41,335 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-14 02:13:41,336 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-14 02:13:41,336 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-14 02:13:41,336 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 02:13:41,336 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-14 02:13:41,336 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-14 02:13:41,336 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-14 02:13:41,336 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-14 02:13:41,337 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-14 02:13:41,337 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-14 02:13:41,337 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-14 02:13:41,337 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-14 02:13:41,338 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-14 02:13:41,338 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7ab48dd793c80bfdca8b2cb012b1dd7cd8eda625223788e3f60486b3a2e166d4 [2024-10-14 02:13:41,548 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-14 02:13:41,567 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-14 02:13:41,569 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-14 02:13:41,570 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-14 02:13:41,570 INFO L274 PluginConnector]: CDTParser initialized [2024-10-14 02:13:41,571 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_valuebound50.c [2024-10-14 02:13:42,697 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-14 02:13:42,853 INFO L384 CDTParser]: Found 1 translation units. [2024-10-14 02:13:42,854 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_valuebound50.c [2024-10-14 02:13:42,860 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/db0a7ede7/6adc03bfe9d34fc1bbaaf31c1c459dbe/FLAGd488ae1c7 [2024-10-14 02:13:42,873 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/db0a7ede7/6adc03bfe9d34fc1bbaaf31c1c459dbe [2024-10-14 02:13:42,875 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-14 02:13:42,876 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-14 02:13:42,878 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-14 02:13:42,878 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-14 02:13:42,882 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-14 02:13:42,882 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 02:13:42" (1/1) ... [2024-10-14 02:13:42,884 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f10be72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:13:42, skipping insertion in model container [2024-10-14 02:13:42,885 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 02:13:42" (1/1) ... [2024-10-14 02:13:42,902 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-14 02:13:43,040 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_valuebound50.c[525,538] [2024-10-14 02:13:43,066 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 02:13:43,073 INFO L200 MainTranslator]: Completed pre-run [2024-10-14 02:13:43,084 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_valuebound50.c[525,538] [2024-10-14 02:13:43,099 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 02:13:43,122 INFO L204 MainTranslator]: Completed translation [2024-10-14 02:13:43,123 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:13:43 WrapperNode [2024-10-14 02:13:43,123 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-14 02:13:43,124 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-14 02:13:43,124 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-14 02:13:43,124 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-14 02:13:43,130 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:13:43" (1/1) ... [2024-10-14 02:13:43,135 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:13:43" (1/1) ... [2024-10-14 02:13:43,156 INFO L138 Inliner]: procedures = 14, calls = 18, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 53 [2024-10-14 02:13:43,159 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-14 02:13:43,159 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-14 02:13:43,159 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-14 02:13:43,159 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-14 02:13:43,168 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:13:43" (1/1) ... [2024-10-14 02:13:43,168 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:13:43" (1/1) ... [2024-10-14 02:13:43,174 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:13:43" (1/1) ... [2024-10-14 02:13:43,187 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 02:13:43,188 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:13:43" (1/1) ... [2024-10-14 02:13:43,188 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:13:43" (1/1) ... [2024-10-14 02:13:43,190 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:13:43" (1/1) ... [2024-10-14 02:13:43,195 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:13:43" (1/1) ... [2024-10-14 02:13:43,196 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:13:43" (1/1) ... [2024-10-14 02:13:43,199 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:13:43" (1/1) ... [2024-10-14 02:13:43,200 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-14 02:13:43,201 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-14 02:13:43,201 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-14 02:13:43,201 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-14 02:13:43,201 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:13:43" (1/1) ... [2024-10-14 02:13:43,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 02:13:43,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 02:13:43,230 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 02:13:43,232 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 02:13:43,265 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-14 02:13:43,265 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-10-14 02:13:43,266 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-10-14 02:13:43,266 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-14 02:13:43,266 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-14 02:13:43,266 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-14 02:13:43,266 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-10-14 02:13:43,266 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-10-14 02:13:43,315 INFO L238 CfgBuilder]: Building ICFG [2024-10-14 02:13:43,316 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-14 02:13:43,510 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2024-10-14 02:13:43,510 INFO L287 CfgBuilder]: Performing block encoding [2024-10-14 02:13:43,530 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-14 02:13:43,531 INFO L314 CfgBuilder]: Removed 2 assume(true) statements. [2024-10-14 02:13:43,532 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 02:13:43 BoogieIcfgContainer [2024-10-14 02:13:43,532 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-14 02:13:43,534 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-14 02:13:43,534 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-14 02:13:43,537 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-14 02:13:43,537 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 02:13:42" (1/3) ... [2024-10-14 02:13:43,538 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b14a94c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 02:13:43, skipping insertion in model container [2024-10-14 02:13:43,538 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:13:43" (2/3) ... [2024-10-14 02:13:43,538 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b14a94c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 02:13:43, skipping insertion in model container [2024-10-14 02:13:43,538 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 02:13:43" (3/3) ... [2024-10-14 02:13:43,539 INFO L112 eAbstractionObserver]: Analyzing ICFG dijkstra-u_valuebound50.c [2024-10-14 02:13:43,550 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-14 02:13:43,550 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-14 02:13:43,592 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-14 02:13:43,598 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;@58862f96, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-14 02:13:43,598 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-14 02:13:43,602 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 02:13:43,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-10-14 02:13:43,607 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 02:13:43,607 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 02:13:43,608 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 02:13:43,612 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 02:13:43,613 INFO L85 PathProgramCache]: Analyzing trace with hash -10312671, now seen corresponding path program 1 times [2024-10-14 02:13:43,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 02:13:43,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116625721] [2024-10-14 02:13:43,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:13:43,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 02:13:43,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:13:43,721 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 02:13:43,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:13:43,727 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-14 02:13:43,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:13:43,733 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 02:13:43,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 02:13:43,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116625721] [2024-10-14 02:13:43,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116625721] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 02:13:43,734 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 02:13:43,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 02:13:43,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005426107] [2024-10-14 02:13:43,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 02:13:43,739 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-14 02:13:43,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 02:13:43,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-14 02:13:43,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-14 02:13:43,754 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 02:13:43,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 02:13:43,776 INFO L93 Difference]: Finished difference Result 58 states and 102 transitions. [2024-10-14 02:13:43,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-14 02:13:43,778 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 02:13:43,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 02:13:43,782 INFO L225 Difference]: With dead ends: 58 [2024-10-14 02:13:43,782 INFO L226 Difference]: Without dead ends: 28 [2024-10-14 02:13:43,784 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 02:13:43,786 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 02:13:43,787 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 02:13:43,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2024-10-14 02:13:43,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2024-10-14 02:13:43,810 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 02:13:43,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 39 transitions. [2024-10-14 02:13:43,812 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 39 transitions. Word has length 18 [2024-10-14 02:13:43,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 02:13:43,813 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 39 transitions. [2024-10-14 02:13:43,813 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 02:13:43,813 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 39 transitions. [2024-10-14 02:13:43,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-10-14 02:13:43,814 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 02:13:43,814 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 02:13:43,814 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-14 02:13:43,814 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 02:13:43,815 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 02:13:43,815 INFO L85 PathProgramCache]: Analyzing trace with hash 763841584, now seen corresponding path program 1 times [2024-10-14 02:13:43,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 02:13:43,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104047202] [2024-10-14 02:13:43,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:13:43,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 02:13:43,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:13:44,243 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 02:13:44,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:13:44,248 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-14 02:13:44,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:13:44,255 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 02:13:44,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 02:13:44,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104047202] [2024-10-14 02:13:44,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104047202] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 02:13:44,255 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 02:13:44,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-14 02:13:44,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177295161] [2024-10-14 02:13:44,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 02:13:44,257 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-14 02:13:44,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 02:13:44,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-14 02:13:44,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-10-14 02:13:44,259 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 02:13:45,536 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-10-14 02:13:49,584 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 02:13:49,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 02:13:49,586 INFO L93 Difference]: Finished difference Result 60 states and 88 transitions. [2024-10-14 02:13:49,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-14 02:13:49,595 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 02:13:49,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 02:13:49,596 INFO L225 Difference]: With dead ends: 60 [2024-10-14 02:13:49,597 INFO L226 Difference]: Without dead ends: 42 [2024-10-14 02:13:49,597 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 02:13:49,598 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 5 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 13 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s 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, 5.3s IncrementalHoareTripleChecker+Time [2024-10-14 02:13:49,599 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 158 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 51 Invalid, 1 Unknown, 0 Unchecked, 5.3s Time] [2024-10-14 02:13:49,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-10-14 02:13:49,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2024-10-14 02:13:49,614 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 02:13:49,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 59 transitions. [2024-10-14 02:13:49,615 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 59 transitions. Word has length 19 [2024-10-14 02:13:49,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 02:13:49,616 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 59 transitions. [2024-10-14 02:13:49,616 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 02:13:49,616 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 59 transitions. [2024-10-14 02:13:49,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-10-14 02:13:49,616 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 02:13:49,617 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 02:13:49,617 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-14 02:13:49,617 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 02:13:49,617 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 02:13:49,617 INFO L85 PathProgramCache]: Analyzing trace with hash -82339253, now seen corresponding path program 1 times [2024-10-14 02:13:49,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 02:13:49,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817743623] [2024-10-14 02:13:49,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:13:49,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 02:13:49,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:13:49,932 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 02:13:49,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:13:49,936 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-14 02:13:49,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:13:49,939 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 02:13:49,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 02:13:49,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817743623] [2024-10-14 02:13:49,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817743623] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 02:13:49,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843113614] [2024-10-14 02:13:49,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:13:49,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 02:13:49,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 02:13:49,945 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 02:13:49,947 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 02:13:49,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:13:49,990 INFO L255 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-14 02:13:49,994 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 02:13:50,129 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 02:13:50,130 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 02:13:50,279 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 02:13:50,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843113614] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 02:13:50,279 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 02:13:50,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-10-14 02:13:50,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797196957] [2024-10-14 02:13:50,280 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 02:13:50,280 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-14 02:13:50,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 02:13:50,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-14 02:13:50,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2024-10-14 02:13:50,281 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 02:13:54,929 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-10-14 02:13:58,982 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-10-14 02:14:02,995 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-10-14 02:14:03,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 02:14:03,108 INFO L93 Difference]: Finished difference Result 111 states and 177 transitions. [2024-10-14 02:14:03,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-14 02:14:03,108 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 02:14:03,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 02:14:03,110 INFO L225 Difference]: With dead ends: 111 [2024-10-14 02:14:03,110 INFO L226 Difference]: Without dead ends: 93 [2024-10-14 02:14:03,111 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2024-10-14 02:14:03,112 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 30 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 116 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.7s IncrementalHoareTripleChecker+Time [2024-10-14 02:14:03,112 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 253 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 194 Invalid, 3 Unknown, 0 Unchecked, 12.7s Time] [2024-10-14 02:14:03,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2024-10-14 02:14:03,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 61. [2024-10-14 02:14:03,124 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 02:14:03,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 87 transitions. [2024-10-14 02:14:03,126 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 87 transitions. Word has length 21 [2024-10-14 02:14:03,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 02:14:03,126 INFO L471 AbstractCegarLoop]: Abstraction has 61 states and 87 transitions. [2024-10-14 02:14:03,126 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 02:14:03,126 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 87 transitions. [2024-10-14 02:14:03,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-10-14 02:14:03,127 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 02:14:03,128 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 02:14:03,143 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 02:14:03,331 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 02:14:03,332 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 02:14:03,332 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 02:14:03,332 INFO L85 PathProgramCache]: Analyzing trace with hash -93184560, now seen corresponding path program 1 times [2024-10-14 02:14:03,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 02:14:03,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125546742] [2024-10-14 02:14:03,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:14:03,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 02:14:03,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-14 02:14:03,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1059135746] [2024-10-14 02:14:03,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:14:03,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 02:14:03,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 02:14:03,358 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 02:14:03,365 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 02:14:03,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:14:03,402 INFO L255 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-14 02:14:03,403 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 02:14:03,456 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 02:14:03,456 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 02:14:03,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 02:14:03,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125546742] [2024-10-14 02:14:03,457 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-14 02:14:03,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059135746] [2024-10-14 02:14:03,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059135746] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 02:14:03,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 02:14:03,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-14 02:14:03,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032447249] [2024-10-14 02:14:03,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 02:14:03,457 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-14 02:14:03,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 02:14:03,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-14 02:14:03,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-14 02:14:03,458 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 02:14:03,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 02:14:03,526 INFO L93 Difference]: Finished difference Result 86 states and 123 transitions. [2024-10-14 02:14:03,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-14 02:14:03,527 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 02:14:03,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 02:14:03,528 INFO L225 Difference]: With dead ends: 86 [2024-10-14 02:14:03,529 INFO L226 Difference]: Without dead ends: 83 [2024-10-14 02:14:03,529 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 02:14:03,530 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 5 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 02:14:03,530 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 123 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 02:14:03,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2024-10-14 02:14:03,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2024-10-14 02:14:03,547 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 02:14:03,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 119 transitions. [2024-10-14 02:14:03,549 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 119 transitions. Word has length 29 [2024-10-14 02:14:03,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 02:14:03,550 INFO L471 AbstractCegarLoop]: Abstraction has 83 states and 119 transitions. [2024-10-14 02:14:03,550 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 02:14:03,551 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 119 transitions. [2024-10-14 02:14:03,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-10-14 02:14:03,552 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 02:14:03,552 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 02:14:03,564 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 02:14:03,752 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 02:14:03,753 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 02:14:03,753 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 02:14:03,753 INFO L85 PathProgramCache]: Analyzing trace with hash 471953405, now seen corresponding path program 1 times [2024-10-14 02:14:03,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 02:14:03,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868966225] [2024-10-14 02:14:03,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:14:03,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 02:14:03,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-14 02:14:03,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1278929063] [2024-10-14 02:14:03,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:14:03,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 02:14:03,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 02:14:03,767 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 02:14:03,768 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 02:14:03,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:14:03,832 INFO L255 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-10-14 02:14:03,833 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 02:14:03,926 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 02:14:03,927 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 02:14:04,384 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 02:14:04,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 02:14:04,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868966225] [2024-10-14 02:14:04,385 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-14 02:14:04,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278929063] [2024-10-14 02:14:04,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278929063] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 02:14:04,387 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 02:14:04,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2024-10-14 02:14:04,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609242237] [2024-10-14 02:14:04,388 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 02:14:04,388 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-14 02:14:04,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 02:14:04,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-14 02:14:04,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-10-14 02:14:04,389 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 02:14:15,091 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-10-14 02:14:16,398 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-10-14 02:14:21,137 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-10-14 02:14:25,910 WARN L539 Checker$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 02:14:31,667 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-10-14 02:14:35,912 WARN L539 Checker$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 02:14:39,947 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-10-14 02:14:43,952 WARN L539 Checker$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 02:14:47,956 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-10-14 02:14:52,005 WARN L539 Checker$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 02:14:56,023 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-10-14 02:15:00,044 WARN L539 Checker$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 02:15:04,050 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-10-14 02:15:08,913 WARN L539 Checker$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 02:15:15,929 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 6.70s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-10-14 02:15:15,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 02:15:15,936 INFO L93 Difference]: Finished difference Result 152 states and 222 transitions. [2024-10-14 02:15:15,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-14 02:15:15,937 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 02:15:15,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 02:15:15,938 INFO L225 Difference]: With dead ends: 152 [2024-10-14 02:15:15,938 INFO L226 Difference]: Without dead ends: 128 [2024-10-14 02:15:15,939 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2024-10-14 02:15:15,944 INFO L432 NwaCegarLoop]: 53 mSDtfsCounter, 19 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 61 mSolverCounterUnsat, 14 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 64.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 14 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 64.8s IncrementalHoareTripleChecker+Time [2024-10-14 02:15:15,945 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 312 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 205 Invalid, 14 Unknown, 0 Unchecked, 64.8s Time] [2024-10-14 02:15:15,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2024-10-14 02:15:15,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 122. [2024-10-14 02:15:15,972 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 02:15:15,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 176 transitions. [2024-10-14 02:15:15,976 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 176 transitions. Word has length 28 [2024-10-14 02:15:15,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 02:15:15,977 INFO L471 AbstractCegarLoop]: Abstraction has 122 states and 176 transitions. [2024-10-14 02:15:15,977 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 02:15:15,977 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 176 transitions. [2024-10-14 02:15:15,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-10-14 02:15:15,978 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 02:15:15,979 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 02:15:15,987 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 02:15:16,183 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 02:15:16,184 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 02:15:16,184 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 02:15:16,185 INFO L85 PathProgramCache]: Analyzing trace with hash -416609438, now seen corresponding path program 1 times [2024-10-14 02:15:16,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 02:15:16,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315956483] [2024-10-14 02:15:16,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:15:16,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 02:15:16,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-14 02:15:16,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1101673839] [2024-10-14 02:15:16,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:15:16,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 02:15:16,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 02:15:16,211 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 02:15:16,212 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 02:15:16,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:15:16,263 INFO L255 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-14 02:15:16,264 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 02:15:16,420 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 02:15:16,420 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 02:15:16,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 02:15:16,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315956483] [2024-10-14 02:15:16,421 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-14 02:15:16,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101673839] [2024-10-14 02:15:16,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101673839] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 02:15:16,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 02:15:16,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-10-14 02:15:16,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422349819] [2024-10-14 02:15:16,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 02:15:16,422 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-14 02:15:16,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 02:15:16,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-14 02:15:16,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-10-14 02:15:16,422 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 02:15:16,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 02:15:16,847 INFO L93 Difference]: Finished difference Result 136 states and 187 transitions. [2024-10-14 02:15:16,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-14 02:15:16,847 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 02:15:16,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 02:15:16,849 INFO L225 Difference]: With dead ends: 136 [2024-10-14 02:15:16,850 INFO L226 Difference]: Without dead ends: 134 [2024-10-14 02:15:16,850 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-10-14 02:15:16,850 INFO L432 NwaCegarLoop]: 60 mSDtfsCounter, 9 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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, 0.4s IncrementalHoareTripleChecker+Time [2024-10-14 02:15:16,850 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 205 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-14 02:15:16,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2024-10-14 02:15:16,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2024-10-14 02:15:16,868 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 02:15:16,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 185 transitions. [2024-10-14 02:15:16,869 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 185 transitions. Word has length 40 [2024-10-14 02:15:16,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 02:15:16,869 INFO L471 AbstractCegarLoop]: Abstraction has 134 states and 185 transitions. [2024-10-14 02:15:16,869 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 02:15:16,870 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 185 transitions. [2024-10-14 02:15:16,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-10-14 02:15:16,871 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 02:15:16,871 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 02:15:16,887 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-14 02:15:17,075 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 02:15:17,076 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 02:15:17,076 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 02:15:17,076 INFO L85 PathProgramCache]: Analyzing trace with hash -208842498, now seen corresponding path program 1 times [2024-10-14 02:15:17,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 02:15:17,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609906578] [2024-10-14 02:15:17,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:15:17,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 02:15:17,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-14 02:15:17,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1829441765] [2024-10-14 02:15:17,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:15:17,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 02:15:17,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 02:15:17,110 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 02:15:17,111 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 02:15:17,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:15:17,153 INFO L255 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-14 02:15:17,155 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 02:15:17,261 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 02:15:17,262 INFO L311 TraceCheckSpWp]: Computing backward predicates...