./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/hard2_valuebound2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a046e57d 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/hard2_valuebound2.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 39b9505d3a064a677b57bccb6de3a4c04e873275d34ee3c16e80371638b07149 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-mul-div-a046e57-m [2024-10-12 19:02:21,359 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-12 19:02:21,425 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-12 19:02:21,432 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-12 19:02:21,434 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-12 19:02:21,462 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-12 19:02:21,462 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-12 19:02:21,463 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-12 19:02:21,464 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-12 19:02:21,465 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-12 19:02:21,465 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-12 19:02:21,465 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-12 19:02:21,466 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-12 19:02:21,468 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-12 19:02:21,468 INFO L153 SettingsManager]: * Use SBE=true [2024-10-12 19:02:21,468 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-12 19:02:21,469 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-12 19:02:21,469 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-12 19:02:21,469 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-12 19:02:21,469 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-12 19:02:21,470 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-12 19:02:21,470 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-12 19:02:21,473 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-12 19:02:21,474 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-12 19:02:21,474 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-12 19:02:21,474 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-12 19:02:21,475 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-12 19:02:21,475 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-12 19:02:21,475 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-12 19:02:21,476 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-12 19:02:21,476 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-12 19:02:21,476 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-12 19:02:21,476 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-12 19:02:21,476 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-12 19:02:21,477 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-12 19:02:21,477 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-12 19:02:21,477 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-12 19:02:21,477 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-12 19:02:21,477 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-12 19:02:21,478 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-12 19:02:21,478 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-12 19:02:21,480 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-12 19:02:21,480 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 39b9505d3a064a677b57bccb6de3a4c04e873275d34ee3c16e80371638b07149 [2024-10-12 19:02:21,790 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-12 19:02:21,808 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-12 19:02:21,811 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-12 19:02:21,812 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-12 19:02:21,812 INFO L274 PluginConnector]: CDTParser initialized [2024-10-12 19:02:21,813 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard2_valuebound2.c [2024-10-12 19:02:23,171 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-12 19:02:23,343 INFO L384 CDTParser]: Found 1 translation units. [2024-10-12 19:02:23,344 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard2_valuebound2.c [2024-10-12 19:02:23,351 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/381e24e64/65952b4a99a347e88e27becb3ac0f28f/FLAG8f7eebe45 [2024-10-12 19:02:23,362 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/381e24e64/65952b4a99a347e88e27becb3ac0f28f [2024-10-12 19:02:23,364 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-12 19:02:23,365 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-12 19:02:23,367 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-12 19:02:23,367 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-12 19:02:23,371 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-12 19:02:23,372 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 07:02:23" (1/1) ... [2024-10-12 19:02:23,373 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d2e29ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:02:23, skipping insertion in model container [2024-10-12 19:02:23,373 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 07:02:23" (1/1) ... [2024-10-12 19:02:23,390 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-12 19:02:23,555 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/hard2_valuebound2.c[526,539] [2024-10-12 19:02:23,574 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-12 19:02:23,582 INFO L200 MainTranslator]: Completed pre-run [2024-10-12 19:02:23,592 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/hard2_valuebound2.c[526,539] [2024-10-12 19:02:23,602 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-12 19:02:23,616 INFO L204 MainTranslator]: Completed translation [2024-10-12 19:02:23,616 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:02:23 WrapperNode [2024-10-12 19:02:23,617 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-12 19:02:23,618 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-12 19:02:23,618 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-12 19:02:23,618 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-12 19:02:23,626 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:02:23" (1/1) ... [2024-10-12 19:02:23,634 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:02:23" (1/1) ... [2024-10-12 19:02:23,651 INFO L138 Inliner]: procedures = 14, calls = 23, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 64 [2024-10-12 19:02:23,652 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-12 19:02:23,652 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-12 19:02:23,652 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-12 19:02:23,653 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-12 19:02:23,663 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:02:23" (1/1) ... [2024-10-12 19:02:23,663 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:02:23" (1/1) ... [2024-10-12 19:02:23,666 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:02:23" (1/1) ... [2024-10-12 19:02:23,678 INFO L175 MemorySlicer]: Split 10 memory accesses to 2 slices as follows [2, 8]. 80 percent of accesses are in the largest equivalence class. The 10 initializations are split as follows [2, 8]. The 0 writes are split as follows [0, 0]. [2024-10-12 19:02:23,678 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:02:23" (1/1) ... [2024-10-12 19:02:23,678 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:02:23" (1/1) ... [2024-10-12 19:02:23,681 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:02:23" (1/1) ... [2024-10-12 19:02:23,684 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:02:23" (1/1) ... [2024-10-12 19:02:23,685 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:02:23" (1/1) ... [2024-10-12 19:02:23,686 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:02:23" (1/1) ... [2024-10-12 19:02:23,688 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-12 19:02:23,689 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-12 19:02:23,689 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-12 19:02:23,689 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-12 19:02:23,690 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:02:23" (1/1) ... [2024-10-12 19:02:23,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-12 19:02:23,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 19:02:23,724 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) [2024-10-12 19:02:23,730 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 [2024-10-12 19:02:23,776 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-12 19:02:23,776 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-12 19:02:23,777 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-12 19:02:23,777 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-12 19:02:23,777 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-12 19:02:23,777 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-10-12 19:02:23,777 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-10-12 19:02:23,864 INFO L238 CfgBuilder]: Building ICFG [2024-10-12 19:02:23,866 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-12 19:02:24,010 INFO L? ?]: Removed 7 outVars from TransFormulas that were not future-live. [2024-10-12 19:02:24,010 INFO L287 CfgBuilder]: Performing block encoding [2024-10-12 19:02:24,040 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-12 19:02:24,041 INFO L314 CfgBuilder]: Removed 2 assume(true) statements. [2024-10-12 19:02:24,041 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 07:02:24 BoogieIcfgContainer [2024-10-12 19:02:24,041 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-12 19:02:24,043 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-12 19:02:24,043 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-12 19:02:24,046 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-12 19:02:24,046 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 07:02:23" (1/3) ... [2024-10-12 19:02:24,047 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e8a33c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 07:02:24, skipping insertion in model container [2024-10-12 19:02:24,047 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:02:23" (2/3) ... [2024-10-12 19:02:24,047 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e8a33c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 07:02:24, skipping insertion in model container [2024-10-12 19:02:24,047 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 07:02:24" (3/3) ... [2024-10-12 19:02:24,048 INFO L112 eAbstractionObserver]: Analyzing ICFG hard2_valuebound2.c [2024-10-12 19:02:24,059 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-12 19:02:24,060 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-12 19:02:24,110 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-12 19:02:24,115 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;@6b98d9b9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-12 19:02:24,115 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-12 19:02:24,119 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-10-12 19:02:24,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-10-12 19:02:24,124 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 19:02:24,124 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 19:02:24,125 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 19:02:24,129 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 19:02:24,129 INFO L85 PathProgramCache]: Analyzing trace with hash -1830609328, now seen corresponding path program 1 times [2024-10-12 19:02:24,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 19:02:24,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550095035] [2024-10-12 19:02:24,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 19:02:24,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 19:02:24,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:02:24,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 19:02:24,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 19:02:24,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550095035] [2024-10-12 19:02:24,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550095035] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 19:02:24,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-12 19:02:24,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-12 19:02:24,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538578898] [2024-10-12 19:02:24,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 19:02:24,268 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-12 19:02:24,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 19:02:24,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-12 19:02:24,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-12 19:02:24,298 INFO L87 Difference]: Start difference. First operand has 23 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 19:02:24,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 19:02:24,325 INFO L93 Difference]: Finished difference Result 44 states and 78 transitions. [2024-10-12 19:02:24,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-12 19:02:24,329 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-10-12 19:02:24,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 19:02:24,333 INFO L225 Difference]: With dead ends: 44 [2024-10-12 19:02:24,333 INFO L226 Difference]: Without dead ends: 21 [2024-10-12 19:02:24,336 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-12 19:02:24,339 INFO L432 NwaCegarLoop]: 29 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, 29 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 [2024-10-12 19:02:24,339 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 29 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-12 19:02:24,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2024-10-12 19:02:24,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2024-10-12 19:02:24,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-10-12 19:02:24,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 29 transitions. [2024-10-12 19:02:24,368 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 29 transitions. Word has length 8 [2024-10-12 19:02:24,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 19:02:24,369 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 29 transitions. [2024-10-12 19:02:24,369 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 19:02:24,369 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 29 transitions. [2024-10-12 19:02:24,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-10-12 19:02:24,370 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 19:02:24,370 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 19:02:24,370 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-12 19:02:24,371 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 19:02:24,371 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 19:02:24,371 INFO L85 PathProgramCache]: Analyzing trace with hash -55601966, now seen corresponding path program 1 times [2024-10-12 19:02:24,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 19:02:24,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958016190] [2024-10-12 19:02:24,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 19:02:24,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 19:02:24,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:02:24,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 19:02:24,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 19:02:24,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958016190] [2024-10-12 19:02:24,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958016190] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 19:02:24,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-12 19:02:24,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-12 19:02:24,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521449751] [2024-10-12 19:02:24,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 19:02:24,562 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-12 19:02:24,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 19:02:24,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-12 19:02:24,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-12 19:02:24,566 INFO L87 Difference]: Start difference. First operand 21 states and 29 transitions. Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 19:02:24,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 19:02:24,640 INFO L93 Difference]: Finished difference Result 34 states and 46 transitions. [2024-10-12 19:02:24,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-12 19:02:24,640 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-10-12 19:02:24,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 19:02:24,641 INFO L225 Difference]: With dead ends: 34 [2024-10-12 19:02:24,642 INFO L226 Difference]: Without dead ends: 32 [2024-10-12 19:02:24,642 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-12 19:02:24,643 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 9 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-12 19:02:24,644 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 83 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-12 19:02:24,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-10-12 19:02:24,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 25. [2024-10-12 19:02:24,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-10-12 19:02:24,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2024-10-12 19:02:24,653 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 8 [2024-10-12 19:02:24,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 19:02:24,653 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2024-10-12 19:02:24,654 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 19:02:24,654 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2024-10-12 19:02:24,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-10-12 19:02:24,654 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 19:02:24,655 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 19:02:24,655 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-12 19:02:24,655 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 19:02:24,656 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 19:02:24,656 INFO L85 PathProgramCache]: Analyzing trace with hash -1587104181, now seen corresponding path program 1 times [2024-10-12 19:02:24,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 19:02:24,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361617019] [2024-10-12 19:02:24,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 19:02:24,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 19:02:24,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:02:24,790 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-10-12 19:02:24,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:02:24,798 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 19:02:24,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 19:02:24,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361617019] [2024-10-12 19:02:24,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361617019] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 19:02:24,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-12 19:02:24,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-12 19:02:24,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485180983] [2024-10-12 19:02:24,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 19:02:24,800 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-12 19:02:24,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 19:02:24,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-12 19:02:24,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-12 19:02:24,802 INFO L87 Difference]: Start difference. First operand 25 states and 32 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-12 19:02:24,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 19:02:24,866 INFO L93 Difference]: Finished difference Result 38 states and 49 transitions. [2024-10-12 19:02:24,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-12 19:02:24,867 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2024-10-12 19:02:24,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 19:02:24,869 INFO L225 Difference]: With dead ends: 38 [2024-10-12 19:02:24,869 INFO L226 Difference]: Without dead ends: 36 [2024-10-12 19:02:24,869 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-12 19:02:24,871 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 9 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-12 19:02:24,871 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 80 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-12 19:02:24,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2024-10-12 19:02:24,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 29. [2024-10-12 19:02:24,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-10-12 19:02:24,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2024-10-12 19:02:24,885 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 13 [2024-10-12 19:02:24,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 19:02:24,885 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2024-10-12 19:02:24,886 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-12 19:02:24,886 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2024-10-12 19:02:24,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-10-12 19:02:24,887 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 19:02:24,887 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 19:02:24,887 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-12 19:02:24,887 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 19:02:24,888 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 19:02:24,888 INFO L85 PathProgramCache]: Analyzing trace with hash 1972613170, now seen corresponding path program 1 times [2024-10-12 19:02:24,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 19:02:24,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59595221] [2024-10-12 19:02:24,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 19:02:24,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 19:02:24,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-12 19:02:24,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [61623902] [2024-10-12 19:02:24,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 19:02:24,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 19:02:24,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 19:02:24,922 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) [2024-10-12 19:02:24,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-12 19:02:24,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:02:24,992 INFO L255 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-12 19:02:24,996 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 19:02:25,136 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-12 19:02:25,136 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-12 19:02:25,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 19:02:25,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59595221] [2024-10-12 19:02:25,138 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-12 19:02:25,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61623902] [2024-10-12 19:02:25,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61623902] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 19:02:25,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-12 19:02:25,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-12 19:02:25,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638956683] [2024-10-12 19:02:25,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 19:02:25,140 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-12 19:02:25,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 19:02:25,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-12 19:02:25,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-12 19:02:25,141 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (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) [2024-10-12 19:02:25,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 19:02:25,216 INFO L93 Difference]: Finished difference Result 55 states and 72 transitions. [2024-10-12 19:02:25,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-12 19:02:25,217 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (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 18 [2024-10-12 19:02:25,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 19:02:25,218 INFO L225 Difference]: With dead ends: 55 [2024-10-12 19:02:25,220 INFO L226 Difference]: Without dead ends: 42 [2024-10-12 19:02:25,220 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-12 19:02:25,221 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 5 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-12 19:02:25,222 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 82 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-12 19:02:25,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-10-12 19:02:25,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2024-10-12 19:02:25,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 25 states have (on average 1.2) internal successors, (30), 26 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-10-12 19:02:25,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 53 transitions. [2024-10-12 19:02:25,238 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 53 transitions. Word has length 18 [2024-10-12 19:02:25,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 19:02:25,239 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 53 transitions. [2024-10-12 19:02:25,239 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (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) [2024-10-12 19:02:25,239 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 53 transitions. [2024-10-12 19:02:25,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-10-12 19:02:25,240 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 19:02:25,240 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 19:02:25,256 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-12 19:02:25,442 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 19:02:25,443 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 19:02:25,443 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 19:02:25,443 INFO L85 PathProgramCache]: Analyzing trace with hash -1810344840, now seen corresponding path program 1 times [2024-10-12 19:02:25,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 19:02:25,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081861393] [2024-10-12 19:02:25,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 19:02:25,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 19:02:25,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-12 19:02:25,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [140382368] [2024-10-12 19:02:25,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 19:02:25,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 19:02:25,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 19:02:25,480 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) [2024-10-12 19:02:25,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-12 19:02:25,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:02:25,536 INFO L255 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-10-12 19:02:25,538 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 19:02:25,640 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-12 19:02:25,641 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 19:02:25,891 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-12 19:02:25,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 19:02:25,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081861393] [2024-10-12 19:02:25,892 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-12 19:02:25,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140382368] [2024-10-12 19:02:25,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140382368] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 19:02:25,892 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-12 19:02:25,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2024-10-12 19:02:25,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905899885] [2024-10-12 19:02:25,893 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-12 19:02:25,893 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-12 19:02:25,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 19:02:25,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-12 19:02:25,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-10-12 19:02:25,894 INFO L87 Difference]: Start difference. First operand 42 states and 53 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-12 19:02:25,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 19:02:25,996 INFO L93 Difference]: Finished difference Result 55 states and 70 transitions. [2024-10-12 19:02:25,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-12 19:02:25,997 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 25 [2024-10-12 19:02:25,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 19:02:25,999 INFO L225 Difference]: With dead ends: 55 [2024-10-12 19:02:26,000 INFO L226 Difference]: Without dead ends: 53 [2024-10-12 19:02:26,001 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-10-12 19:02:26,002 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 12 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-12 19:02:26,003 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 74 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-12 19:02:26,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-10-12 19:02:26,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2024-10-12 19:02:26,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 33 states have internal predecessors, (38), 15 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2024-10-12 19:02:26,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 67 transitions. [2024-10-12 19:02:26,016 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 67 transitions. Word has length 25 [2024-10-12 19:02:26,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 19:02:26,017 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 67 transitions. [2024-10-12 19:02:26,017 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-12 19:02:26,017 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 67 transitions. [2024-10-12 19:02:26,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-10-12 19:02:26,018 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 19:02:26,018 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 19:02:26,038 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-12 19:02:26,218 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 19:02:26,219 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 19:02:26,219 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 19:02:26,219 INFO L85 PathProgramCache]: Analyzing trace with hash -447891575, now seen corresponding path program 1 times [2024-10-12 19:02:26,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 19:02:26,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524343441] [2024-10-12 19:02:26,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 19:02:26,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 19:02:26,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-12 19:02:26,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [579473348] [2024-10-12 19:02:26,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 19:02:26,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 19:02:26,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 19:02:26,256 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) [2024-10-12 19:02:26,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-12 19:02:26,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:02:26,303 INFO L255 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-10-12 19:02:26,305 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 19:02:26,408 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-10-12 19:02:26,409 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 19:02:26,495 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-10-12 19:02:26,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 19:02:26,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524343441] [2024-10-12 19:02:26,497 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-12 19:02:26,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579473348] [2024-10-12 19:02:26,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579473348] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-12 19:02:26,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-12 19:02:26,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2024-10-12 19:02:26,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842738885] [2024-10-12 19:02:26,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 19:02:26,500 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-12 19:02:26,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 19:02:26,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-12 19:02:26,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-10-12 19:02:26,500 INFO L87 Difference]: Start difference. First operand 52 states and 67 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-12 19:02:27,692 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-10-12 19:02:27,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 19:02:27,700 INFO L93 Difference]: Finished difference Result 62 states and 79 transitions. [2024-10-12 19:02:27,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-12 19:02:27,701 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 35 [2024-10-12 19:02:27,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 19:02:27,703 INFO L225 Difference]: With dead ends: 62 [2024-10-12 19:02:27,703 INFO L226 Difference]: Without dead ends: 60 [2024-10-12 19:02:27,704 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-10-12 19:02:27,705 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 5 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-10-12 19:02:27,705 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 75 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-10-12 19:02:27,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-10-12 19:02:27,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2024-10-12 19:02:27,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 35 states have (on average 1.2) internal successors, (42), 38 states have internal predecessors, (42), 17 states have call successors, (17), 6 states have call predecessors, (17), 6 states have return successors, (16), 14 states have call predecessors, (16), 16 states have call successors, (16) [2024-10-12 19:02:27,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 75 transitions. [2024-10-12 19:02:27,719 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 75 transitions. Word has length 35 [2024-10-12 19:02:27,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 19:02:27,719 INFO L471 AbstractCegarLoop]: Abstraction has 59 states and 75 transitions. [2024-10-12 19:02:27,719 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-12 19:02:27,719 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 75 transitions. [2024-10-12 19:02:27,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-10-12 19:02:27,720 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 19:02:27,721 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 19:02:27,738 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-12 19:02:27,921 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 19:02:27,922 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 19:02:27,922 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 19:02:27,922 INFO L85 PathProgramCache]: Analyzing trace with hash -1669992559, now seen corresponding path program 1 times [2024-10-12 19:02:27,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 19:02:27,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748208769] [2024-10-12 19:02:27,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 19:02:27,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 19:02:27,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:02:28,037 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-10-12 19:02:28,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:02:28,043 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-12 19:02:28,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:02:28,051 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-10-12 19:02:28,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:02:28,055 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-10-12 19:02:28,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:02:28,059 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-10-12 19:02:28,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:02:28,063 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-10-12 19:02:28,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:02:28,068 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-10-12 19:02:28,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 19:02:28,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748208769] [2024-10-12 19:02:28,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748208769] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 19:02:28,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-12 19:02:28,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-12 19:02:28,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45478196] [2024-10-12 19:02:28,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 19:02:28,070 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-12 19:02:28,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 19:02:28,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-12 19:02:28,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-12 19:02:28,071 INFO L87 Difference]: Start difference. First operand 59 states and 75 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-10-12 19:02:28,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 19:02:28,127 INFO L93 Difference]: Finished difference Result 67 states and 83 transitions. [2024-10-12 19:02:28,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-12 19:02:28,128 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 41 [2024-10-12 19:02:28,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 19:02:28,130 INFO L225 Difference]: With dead ends: 67 [2024-10-12 19:02:28,131 INFO L226 Difference]: Without dead ends: 55 [2024-10-12 19:02:28,132 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-12 19:02:28,132 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 3 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-12 19:02:28,133 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 92 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-12 19:02:28,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2024-10-12 19:02:28,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2024-10-12 19:02:28,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 36 states have internal predecessors, (39), 15 states have call successors, (15), 6 states have call predecessors, (15), 6 states have return successors, (14), 12 states have call predecessors, (14), 14 states have call successors, (14) [2024-10-12 19:02:28,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 68 transitions. [2024-10-12 19:02:28,152 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 68 transitions. Word has length 41 [2024-10-12 19:02:28,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 19:02:28,152 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 68 transitions. [2024-10-12 19:02:28,152 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-10-12 19:02:28,152 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 68 transitions. [2024-10-12 19:02:28,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-10-12 19:02:28,153 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 19:02:28,154 INFO L215 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 19:02:28,154 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-10-12 19:02:28,154 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 19:02:28,155 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 19:02:28,156 INFO L85 PathProgramCache]: Analyzing trace with hash -1460518785, now seen corresponding path program 1 times [2024-10-12 19:02:28,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 19:02:28,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22469547] [2024-10-12 19:02:28,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 19:02:28,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 19:02:28,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-12 19:02:28,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1149631776] [2024-10-12 19:02:28,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 19:02:28,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 19:02:28,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 19:02:28,205 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) [2024-10-12 19:02:28,206 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-12 19:02:28,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:02:28,266 INFO L255 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-10-12 19:02:28,268 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 19:02:28,631 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 18 proven. 26 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2024-10-12 19:02:28,633 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 19:02:30,179 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 18 proven. 26 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2024-10-12 19:02:30,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 19:02:30,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22469547] [2024-10-12 19:02:30,180 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-12 19:02:30,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149631776] [2024-10-12 19:02:30,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149631776] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 19:02:30,180 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-12 19:02:30,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2024-10-12 19:02:30,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117946979] [2024-10-12 19:02:30,181 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-12 19:02:30,182 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-12 19:02:30,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 19:02:30,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-12 19:02:30,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2024-10-12 19:02:30,184 INFO L87 Difference]: Start difference. First operand 55 states and 68 transitions. Second operand has 15 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 7 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2024-10-12 19:02:30,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 19:02:30,797 INFO L93 Difference]: Finished difference Result 130 states and 175 transitions. [2024-10-12 19:02:30,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-12 19:02:30,798 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 7 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) Word has length 55 [2024-10-12 19:02:30,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 19:02:30,799 INFO L225 Difference]: With dead ends: 130 [2024-10-12 19:02:30,800 INFO L226 Difference]: Without dead ends: 107 [2024-10-12 19:02:30,800 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2024-10-12 19:02:30,801 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 34 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-12 19:02:30,801 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 129 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-12 19:02:30,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2024-10-12 19:02:30,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 105. [2024-10-12 19:02:30,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 63 states have (on average 1.2222222222222223) internal successors, (77), 68 states have internal predecessors, (77), 31 states have call successors, (31), 10 states have call predecessors, (31), 10 states have return successors, (30), 26 states have call predecessors, (30), 30 states have call successors, (30) [2024-10-12 19:02:30,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 138 transitions. [2024-10-12 19:02:30,838 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 138 transitions. Word has length 55 [2024-10-12 19:02:30,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 19:02:30,838 INFO L471 AbstractCegarLoop]: Abstraction has 105 states and 138 transitions. [2024-10-12 19:02:30,839 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 7 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2024-10-12 19:02:30,839 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 138 transitions. [2024-10-12 19:02:30,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-10-12 19:02:30,842 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 19:02:30,842 INFO L215 NwaCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 19:02:30,860 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-12 19:02:31,046 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 19:02:31,047 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 19:02:31,047 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 19:02:31,048 INFO L85 PathProgramCache]: Analyzing trace with hash -814878683, now seen corresponding path program 1 times [2024-10-12 19:02:31,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 19:02:31,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111392217] [2024-10-12 19:02:31,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 19:02:31,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 19:02:31,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-12 19:02:31,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [629068692] [2024-10-12 19:02:31,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 19:02:31,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 19:02:31,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 19:02:31,105 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) [2024-10-12 19:02:31,106 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-12 19:02:31,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:02:31,164 INFO L255 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-10-12 19:02:31,167 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 19:02:31,475 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 22 proven. 34 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2024-10-12 19:02:31,475 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 19:02:32,123 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 22 proven. 34 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2024-10-12 19:02:32,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 19:02:32,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111392217] [2024-10-12 19:02:32,123 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-12 19:02:32,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629068692] [2024-10-12 19:02:32,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629068692] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 19:02:32,123 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-12 19:02:32,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2024-10-12 19:02:32,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346276397] [2024-10-12 19:02:32,124 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-12 19:02:32,124 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-12 19:02:32,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 19:02:32,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-12 19:02:32,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2024-10-12 19:02:32,127 INFO L87 Difference]: Start difference. First operand 105 states and 138 transitions. Second operand has 20 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 11 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 9 states have call predecessors, (20), 9 states have call successors, (20) [2024-10-12 19:02:32,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 19:02:32,760 INFO L93 Difference]: Finished difference Result 170 states and 224 transitions. [2024-10-12 19:02:32,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-10-12 19:02:32,761 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 11 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 9 states have call predecessors, (20), 9 states have call successors, (20) Word has length 66 [2024-10-12 19:02:32,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 19:02:32,764 INFO L225 Difference]: With dead ends: 170 [2024-10-12 19:02:32,766 INFO L226 Difference]: Without dead ends: 125 [2024-10-12 19:02:32,767 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=120, Invalid=386, Unknown=0, NotChecked=0, Total=506 [2024-10-12 19:02:32,768 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 14 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-12 19:02:32,769 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 178 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-12 19:02:32,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2024-10-12 19:02:32,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 100. [2024-10-12 19:02:32,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 61 states have (on average 1.1639344262295082) internal successors, (71), 65 states have internal predecessors, (71), 27 states have call successors, (27), 11 states have call predecessors, (27), 11 states have return successors, (26), 23 states have call predecessors, (26), 26 states have call successors, (26) [2024-10-12 19:02:32,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 124 transitions. [2024-10-12 19:02:32,814 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 124 transitions. Word has length 66 [2024-10-12 19:02:32,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 19:02:32,814 INFO L471 AbstractCegarLoop]: Abstraction has 100 states and 124 transitions. [2024-10-12 19:02:32,815 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 11 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 9 states have call predecessors, (20), 9 states have call successors, (20) [2024-10-12 19:02:32,815 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 124 transitions. [2024-10-12 19:02:32,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-10-12 19:02:32,819 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 19:02:32,819 INFO L215 NwaCegarLoop]: trace histogram [12, 11, 11, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 19:02:32,839 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-12 19:02:33,019 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 19:02:33,020 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 19:02:33,020 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 19:02:33,021 INFO L85 PathProgramCache]: Analyzing trace with hash -1399001704, now seen corresponding path program 1 times [2024-10-12 19:02:33,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 19:02:33,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694118876] [2024-10-12 19:02:33,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 19:02:33,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 19:02:33,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:02:33,394 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-10-12 19:02:33,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:02:33,398 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-12 19:02:33,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:02:33,402 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-10-12 19:02:33,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:02:33,405 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-10-12 19:02:33,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:02:33,414 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-10-12 19:02:33,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:02:33,423 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-10-12 19:02:33,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:02:33,432 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-10-12 19:02:33,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:02:33,436 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-10-12 19:02:33,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:02:33,444 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-10-12 19:02:33,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:02:33,449 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2024-10-12 19:02:33,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:02:33,452 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-10-12 19:02:33,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:02:33,455 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-10-12 19:02:33,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 19:02:33,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694118876] [2024-10-12 19:02:33,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694118876] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 19:02:33,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739336258] [2024-10-12 19:02:33,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 19:02:33,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 19:02:33,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 19:02:33,458 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 19:02:33,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-12 19:02:33,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:02:33,518 INFO L255 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-10-12 19:02:33,520 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 19:02:33,686 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-10-12 19:02:33,687 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 19:02:34,056 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-10-12 19:02:34,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739336258] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 19:02:34,056 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 19:02:34,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2024-10-12 19:02:34,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407350494] [2024-10-12 19:02:34,057 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 19:02:34,057 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-12 19:02:34,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 19:02:34,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-12 19:02:34,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2024-10-12 19:02:34,058 INFO L87 Difference]: Start difference. First operand 100 states and 124 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 12 states have internal predecessors, (40), 8 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (32), 8 states have call predecessors, (32), 8 states have call successors, (32) [2024-10-12 19:02:34,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 19:02:34,245 INFO L93 Difference]: Finished difference Result 119 states and 143 transitions. [2024-10-12 19:02:34,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-12 19:02:34,246 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 12 states have internal predecessors, (40), 8 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (32), 8 states have call predecessors, (32), 8 states have call successors, (32) Word has length 71 [2024-10-12 19:02:34,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 19:02:34,247 INFO L225 Difference]: With dead ends: 119 [2024-10-12 19:02:34,247 INFO L226 Difference]: Without dead ends: 92 [2024-10-12 19:02:34,248 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 156 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2024-10-12 19:02:34,248 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 8 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-12 19:02:34,248 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 187 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-12 19:02:34,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2024-10-12 19:02:34,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2024-10-12 19:02:34,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 57 states have (on average 1.1228070175438596) internal successors, (64), 60 states have internal predecessors, (64), 23 states have call successors, (23), 11 states have call predecessors, (23), 11 states have return successors, (22), 20 states have call predecessors, (22), 22 states have call successors, (22) [2024-10-12 19:02:34,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 109 transitions. [2024-10-12 19:02:34,282 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 109 transitions. Word has length 71 [2024-10-12 19:02:34,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 19:02:34,282 INFO L471 AbstractCegarLoop]: Abstraction has 92 states and 109 transitions. [2024-10-12 19:02:34,282 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 12 states have internal predecessors, (40), 8 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (32), 8 states have call predecessors, (32), 8 states have call successors, (32) [2024-10-12 19:02:34,282 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 109 transitions. [2024-10-12 19:02:34,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2024-10-12 19:02:34,283 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 19:02:34,284 INFO L215 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 19:02:34,300 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-12 19:02:34,487 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 19:02:34,488 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 19:02:34,488 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 19:02:34,488 INFO L85 PathProgramCache]: Analyzing trace with hash -2065528550, now seen corresponding path program 1 times [2024-10-12 19:02:34,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 19:02:34,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932256887] [2024-10-12 19:02:34,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 19:02:34,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 19:02:34,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:02:34,646 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-10-12 19:02:34,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:02:34,650 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-12 19:02:34,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:02:34,654 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-10-12 19:02:34,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:02:34,657 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-10-12 19:02:34,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:02:34,662 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-10-12 19:02:34,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:02:34,666 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-10-12 19:02:34,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:02:34,669 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-10-12 19:02:34,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:02:34,673 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-10-12 19:02:34,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:02:34,682 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2024-10-12 19:02:34,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:02:34,687 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-10-12 19:02:34,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:02:34,698 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2024-10-12 19:02:34,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:02:34,703 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2024-10-12 19:02:34,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:02:34,709 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2024-10-12 19:02:34,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:02:34,713 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 38 proven. 10 refuted. 0 times theorem prover too weak. 314 trivial. 0 not checked. [2024-10-12 19:02:34,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 19:02:34,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932256887] [2024-10-12 19:02:34,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932256887] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 19:02:34,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410596647] [2024-10-12 19:02:34,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 19:02:34,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 19:02:34,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 19:02:34,715 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 19:02:34,717 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-12 19:02:34,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:02:34,779 INFO L255 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-12 19:02:34,781 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 19:02:34,923 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 132 proven. 0 refuted. 0 times theorem prover too weak. 230 trivial. 0 not checked. [2024-10-12 19:02:34,924 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-12 19:02:34,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410596647] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 19:02:34,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-12 19:02:34,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 9 [2024-10-12 19:02:34,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685690006] [2024-10-12 19:02:34,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 19:02:34,925 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-12 19:02:34,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 19:02:34,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-12 19:02:34,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-10-12 19:02:34,926 INFO L87 Difference]: Start difference. First operand 92 states and 109 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2024-10-12 19:02:35,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 19:02:35,037 INFO L93 Difference]: Finished difference Result 124 states and 150 transitions. [2024-10-12 19:02:35,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-12 19:02:35,038 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 85 [2024-10-12 19:02:35,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 19:02:35,039 INFO L225 Difference]: With dead ends: 124 [2024-10-12 19:02:35,042 INFO L226 Difference]: Without dead ends: 87 [2024-10-12 19:02:35,042 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-10-12 19:02:35,043 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 8 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-12 19:02:35,043 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 92 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-12 19:02:35,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2024-10-12 19:02:35,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 78. [2024-10-12 19:02:35,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 51 states have internal predecessors, (53), 18 states have call successors, (18), 10 states have call predecessors, (18), 10 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2024-10-12 19:02:35,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 88 transitions. [2024-10-12 19:02:35,061 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 88 transitions. Word has length 85 [2024-10-12 19:02:35,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 19:02:35,061 INFO L471 AbstractCegarLoop]: Abstraction has 78 states and 88 transitions. [2024-10-12 19:02:35,061 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2024-10-12 19:02:35,062 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 88 transitions. [2024-10-12 19:02:35,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2024-10-12 19:02:35,062 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 19:02:35,063 INFO L215 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-10-12 19:02:35,080 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-12 19:02:35,266 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 19:02:35,267 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 19:02:35,267 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 19:02:35,267 INFO L85 PathProgramCache]: Analyzing trace with hash -376584808, now seen corresponding path program 2 times [2024-10-12 19:02:35,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 19:02:35,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990959801] [2024-10-12 19:02:35,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 19:02:35,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 19:02:35,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:02:35,683 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-10-12 19:02:35,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:02:35,689 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-12 19:02:35,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:02:35,694 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-10-12 19:02:35,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:02:35,699 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-10-12 19:02:35,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:02:35,703 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-10-12 19:02:35,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:02:35,708 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-10-12 19:02:35,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:02:35,713 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-10-12 19:02:35,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:02:35,721 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-10-12 19:02:35,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:02:35,725 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2024-10-12 19:02:35,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:02:35,730 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-10-12 19:02:35,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:02:35,735 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2024-10-12 19:02:35,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:02:35,739 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2024-10-12 19:02:35,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:02:35,744 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2024-10-12 19:02:35,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:02:35,752 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 30 proven. 20 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-10-12 19:02:35,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 19:02:35,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990959801] [2024-10-12 19:02:35,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990959801] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 19:02:35,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276955722] [2024-10-12 19:02:35,753 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-12 19:02:35,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 19:02:35,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 19:02:35,755 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 19:02:35,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-12 19:02:35,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-12 19:02:35,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 19:02:35,816 INFO L255 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-10-12 19:02:35,818 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 19:02:36,050 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 30 proven. 20 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-10-12 19:02:36,051 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 19:02:36,879 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 30 proven. 20 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-10-12 19:02:36,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276955722] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 19:02:36,880 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 19:02:36,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 24 [2024-10-12 19:02:36,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463627491] [2024-10-12 19:02:36,880 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 19:02:36,881 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-10-12 19:02:36,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 19:02:36,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-10-12 19:02:36,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2024-10-12 19:02:36,882 INFO L87 Difference]: Start difference. First operand 78 states and 88 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 13 states have call successors, (40), 2 states have call predecessors, (40), 1 states have return successors, (39), 12 states have call predecessors, (39), 12 states have call successors, (39) [2024-10-12 19:02:37,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 19:02:37,157 INFO L93 Difference]: Finished difference Result 125 states and 142 transitions. [2024-10-12 19:02:37,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-12 19:02:37,157 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 13 states have call successors, (40), 2 states have call predecessors, (40), 1 states have return successors, (39), 12 states have call predecessors, (39), 12 states have call successors, (39) Word has length 85 [2024-10-12 19:02:37,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 19:02:37,158 INFO L225 Difference]: With dead ends: 125 [2024-10-12 19:02:37,158 INFO L226 Difference]: Without dead ends: 76 [2024-10-12 19:02:37,159 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 180 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=195, Invalid=675, Unknown=0, NotChecked=0, Total=870 [2024-10-12 19:02:37,160 INFO L432 NwaCegarLoop]: 44 mSDtfsCounter, 18 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-12 19:02:37,160 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 392 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-12 19:02:37,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2024-10-12 19:02:37,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2024-10-12 19:02:37,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 48 states have (on average 1.0208333333333333) internal successors, (49), 49 states have internal predecessors, (49), 17 states have call successors, (17), 10 states have call predecessors, (17), 10 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2024-10-12 19:02:37,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 82 transitions. [2024-10-12 19:02:37,183 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 82 transitions. Word has length 85 [2024-10-12 19:02:37,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 19:02:37,183 INFO L471 AbstractCegarLoop]: Abstraction has 76 states and 82 transitions. [2024-10-12 19:02:37,183 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 13 states have call successors, (40), 2 states have call predecessors, (40), 1 states have return successors, (39), 12 states have call predecessors, (39), 12 states have call successors, (39) [2024-10-12 19:02:37,184 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 82 transitions. [2024-10-12 19:02:37,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2024-10-12 19:02:37,184 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 19:02:37,184 INFO L215 NwaCegarLoop]: trace histogram [15, 14, 14, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 19:02:37,202 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-10-12 19:02:37,388 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-10-12 19:02:37,389 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 19:02:37,389 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 19:02:37,389 INFO L85 PathProgramCache]: Analyzing trace with hash 1944501767, now seen corresponding path program 2 times [2024-10-12 19:02:37,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 19:02:37,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523669732] [2024-10-12 19:02:37,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 19:02:37,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 19:02:37,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-12 19:02:37,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [626209113] [2024-10-12 19:02:37,418 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-12 19:02:37,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 19:02:37,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 19:02:37,420 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 19:02:37,421 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-12 19:02:37,482 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-12 19:02:37,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 19:02:37,484 INFO L255 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-10-12 19:02:37,486 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 19:02:37,743 INFO L134 CoverageAnalysis]: Checked inductivity of 418 backedges. 48 proven. 45 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2024-10-12 19:02:37,744 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 19:03:00,884 INFO L134 CoverageAnalysis]: Checked inductivity of 418 backedges. 48 proven. 45 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2024-10-12 19:03:00,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 19:03:00,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523669732] [2024-10-12 19:03:00,885 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-12 19:03:00,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626209113] [2024-10-12 19:03:00,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626209113] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 19:03:00,885 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-12 19:03:00,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2024-10-12 19:03:00,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476442549] [2024-10-12 19:03:00,886 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-12 19:03:00,886 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-12 19:03:00,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 19:03:00,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-12 19:03:00,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2024-10-12 19:03:00,887 INFO L87 Difference]: Start difference. First operand 76 states and 82 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 12 states have call successors, (30), 3 states have call predecessors, (30), 2 states have return successors, (28), 12 states have call predecessors, (28), 12 states have call successors, (28) [2024-10-12 19:03:01,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 19:03:01,259 INFO L93 Difference]: Finished difference Result 86 states and 90 transitions. [2024-10-12 19:03:01,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-12 19:03:01,259 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 12 states have call successors, (30), 3 states have call predecessors, (30), 2 states have return successors, (28), 12 states have call predecessors, (28), 12 states have call successors, (28) Word has length 90 [2024-10-12 19:03:01,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 19:03:01,260 INFO L225 Difference]: With dead ends: 86 [2024-10-12 19:03:01,260 INFO L226 Difference]: Without dead ends: 84 [2024-10-12 19:03:01,260 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2024-10-12 19:03:01,261 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 5 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-12 19:03:01,261 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 210 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-12 19:03:01,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2024-10-12 19:03:01,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2024-10-12 19:03:01,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 54 states have (on average 1.0185185185185186) internal successors, (55), 55 states have internal predecessors, (55), 17 states have call successors, (17), 12 states have call predecessors, (17), 12 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2024-10-12 19:03:01,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 88 transitions. [2024-10-12 19:03:01,274 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 88 transitions. Word has length 90 [2024-10-12 19:03:01,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 19:03:01,275 INFO L471 AbstractCegarLoop]: Abstraction has 84 states and 88 transitions. [2024-10-12 19:03:01,275 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 12 states have call successors, (30), 3 states have call predecessors, (30), 2 states have return successors, (28), 12 states have call predecessors, (28), 12 states have call successors, (28) [2024-10-12 19:03:01,275 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 88 transitions. [2024-10-12 19:03:01,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2024-10-12 19:03:01,275 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 19:03:01,275 INFO L215 NwaCegarLoop]: trace histogram [16, 15, 15, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 19:03:01,288 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-10-12 19:03:01,476 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-10-12 19:03:01,476 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 19:03:01,476 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 19:03:01,477 INFO L85 PathProgramCache]: Analyzing trace with hash 1552559470, now seen corresponding path program 1 times [2024-10-12 19:03:01,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 19:03:01,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367661924] [2024-10-12 19:03:01,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 19:03:01,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 19:03:01,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-12 19:03:01,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1318313891] [2024-10-12 19:03:01,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 19:03:01,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 19:03:01,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 19:03:01,508 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 19:03:01,510 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-12 19:03:01,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:03:01,576 INFO L255 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 46 conjuncts are in the unsatisfiable core [2024-10-12 19:03:01,579 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 19:03:01,897 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 32 proven. 68 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2024-10-12 19:03:01,897 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 19:03:02,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 19:03:02,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367661924] [2024-10-12 19:03:02,689 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-12 19:03:02,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318313891] [2024-10-12 19:03:02,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318313891] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 19:03:02,689 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-12 19:03:02,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2024-10-12 19:03:02,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734051713] [2024-10-12 19:03:02,689 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-12 19:03:02,690 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-12 19:03:02,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 19:03:02,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-12 19:03:02,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2024-10-12 19:03:02,691 INFO L87 Difference]: Start difference. First operand 84 states and 88 transitions. Second operand has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2024-10-12 19:03:02,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 19:03:02,909 INFO L93 Difference]: Finished difference Result 90 states and 93 transitions. [2024-10-12 19:03:02,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-12 19:03:02,910 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) Word has length 96 [2024-10-12 19:03:02,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 19:03:02,911 INFO L225 Difference]: With dead ends: 90 [2024-10-12 19:03:02,911 INFO L226 Difference]: Without dead ends: 86 [2024-10-12 19:03:02,911 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2024-10-12 19:03:02,912 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 3 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-12 19:03:02,912 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 283 Invalid, 380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 373 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-12 19:03:02,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2024-10-12 19:03:02,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2024-10-12 19:03:02,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 56 states have (on average 1.0) internal successors, (56), 56 states have internal predecessors, (56), 17 states have call successors, (17), 13 states have call predecessors, (17), 12 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2024-10-12 19:03:02,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 89 transitions. [2024-10-12 19:03:02,929 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 89 transitions. Word has length 96 [2024-10-12 19:03:02,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 19:03:02,930 INFO L471 AbstractCegarLoop]: Abstraction has 86 states and 89 transitions. [2024-10-12 19:03:02,930 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2024-10-12 19:03:02,930 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 89 transitions. [2024-10-12 19:03:02,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2024-10-12 19:03:02,931 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 19:03:02,931 INFO L215 NwaCegarLoop]: trace histogram [17, 16, 16, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 19:03:02,944 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-10-12 19:03:03,132 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-10-12 19:03:03,133 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 19:03:03,133 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 19:03:03,133 INFO L85 PathProgramCache]: Analyzing trace with hash -2060413457, now seen corresponding path program 1 times [2024-10-12 19:03:03,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 19:03:03,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098749650] [2024-10-12 19:03:03,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 19:03:03,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 19:03:03,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:03:03,480 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-10-12 19:03:03,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:03:03,483 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-12 19:03:03,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:03:03,486 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-10-12 19:03:03,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:03:03,490 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-10-12 19:03:03,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:03:03,493 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-10-12 19:03:03,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:03:03,496 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-10-12 19:03:03,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:03:03,501 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-10-12 19:03:03,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:03:03,504 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-10-12 19:03:03,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:03:03,509 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2024-10-12 19:03:03,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:03:03,514 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-10-12 19:03:03,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:03:03,519 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2024-10-12 19:03:03,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:03:03,529 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2024-10-12 19:03:03,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:03:03,533 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2024-10-12 19:03:03,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:03:03,537 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2024-10-12 19:03:03,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:03:03,540 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2024-10-12 19:03:03,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:03:03,543 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2024-10-12 19:03:03,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:03:03,546 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 32 proven. 28 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2024-10-12 19:03:03,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 19:03:03,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098749650] [2024-10-12 19:03:03,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098749650] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 19:03:03,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602989480] [2024-10-12 19:03:03,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 19:03:03,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 19:03:03,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 19:03:03,549 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 19:03:03,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-12 19:03:03,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 19:03:03,612 INFO L255 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-10-12 19:03:03,614 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 19:03:03,984 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 34 proven. 71 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2024-10-12 19:03:03,984 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 19:03:05,641 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 34 proven. 71 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2024-10-12 19:03:05,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602989480] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 19:03:05,641 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 19:03:05,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15, 14] total 30 [2024-10-12 19:03:05,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493645164] [2024-10-12 19:03:05,642 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 19:03:05,643 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-10-12 19:03:05,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 19:03:05,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-10-12 19:03:05,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=720, Unknown=0, NotChecked=0, Total=870 [2024-10-12 19:03:05,644 INFO L87 Difference]: Start difference. First operand 86 states and 89 transitions. Second operand has 30 states, 30 states have (on average 2.0) internal successors, (60), 27 states have internal predecessors, (60), 17 states have call successors, (49), 3 states have call predecessors, (49), 2 states have return successors, (47), 17 states have call predecessors, (47), 17 states have call successors, (47) [2024-10-12 19:03:05,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 19:03:05,908 INFO L93 Difference]: Finished difference Result 90 states and 92 transitions. [2024-10-12 19:03:05,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-12 19:03:05,909 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.0) internal successors, (60), 27 states have internal predecessors, (60), 17 states have call successors, (49), 3 states have call predecessors, (49), 2 states have return successors, (47), 17 states have call predecessors, (47), 17 states have call successors, (47) Word has length 101 [2024-10-12 19:03:05,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 19:03:05,909 INFO L225 Difference]: With dead ends: 90 [2024-10-12 19:03:05,909 INFO L226 Difference]: Without dead ends: 0 [2024-10-12 19:03:05,910 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=199, Invalid=923, Unknown=0, NotChecked=0, Total=1122 [2024-10-12 19:03:05,910 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 7 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-12 19:03:05,910 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 267 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 338 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-12 19:03:05,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-10-12 19:03:05,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-10-12 19:03:05,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 19:03:05,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-10-12 19:03:05,911 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 101 [2024-10-12 19:03:05,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 19:03:05,911 INFO L471 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-10-12 19:03:05,912 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.0) internal successors, (60), 27 states have internal predecessors, (60), 17 states have call successors, (49), 3 states have call predecessors, (49), 2 states have return successors, (47), 17 states have call predecessors, (47), 17 states have call successors, (47) [2024-10-12 19:03:05,912 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-10-12 19:03:05,912 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-10-12 19:03:05,917 INFO L782 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-10-12 19:03:05,936 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-10-12 19:03:06,122 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-10-12 19:03:06,125 INFO L407 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 19:03:06,127 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2024-10-12 19:03:06,636 INFO L165 ceAbstractionStarter]: Computing trace abstraction results [2024-10-12 19:03:06,657 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.10 07:03:06 BoogieIcfgContainer [2024-10-12 19:03:06,657 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-10-12 19:03:06,658 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-10-12 19:03:06,658 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-10-12 19:03:06,658 INFO L274 PluginConnector]: Witness Printer initialized [2024-10-12 19:03:06,659 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 07:02:24" (3/4) ... [2024-10-12 19:03:06,662 INFO L139 WitnessPrinter]: Generating witness for correct program [2024-10-12 19:03:06,665 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2024-10-12 19:03:06,669 INFO L904 BoogieBacktranslator]: Reduced CFG by removing 17 nodes and edges [2024-10-12 19:03:06,669 INFO L904 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2024-10-12 19:03:06,669 INFO L904 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2024-10-12 19:03:06,670 INFO L904 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2024-10-12 19:03:06,670 INFO L904 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2024-10-12 19:03:06,759 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2024-10-12 19:03:06,760 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.yml [2024-10-12 19:03:06,760 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-10-12 19:03:06,760 INFO L158 Benchmark]: Toolchain (without parser) took 43394.78ms. Allocated memory was 167.8MB in the beginning and 299.9MB in the end (delta: 132.1MB). Free memory was 124.7MB in the beginning and 153.1MB in the end (delta: -28.4MB). Peak memory consumption was 101.9MB. Max. memory is 16.1GB. [2024-10-12 19:03:06,760 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 94.4MB. Free memory is still 61.9MB. There was no memory consumed. Max. memory is 16.1GB. [2024-10-12 19:03:06,761 INFO L158 Benchmark]: CACSL2BoogieTranslator took 250.34ms. Allocated memory is still 167.8MB. Free memory was 124.4MB in the beginning and 112.1MB in the end (delta: 12.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-10-12 19:03:06,761 INFO L158 Benchmark]: Boogie Procedure Inliner took 34.07ms. Allocated memory is still 167.8MB. Free memory was 112.1MB in the beginning and 110.4MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. [2024-10-12 19:03:06,761 INFO L158 Benchmark]: Boogie Preprocessor took 35.85ms. Allocated memory is still 167.8MB. Free memory was 110.4MB in the beginning and 108.7MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-10-12 19:03:06,761 INFO L158 Benchmark]: RCFGBuilder took 352.72ms. Allocated memory is still 167.8MB. Free memory was 108.7MB in the beginning and 131.6MB in the end (delta: -22.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2024-10-12 19:03:06,761 INFO L158 Benchmark]: TraceAbstraction took 42614.37ms. Allocated memory was 167.8MB in the beginning and 299.9MB in the end (delta: 132.1MB). Free memory was 131.3MB in the beginning and 158.3MB in the end (delta: -27.0MB). Peak memory consumption was 108.2MB. Max. memory is 16.1GB. [2024-10-12 19:03:06,762 INFO L158 Benchmark]: Witness Printer took 101.89ms. Allocated memory is still 299.9MB. Free memory was 158.3MB in the beginning and 153.1MB in the end (delta: 5.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2024-10-12 19:03:06,763 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 94.4MB. Free memory is still 61.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 250.34ms. Allocated memory is still 167.8MB. Free memory was 124.4MB in the beginning and 112.1MB in the end (delta: 12.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 34.07ms. Allocated memory is still 167.8MB. Free memory was 112.1MB in the beginning and 110.4MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 35.85ms. Allocated memory is still 167.8MB. Free memory was 110.4MB in the beginning and 108.7MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 352.72ms. Allocated memory is still 167.8MB. Free memory was 108.7MB in the beginning and 131.6MB in the end (delta: -22.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 42614.37ms. Allocated memory was 167.8MB in the beginning and 299.9MB in the end (delta: 132.1MB). Free memory was 131.3MB in the beginning and 158.3MB in the end (delta: -27.0MB). Peak memory consumption was 108.2MB. Max. memory is 16.1GB. * Witness Printer took 101.89ms. Allocated memory is still 299.9MB. Free memory was 158.3MB in the beginning and 153.1MB in the end (delta: 5.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 17]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 23 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 42.0s, OverallIterations: 15, TraceHistogramMax: 17, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 4.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 182 SdHoareTripleChecker+Valid, 3.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 140 mSDsluCounter, 2253 SdHoareTripleChecker+Invalid, 3.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1848 mSDsCounter, 195 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2145 IncrementalHoareTripleChecker+Invalid, 2340 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 195 mSolverCounterUnsat, 405 mSDtfsCounter, 2145 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1467 GetRequests, 1271 SyntacticMatches, 6 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 811 ImplicationChecksByTransitivity, 6.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=105occurred in iteration=8, InterpolantAutomatonStates: 128, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 15 MinimizatonAttempts, 52 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 33.8s InterpolantComputationTime, 1524 NumberOfCodeBlocks, 1524 NumberOfCodeBlocksAsserted, 28 NumberOfCheckSat, 1640 ConstructedInterpolants, 0 QuantifiedInterpolants, 18501 SizeOfPredicates, 23 NumberOfNonLiveVariables, 1909 ConjunctsInSsa, 280 ConjunctsInUnsatCore, 27 InterpolantComputations, 7 PerfectInterpolantSequences, 5854/6411 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 44]: Loop Invariant Derived loop invariant: ((((((((((d == 1) && (p == 1)) && (q == 0)) && (A == r)) && (B == 1)) || ((((((2 == A) && (2 == p)) && (r == 0)) && (2 == q)) && (B == 1)) && (2 == d))) || ((((((d == 1) && (p == 1)) && (2 == A)) && (r == 0)) && (2 == q)) && (B == 1))) || ((((((p == 4) && (2 == A)) && (q == 0)) && (d == 4)) && (2 == r)) && (B == 1))) || ((((((2 == p) && (q == 0)) && (A == 1)) && (r == 1)) && (B == 1)) && (2 == d))) || ((((((d == 1) && (p == 1)) && (r == 0)) && (q == 1)) && (A == 1)) && (B == 1))) - InvariantResult [Line: 34]: Loop Invariant Derived loop invariant: (((((((((2 == p) && (q == 0)) && (A <= 2)) && (A == r)) && (1 <= r)) && (B == 1)) && (2 == d)) || (((((((d == 1) && (p == 1)) && (q == 0)) && (A <= 2)) && (A == r)) && (B == 1)) && (0 <= A))) || ((((((p == 4) && (q == 0)) && (A == r)) && (d == 4)) && (2 == r)) && (B == 1))) - ProcedureContractResult [Line: 14]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert. Requires: (cond != 0) Ensures: (cond != 0) RESULT: Ultimate proved your program to be correct! [2024-10-12 19:03:06,806 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE