./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound50.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 023d838f Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound50.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 05dbf98a57cbdf117305bcdd9c3dde8d1b2284b890adec5d1f5924f0e5e4bbbb --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-023d838-m [2024-11-09 22:36:47,621 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 22:36:47,695 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-09 22:36:47,702 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 22:36:47,704 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 22:36:47,738 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 22:36:47,740 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 22:36:47,741 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 22:36:47,741 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-09 22:36:47,743 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-09 22:36:47,744 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 22:36:47,744 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 22:36:47,745 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-09 22:36:47,747 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-09 22:36:47,747 INFO L153 SettingsManager]: * Use SBE=true [2024-11-09 22:36:47,747 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 22:36:47,748 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-09 22:36:47,748 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 22:36:47,748 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 22:36:47,749 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 22:36:47,749 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 22:36:47,749 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-09 22:36:47,750 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 22:36:47,750 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-09 22:36:47,754 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 22:36:47,755 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 22:36:47,755 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-09 22:36:47,755 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 22:36:47,756 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-09 22:36:47,756 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-09 22:36:47,756 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 22:36:47,756 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 22:36:47,756 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-09 22:36:47,757 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 22:36:47,757 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 22:36:47,757 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-09 22:36:47,757 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-09 22:36:47,758 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 22:36:47,758 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 22:36:47,758 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-09 22:36:47,760 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-09 22:36:47,760 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 22:36:47,761 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 05dbf98a57cbdf117305bcdd9c3dde8d1b2284b890adec5d1f5924f0e5e4bbbb [2024-11-09 22:36:48,011 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 22:36:48,036 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 22:36:48,039 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 22:36:48,040 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 22:36:48,040 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 22:36:48,041 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound50.c [2024-11-09 22:36:49,415 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 22:36:49,581 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 22:36:49,582 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound50.c [2024-11-09 22:36:49,588 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/473522def/2269f76ccb004ba3841907e2fa762f00/FLAGfc8874564 [2024-11-09 22:36:49,992 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/473522def/2269f76ccb004ba3841907e2fa762f00 [2024-11-09 22:36:49,994 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 22:36:49,996 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 22:36:49,997 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 22:36:49,997 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 22:36:50,003 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 22:36:50,003 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:36:49" (1/1) ... [2024-11-09 22:36:50,004 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76d245d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:36:50, skipping insertion in model container [2024-11-09 22:36:50,004 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:36:49" (1/1) ... [2024-11-09 22:36:50,027 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 22:36:50,192 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound50.c[490,503] [2024-11-09 22:36:50,214 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 22:36:50,228 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 22:36:50,237 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound50.c[490,503] [2024-11-09 22:36:50,246 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 22:36:50,290 INFO L204 MainTranslator]: Completed translation [2024-11-09 22:36:50,294 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:36:50 WrapperNode [2024-11-09 22:36:50,294 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 22:36:50,295 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 22:36:50,297 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 22:36:50,298 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 22:36:50,323 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:36:50" (1/1) ... [2024-11-09 22:36:50,339 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:36:50" (1/1) ... [2024-11-09 22:36:50,363 INFO L138 Inliner]: procedures = 14, calls = 16, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 80 [2024-11-09 22:36:50,365 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 22:36:50,366 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 22:36:50,366 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 22:36:50,366 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 22:36:50,376 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:36:50" (1/1) ... [2024-11-09 22:36:50,377 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:36:50" (1/1) ... [2024-11-09 22:36:50,379 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:36:50" (1/1) ... [2024-11-09 22:36:50,401 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-11-09 22:36:50,405 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:36:50" (1/1) ... [2024-11-09 22:36:50,405 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:36:50" (1/1) ... [2024-11-09 22:36:50,408 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:36:50" (1/1) ... [2024-11-09 22:36:50,409 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:36:50" (1/1) ... [2024-11-09 22:36:50,415 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:36:50" (1/1) ... [2024-11-09 22:36:50,416 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:36:50" (1/1) ... [2024-11-09 22:36:50,418 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 22:36:50,418 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-09 22:36:50,422 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-09 22:36:50,422 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-09 22:36:50,423 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:36:50" (1/1) ... [2024-11-09 22:36:50,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-09 22:36:50,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 22:36:50,457 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-09 22:36:50,463 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-09 22:36:50,508 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 22:36:50,509 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-11-09 22:36:50,509 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-11-09 22:36:50,509 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-09 22:36:50,509 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 22:36:50,509 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 22:36:50,510 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-09 22:36:50,511 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-09 22:36:50,571 INFO L256 CfgBuilder]: Building ICFG [2024-11-09 22:36:50,572 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 22:36:50,712 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2024-11-09 22:36:50,713 INFO L307 CfgBuilder]: Performing block encoding [2024-11-09 22:36:50,728 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 22:36:50,728 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-09 22:36:50,729 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 09.11 10:36:50 BoogieIcfgContainer [2024-11-09 22:36:50,729 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-09 22:36:50,731 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 22:36:50,731 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 22:36:50,736 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 22:36:50,736 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 10:36:49" (1/3) ... [2024-11-09 22:36:50,737 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44142dd6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 10:36:50, skipping insertion in model container [2024-11-09 22:36:50,737 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:36:50" (2/3) ... [2024-11-09 22:36:50,738 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44142dd6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 10:36:50, skipping insertion in model container [2024-11-09 22:36:50,739 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 09.11 10:36:50" (3/3) ... [2024-11-09 22:36:50,740 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd3-ll_valuebound50.c [2024-11-09 22:36:50,756 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 22:36:50,756 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-09 22:36:50,820 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 22:36:50,827 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;@6f98df67, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 22:36:50,828 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-09 22:36:50,833 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 27 states have internal predecessors, (38), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-09 22:36:50,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-09 22:36:50,839 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 22:36:50,839 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 22:36:50,840 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 22:36:50,844 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 22:36:50,844 INFO L85 PathProgramCache]: Analyzing trace with hash 1204067688, now seen corresponding path program 1 times [2024-11-09 22:36:50,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 22:36:50,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647017603] [2024-11-09 22:36:50,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 22:36:50,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 22:36:50,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:36:50,987 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 22:36:50,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:36:50,994 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-09 22:36:50,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:36:50,999 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-11-09 22:36:51,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:36:51,004 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-09 22:36:51,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:36:51,010 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-09 22:36:51,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 22:36:51,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647017603] [2024-11-09 22:36:51,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647017603] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 22:36:51,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 22:36:51,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 22:36:51,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49479584] [2024-11-09 22:36:51,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 22:36:51,017 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-09 22:36:51,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 22:36:51,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-09 22:36:51,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-09 22:36:51,045 INFO L87 Difference]: Start difference. First operand has 39 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 27 states have internal predecessors, (38), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-09 22:36:51,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 22:36:51,063 INFO L93 Difference]: Finished difference Result 75 states and 117 transitions. [2024-11-09 22:36:51,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-09 22:36:51,065 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2024-11-09 22:36:51,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 22:36:51,072 INFO L225 Difference]: With dead ends: 75 [2024-11-09 22:36:51,072 INFO L226 Difference]: Without dead ends: 35 [2024-11-09 22:36:51,075 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-09 22:36:51,079 INFO L432 NwaCegarLoop]: 48 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 22:36:51,080 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 22:36:51,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-11-09 22:36:51,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2024-11-09 22:36:51,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 23 states have (on average 1.173913043478261) internal successors, (27), 24 states have internal predecessors, (27), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-09 22:36:51,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2024-11-09 22:36:51,121 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 30 [2024-11-09 22:36:51,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 22:36:51,122 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2024-11-09 22:36:51,122 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-09 22:36:51,123 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2024-11-09 22:36:51,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-09 22:36:51,125 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 22:36:51,126 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 22:36:51,126 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 22:36:51,127 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 22:36:51,127 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 22:36:51,128 INFO L85 PathProgramCache]: Analyzing trace with hash -440055221, now seen corresponding path program 1 times [2024-11-09 22:36:51,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 22:36:51,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794939154] [2024-11-09 22:36:51,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 22:36:51,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 22:36:51,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:36:51,374 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 22:36:51,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:36:51,384 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-09 22:36:51,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:36:51,392 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-11-09 22:36:51,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:36:51,399 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-09 22:36:51,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:36:51,440 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-09 22:36:51,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 22:36:51,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794939154] [2024-11-09 22:36:51,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794939154] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 22:36:51,441 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 22:36:51,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-09 22:36:51,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729835264] [2024-11-09 22:36:51,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 22:36:51,443 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-09 22:36:51,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 22:36:51,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 22:36:51,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-09 22:36:51,448 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-09 22:36:51,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 22:36:51,561 INFO L93 Difference]: Finished difference Result 58 states and 73 transitions. [2024-11-09 22:36:51,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 22:36:51,562 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 32 [2024-11-09 22:36:51,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 22:36:51,563 INFO L225 Difference]: With dead ends: 58 [2024-11-09 22:36:51,563 INFO L226 Difference]: Without dead ends: 50 [2024-11-09 22:36:51,564 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-09 22:36:51,565 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 25 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 22:36:51,565 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 136 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 22:36:51,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2024-11-09 22:36:51,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 38. [2024-11-09 22:36:51,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 27 states have internal predecessors, (30), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-09 22:36:51,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 47 transitions. [2024-11-09 22:36:51,578 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 47 transitions. Word has length 32 [2024-11-09 22:36:51,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 22:36:51,578 INFO L471 AbstractCegarLoop]: Abstraction has 38 states and 47 transitions. [2024-11-09 22:36:51,578 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-09 22:36:51,579 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 47 transitions. [2024-11-09 22:36:51,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-09 22:36:51,580 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 22:36:51,580 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 22:36:51,580 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-09 22:36:51,580 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 22:36:51,581 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 22:36:51,581 INFO L85 PathProgramCache]: Analyzing trace with hash -1503367536, now seen corresponding path program 1 times [2024-11-09 22:36:51,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 22:36:51,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787057534] [2024-11-09 22:36:51,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 22:36:51,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 22:36:51,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 22:36:51,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1122405425] [2024-11-09 22:36:51,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 22:36:51,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 22:36:51,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 22:36:51,618 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 22:36:51,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 22:36:51,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:36:51,690 INFO L255 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-09 22:36:51,695 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 22:36:51,848 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-09 22:36:51,848 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 22:36:51,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 22:36:51,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787057534] [2024-11-09 22:36:51,849 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 22:36:51,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122405425] [2024-11-09 22:36:51,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122405425] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 22:36:51,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 22:36:51,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-09 22:36:51,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248290638] [2024-11-09 22:36:51,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 22:36:51,851 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 22:36:51,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 22:36:51,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 22:36:51,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 22:36:51,853 INFO L87 Difference]: Start difference. First operand 38 states and 47 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-09 22:36:51,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 22:36:51,912 INFO L93 Difference]: Finished difference Result 57 states and 71 transitions. [2024-11-09 22:36:51,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 22:36:51,914 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 37 [2024-11-09 22:36:51,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 22:36:51,916 INFO L225 Difference]: With dead ends: 57 [2024-11-09 22:36:51,917 INFO L226 Difference]: Without dead ends: 54 [2024-11-09 22:36:51,917 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-09 22:36:51,919 INFO L432 NwaCegarLoop]: 39 mSDtfsCounter, 7 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 22:36:51,921 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 150 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 22:36:51,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-11-09 22:36:51,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2024-11-09 22:36:51,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 37 states have internal predecessors, (42), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-11-09 22:36:51,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 67 transitions. [2024-11-09 22:36:51,937 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 67 transitions. Word has length 37 [2024-11-09 22:36:51,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 22:36:51,937 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 67 transitions. [2024-11-09 22:36:51,938 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-09 22:36:51,938 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 67 transitions. [2024-11-09 22:36:51,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-09 22:36:51,940 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 22:36:51,940 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 22:36:51,957 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-09 22:36:52,140 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 22:36:52,141 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 22:36:52,141 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 22:36:52,141 INFO L85 PathProgramCache]: Analyzing trace with hash 383673201, now seen corresponding path program 1 times [2024-11-09 22:36:52,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 22:36:52,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020567584] [2024-11-09 22:36:52,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 22:36:52,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 22:36:52,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:36:52,305 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 22:36:52,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:36:52,308 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-09 22:36:52,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:36:52,311 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-11-09 22:36:52,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:36:52,334 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-09 22:36:52,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:36:52,339 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-09 22:36:52,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 22:36:52,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020567584] [2024-11-09 22:36:52,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020567584] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 22:36:52,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328604370] [2024-11-09 22:36:52,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 22:36:52,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 22:36:52,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 22:36:52,343 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 22:36:52,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 22:36:52,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:36:52,395 INFO L255 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-09 22:36:52,397 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 22:36:52,459 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-09 22:36:52,461 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 22:36:52,572 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-09 22:36:52,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328604370] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 22:36:52,574 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 22:36:52,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 12 [2024-11-09 22:36:52,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167194968] [2024-11-09 22:36:52,574 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 22:36:52,575 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-09 22:36:52,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 22:36:52,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-09 22:36:52,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-11-09 22:36:52,576 INFO L87 Difference]: Start difference. First operand 53 states and 67 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-09 22:36:52,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 22:36:52,800 INFO L93 Difference]: Finished difference Result 118 states and 158 transitions. [2024-11-09 22:36:52,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-09 22:36:52,802 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 39 [2024-11-09 22:36:52,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 22:36:52,803 INFO L225 Difference]: With dead ends: 118 [2024-11-09 22:36:52,803 INFO L226 Difference]: Without dead ends: 110 [2024-11-09 22:36:52,804 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 77 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2024-11-09 22:36:52,804 INFO L432 NwaCegarLoop]: 47 mSDtfsCounter, 66 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 22:36:52,805 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 384 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 22:36:52,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2024-11-09 22:36:52,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 81. [2024-11-09 22:36:52,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 60 states have (on average 1.2) internal successors, (72), 61 states have internal predecessors, (72), 17 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2024-11-09 22:36:52,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 105 transitions. [2024-11-09 22:36:52,830 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 105 transitions. Word has length 39 [2024-11-09 22:36:52,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 22:36:52,830 INFO L471 AbstractCegarLoop]: Abstraction has 81 states and 105 transitions. [2024-11-09 22:36:52,832 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-09 22:36:52,832 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 105 transitions. [2024-11-09 22:36:52,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-11-09 22:36:52,833 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 22:36:52,833 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 22:36:52,851 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-09 22:36:53,033 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2024-11-09 22:36:53,034 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 22:36:53,034 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 22:36:53,034 INFO L85 PathProgramCache]: Analyzing trace with hash -1151148547, now seen corresponding path program 1 times [2024-11-09 22:36:53,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 22:36:53,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379869104] [2024-11-09 22:36:53,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 22:36:53,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 22:36:53,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 22:36:53,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1819243307] [2024-11-09 22:36:53,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 22:36:53,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 22:36:53,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 22:36:53,060 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 22:36:53,062 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 22:36:53,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:36:53,118 INFO L255 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-09 22:36:53,120 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 22:36:53,214 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-09 22:36:53,215 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 22:36:53,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 22:36:53,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379869104] [2024-11-09 22:36:53,215 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 22:36:53,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819243307] [2024-11-09 22:36:53,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819243307] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 22:36:53,216 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 22:36:53,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-09 22:36:53,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553475421] [2024-11-09 22:36:53,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 22:36:53,219 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 22:36:53,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 22:36:53,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 22:36:53,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 22:36:53,220 INFO L87 Difference]: Start difference. First operand 81 states and 105 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-09 22:36:53,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 22:36:53,280 INFO L93 Difference]: Finished difference Result 90 states and 113 transitions. [2024-11-09 22:36:53,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 22:36:53,281 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 42 [2024-11-09 22:36:53,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 22:36:53,282 INFO L225 Difference]: With dead ends: 90 [2024-11-09 22:36:53,282 INFO L226 Difference]: Without dead ends: 87 [2024-11-09 22:36:53,283 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-09 22:36:53,283 INFO L432 NwaCegarLoop]: 40 mSDtfsCounter, 7 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 147 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 [2024-11-09 22:36:53,284 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 147 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 22:36:53,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2024-11-09 22:36:53,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 85. [2024-11-09 22:36:53,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 63 states have (on average 1.1904761904761905) internal successors, (75), 64 states have internal predecessors, (75), 17 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2024-11-09 22:36:53,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 108 transitions. [2024-11-09 22:36:53,302 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 108 transitions. Word has length 42 [2024-11-09 22:36:53,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 22:36:53,302 INFO L471 AbstractCegarLoop]: Abstraction has 85 states and 108 transitions. [2024-11-09 22:36:53,303 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-09 22:36:53,303 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 108 transitions. [2024-11-09 22:36:53,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-09 22:36:53,304 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 22:36:53,304 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 22:36:53,322 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-09 22:36:53,504 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 22:36:53,505 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 22:36:53,505 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 22:36:53,506 INFO L85 PathProgramCache]: Analyzing trace with hash 652942634, now seen corresponding path program 1 times [2024-11-09 22:36:53,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 22:36:53,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374920346] [2024-11-09 22:36:53,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 22:36:53,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 22:36:53,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 22:36:53,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1439163274] [2024-11-09 22:36:53,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 22:36:53,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 22:36:53,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 22:36:53,535 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 22:36:53,546 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 22:36:53,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:36:53,597 INFO L255 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-09 22:36:53,599 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 22:36:53,734 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-09 22:36:53,734 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 22:36:53,917 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-09 22:36:53,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 22:36:53,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374920346] [2024-11-09 22:36:53,918 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 22:36:53,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439163274] [2024-11-09 22:36:53,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439163274] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 22:36:53,918 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-09 22:36:53,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2024-11-09 22:36:53,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550304057] [2024-11-09 22:36:53,919 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-09 22:36:53,919 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-09 22:36:53,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 22:36:53,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-09 22:36:53,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-11-09 22:36:53,920 INFO L87 Difference]: Start difference. First operand 85 states and 108 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 8 states have internal predecessors, (44), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-09 22:36:54,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 22:36:54,117 INFO L93 Difference]: Finished difference Result 129 states and 165 transitions. [2024-11-09 22:36:54,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 22:36:54,118 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 8 states have internal predecessors, (44), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 44 [2024-11-09 22:36:54,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 22:36:54,120 INFO L225 Difference]: With dead ends: 129 [2024-11-09 22:36:54,121 INFO L226 Difference]: Without dead ends: 126 [2024-11-09 22:36:54,121 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-11-09 22:36:54,122 INFO L432 NwaCegarLoop]: 58 mSDtfsCounter, 14 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 22:36:54,123 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 357 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 22:36:54,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2024-11-09 22:36:54,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 122. [2024-11-09 22:36:54,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 91 states have (on average 1.1978021978021978) internal successors, (109), 92 states have internal predecessors, (109), 25 states have call successors, (25), 5 states have call predecessors, (25), 5 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2024-11-09 22:36:54,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 158 transitions. [2024-11-09 22:36:54,150 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 158 transitions. Word has length 44 [2024-11-09 22:36:54,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 22:36:54,150 INFO L471 AbstractCegarLoop]: Abstraction has 122 states and 158 transitions. [2024-11-09 22:36:54,151 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 8 states have internal predecessors, (44), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-09 22:36:54,151 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 158 transitions. [2024-11-09 22:36:54,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-09 22:36:54,153 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 22:36:54,153 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 22:36:54,169 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-09 22:36:54,356 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 22:36:54,356 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 22:36:54,357 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 22:36:54,357 INFO L85 PathProgramCache]: Analyzing trace with hash 898378352, now seen corresponding path program 1 times [2024-11-09 22:36:54,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 22:36:54,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218977744] [2024-11-09 22:36:54,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 22:36:54,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 22:36:54,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 22:36:54,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [217213841] [2024-11-09 22:36:54,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 22:36:54,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 22:36:54,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 22:36:54,371 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 22:36:54,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-09 22:36:54,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:36:54,427 INFO L255 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-09 22:36:54,428 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 22:36:54,477 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-09 22:36:54,478 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 22:36:54,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 22:36:54,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218977744] [2024-11-09 22:36:54,479 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 22:36:54,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217213841] [2024-11-09 22:36:54,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217213841] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 22:36:54,479 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 22:36:54,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-09 22:36:54,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014276780] [2024-11-09 22:36:54,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 22:36:54,480 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 22:36:54,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 22:36:54,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 22:36:54,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 22:36:54,481 INFO L87 Difference]: Start difference. First operand 122 states and 158 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-09 22:36:54,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 22:36:54,546 INFO L93 Difference]: Finished difference Result 176 states and 238 transitions. [2024-11-09 22:36:54,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 22:36:54,547 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 47 [2024-11-09 22:36:54,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 22:36:54,551 INFO L225 Difference]: With dead ends: 176 [2024-11-09 22:36:54,551 INFO L226 Difference]: Without dead ends: 173 [2024-11-09 22:36:54,551 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-09 22:36:54,552 INFO L432 NwaCegarLoop]: 38 mSDtfsCounter, 6 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 22:36:54,552 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 140 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 22:36:54,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2024-11-09 22:36:54,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 167. [2024-11-09 22:36:54,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 115 states have (on average 1.2173913043478262) internal successors, (140), 116 states have internal predecessors, (140), 45 states have call successors, (45), 6 states have call predecessors, (45), 6 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2024-11-09 22:36:54,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 229 transitions. [2024-11-09 22:36:54,593 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 229 transitions. Word has length 47 [2024-11-09 22:36:54,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 22:36:54,594 INFO L471 AbstractCegarLoop]: Abstraction has 167 states and 229 transitions. [2024-11-09 22:36:54,594 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-09 22:36:54,595 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 229 transitions. [2024-11-09 22:36:54,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-09 22:36:54,595 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 22:36:54,597 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 22:36:54,613 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-09 22:36:54,800 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 22:36:54,801 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 22:36:54,801 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 22:36:54,801 INFO L85 PathProgramCache]: Analyzing trace with hash -1868349533, now seen corresponding path program 1 times [2024-11-09 22:36:54,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 22:36:54,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574996166] [2024-11-09 22:36:54,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 22:36:54,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 22:36:54,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 22:36:54,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [405098614] [2024-11-09 22:36:54,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 22:36:54,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 22:36:54,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 22:36:54,823 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 22:36:54,825 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-09 22:36:54,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:36:54,873 INFO L255 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-09 22:36:54,875 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 22:36:55,073 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-09 22:36:55,074 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 22:36:55,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 22:36:55,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574996166] [2024-11-09 22:36:55,137 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 22:36:55,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405098614] [2024-11-09 22:36:55,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405098614] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 22:36:55,137 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-09 22:36:55,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2024-11-09 22:36:55,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005446539] [2024-11-09 22:36:55,138 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-09 22:36:55,138 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-09 22:36:55,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 22:36:55,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-09 22:36:55,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-11-09 22:36:55,139 INFO L87 Difference]: Start difference. First operand 167 states and 229 transitions. Second operand has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-09 22:36:55,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 22:36:55,315 INFO L93 Difference]: Finished difference Result 181 states and 241 transitions. [2024-11-09 22:36:55,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-09 22:36:55,316 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 49 [2024-11-09 22:36:55,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 22:36:55,318 INFO L225 Difference]: With dead ends: 181 [2024-11-09 22:36:55,318 INFO L226 Difference]: Without dead ends: 178 [2024-11-09 22:36:55,319 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2024-11-09 22:36:55,319 INFO L432 NwaCegarLoop]: 43 mSDtfsCounter, 32 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 22:36:55,319 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 258 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 22:36:55,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2024-11-09 22:36:55,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 175. [2024-11-09 22:36:55,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 121 states have (on average 1.2066115702479339) internal successors, (146), 122 states have internal predecessors, (146), 45 states have call successors, (45), 8 states have call predecessors, (45), 8 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2024-11-09 22:36:55,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 235 transitions. [2024-11-09 22:36:55,349 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 235 transitions. Word has length 49 [2024-11-09 22:36:55,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 22:36:55,350 INFO L471 AbstractCegarLoop]: Abstraction has 175 states and 235 transitions. [2024-11-09 22:36:55,350 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-09 22:36:55,350 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 235 transitions. [2024-11-09 22:36:55,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-11-09 22:36:55,351 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 22:36:55,351 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 22:36:55,368 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-09 22:36:55,555 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 22:36:55,556 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 22:36:55,556 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 22:36:55,556 INFO L85 PathProgramCache]: Analyzing trace with hash 503958941, now seen corresponding path program 1 times [2024-11-09 22:36:55,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 22:36:55,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888459205] [2024-11-09 22:36:55,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 22:36:55,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 22:36:55,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 22:36:55,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [458312328] [2024-11-09 22:36:55,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 22:36:55,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 22:36:55,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 22:36:55,570 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 22:36:55,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-09 22:36:55,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:36:55,623 INFO L255 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-09 22:36:55,624 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 22:36:55,665 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-09 22:36:55,665 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 22:36:55,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 22:36:55,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888459205] [2024-11-09 22:36:55,666 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 22:36:55,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458312328] [2024-11-09 22:36:55,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [458312328] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 22:36:55,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 22:36:55,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-09 22:36:55,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444047516] [2024-11-09 22:36:55,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 22:36:55,667 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 22:36:55,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 22:36:55,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 22:36:55,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 22:36:55,667 INFO L87 Difference]: Start difference. First operand 175 states and 235 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-09 22:36:55,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 22:36:55,733 INFO L93 Difference]: Finished difference Result 257 states and 366 transitions. [2024-11-09 22:36:55,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 22:36:55,734 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 52 [2024-11-09 22:36:55,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 22:36:55,736 INFO L225 Difference]: With dead ends: 257 [2024-11-09 22:36:55,736 INFO L226 Difference]: Without dead ends: 254 [2024-11-09 22:36:55,736 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-09 22:36:55,737 INFO L432 NwaCegarLoop]: 41 mSDtfsCounter, 4 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 22:36:55,737 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 148 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 22:36:55,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2024-11-09 22:36:55,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 239. [2024-11-09 22:36:55,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 144 states have (on average 1.1736111111111112) internal successors, (169), 155 states have internal predecessors, (169), 85 states have call successors, (85), 9 states have call predecessors, (85), 9 states have return successors, (84), 74 states have call predecessors, (84), 84 states have call successors, (84) [2024-11-09 22:36:55,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 338 transitions. [2024-11-09 22:36:55,767 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 338 transitions. Word has length 52 [2024-11-09 22:36:55,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 22:36:55,767 INFO L471 AbstractCegarLoop]: Abstraction has 239 states and 338 transitions. [2024-11-09 22:36:55,767 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-09 22:36:55,768 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 338 transitions. [2024-11-09 22:36:55,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-11-09 22:36:55,768 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 22:36:55,769 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 22:36:55,784 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-09 22:36:55,969 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 22:36:55,969 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 22:36:55,970 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 22:36:55,970 INFO L85 PathProgramCache]: Analyzing trace with hash -1382437552, now seen corresponding path program 2 times [2024-11-09 22:36:55,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 22:36:55,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356892837] [2024-11-09 22:36:55,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 22:36:55,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 22:36:55,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:36:56,059 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 22:36:56,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:36:56,062 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-09 22:36:56,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:36:56,064 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-11-09 22:36:56,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:36:56,066 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-09 22:36:56,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:36:56,069 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-09 22:36:56,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 22:36:56,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356892837] [2024-11-09 22:36:56,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356892837] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 22:36:56,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 22:36:56,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-09 22:36:56,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683178348] [2024-11-09 22:36:56,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 22:36:56,070 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 22:36:56,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 22:36:56,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 22:36:56,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 22:36:56,073 INFO L87 Difference]: Start difference. First operand 239 states and 338 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-09 22:36:56,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 22:36:56,170 INFO L93 Difference]: Finished difference Result 302 states and 421 transitions. [2024-11-09 22:36:56,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 22:36:56,170 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 51 [2024-11-09 22:36:56,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 22:36:56,174 INFO L225 Difference]: With dead ends: 302 [2024-11-09 22:36:56,174 INFO L226 Difference]: Without dead ends: 205 [2024-11-09 22:36:56,176 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-11-09 22:36:56,176 INFO L432 NwaCegarLoop]: 56 mSDtfsCounter, 23 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 22:36:56,177 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 185 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 22:36:56,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2024-11-09 22:36:56,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 195. [2024-11-09 22:36:56,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 116 states have (on average 1.1379310344827587) internal successors, (132), 125 states have internal predecessors, (132), 69 states have call successors, (69), 9 states have call predecessors, (69), 9 states have return successors, (68), 60 states have call predecessors, (68), 68 states have call successors, (68) [2024-11-09 22:36:56,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 269 transitions. [2024-11-09 22:36:56,210 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 269 transitions. Word has length 51 [2024-11-09 22:36:56,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 22:36:56,211 INFO L471 AbstractCegarLoop]: Abstraction has 195 states and 269 transitions. [2024-11-09 22:36:56,211 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-09 22:36:56,211 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 269 transitions. [2024-11-09 22:36:56,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-11-09 22:36:56,212 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 22:36:56,212 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 22:36:56,212 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-09 22:36:56,212 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 22:36:56,212 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 22:36:56,212 INFO L85 PathProgramCache]: Analyzing trace with hash 538614248, now seen corresponding path program 1 times [2024-11-09 22:36:56,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 22:36:56,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377802193] [2024-11-09 22:36:56,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 22:36:56,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 22:36:56,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 22:36:56,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1717055737] [2024-11-09 22:36:56,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 22:36:56,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 22:36:56,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 22:36:56,244 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 22:36:56,246 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-09 22:36:56,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:36:56,303 INFO L255 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-11-09 22:36:56,305 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 22:36:57,056 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 14 proven. 9 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-11-09 22:36:57,056 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 22:36:58,416 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-11-09 22:36:58,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 22:36:58,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377802193] [2024-11-09 22:36:58,417 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 22:36:58,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717055737] [2024-11-09 22:36:58,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717055737] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 22:36:58,418 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-09 22:36:58,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2024-11-09 22:36:58,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848306660] [2024-11-09 22:36:58,418 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-09 22:36:58,419 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-09 22:36:58,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 22:36:58,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-09 22:36:58,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2024-11-09 22:36:58,420 INFO L87 Difference]: Start difference. First operand 195 states and 269 transitions. Second operand has 23 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 states have internal predecessors, (54), 6 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2024-11-09 22:37:02,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 22:37:02,496 INFO L93 Difference]: Finished difference Result 526 states and 746 transitions. [2024-11-09 22:37:02,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-11-09 22:37:02,496 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 states have internal predecessors, (54), 6 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 66 [2024-11-09 22:37:02,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 22:37:02,499 INFO L225 Difference]: With dead ends: 526 [2024-11-09 22:37:02,499 INFO L226 Difference]: Without dead ends: 405 [2024-11-09 22:37:02,500 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=398, Invalid=1672, Unknown=0, NotChecked=0, Total=2070 [2024-11-09 22:37:02,501 INFO L432 NwaCegarLoop]: 38 mSDtfsCounter, 226 mSDsluCounter, 449 mSDsCounter, 0 mSdLazyCounter, 571 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 487 SdHoareTripleChecker+Invalid, 724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2024-11-09 22:37:02,501 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [234 Valid, 487 Invalid, 724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 571 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2024-11-09 22:37:02,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2024-11-09 22:37:02,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 305. [2024-11-09 22:37:02,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 199 states have (on average 1.1557788944723617) internal successors, (230), 206 states have internal predecessors, (230), 93 states have call successors, (93), 12 states have call predecessors, (93), 12 states have return successors, (92), 86 states have call predecessors, (92), 92 states have call successors, (92) [2024-11-09 22:37:02,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 415 transitions. [2024-11-09 22:37:02,590 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 415 transitions. Word has length 66 [2024-11-09 22:37:02,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 22:37:02,591 INFO L471 AbstractCegarLoop]: Abstraction has 305 states and 415 transitions. [2024-11-09 22:37:02,591 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 states have internal predecessors, (54), 6 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2024-11-09 22:37:02,591 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 415 transitions. [2024-11-09 22:37:02,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2024-11-09 22:37:02,592 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 22:37:02,592 INFO L215 NwaCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 22:37:02,605 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-09 22:37:02,793 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,SelfDestructingSolverStorable10 [2024-11-09 22:37:02,793 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 22:37:02,794 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 22:37:02,794 INFO L85 PathProgramCache]: Analyzing trace with hash -308189961, now seen corresponding path program 1 times [2024-11-09 22:37:02,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 22:37:02,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017575500] [2024-11-09 22:37:02,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 22:37:02,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 22:37:02,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 22:37:02,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1824297601] [2024-11-09 22:37:02,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 22:37:02,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 22:37:02,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 22:37:02,813 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 22:37:02,816 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-09 22:37:02,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:37:02,870 INFO L255 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-09 22:37:02,872 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 22:37:02,947 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2024-11-09 22:37:02,947 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 22:37:03,007 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2024-11-09 22:37:03,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 22:37:03,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017575500] [2024-11-09 22:37:03,008 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 22:37:03,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824297601] [2024-11-09 22:37:03,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824297601] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-09 22:37:03,008 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 22:37:03,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2024-11-09 22:37:03,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119441214] [2024-11-09 22:37:03,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 22:37:03,009 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 22:37:03,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 22:37:03,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 22:37:03,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-09 22:37:03,010 INFO L87 Difference]: Start difference. First operand 305 states and 415 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-09 22:37:03,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 22:37:03,141 INFO L93 Difference]: Finished difference Result 312 states and 421 transitions. [2024-11-09 22:37:03,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 22:37:03,142 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 75 [2024-11-09 22:37:03,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 22:37:03,145 INFO L225 Difference]: With dead ends: 312 [2024-11-09 22:37:03,145 INFO L226 Difference]: Without dead ends: 309 [2024-11-09 22:37:03,145 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 141 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-11-09 22:37:03,146 INFO L432 NwaCegarLoop]: 41 mSDtfsCounter, 4 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 22:37:03,146 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 142 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 22:37:03,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2024-11-09 22:37:03,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 309. [2024-11-09 22:37:03,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 202 states have (on average 1.1534653465346534) internal successors, (233), 209 states have internal predecessors, (233), 93 states have call successors, (93), 13 states have call predecessors, (93), 13 states have return successors, (92), 86 states have call predecessors, (92), 92 states have call successors, (92) [2024-11-09 22:37:03,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 418 transitions. [2024-11-09 22:37:03,226 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 418 transitions. Word has length 75 [2024-11-09 22:37:03,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 22:37:03,226 INFO L471 AbstractCegarLoop]: Abstraction has 309 states and 418 transitions. [2024-11-09 22:37:03,226 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-09 22:37:03,226 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 418 transitions. [2024-11-09 22:37:03,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2024-11-09 22:37:03,227 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 22:37:03,227 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 22:37:03,244 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-09 22:37:03,430 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 22:37:03,430 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 22:37:03,430 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 22:37:03,431 INFO L85 PathProgramCache]: Analyzing trace with hash -2085625555, now seen corresponding path program 1 times [2024-11-09 22:37:03,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 22:37:03,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35953910] [2024-11-09 22:37:03,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 22:37:03,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 22:37:03,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 22:37:03,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [195074709] [2024-11-09 22:37:03,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 22:37:03,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 22:37:03,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 22:37:03,452 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 22:37:03,458 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-09 22:37:03,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:37:03,510 INFO L255 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-11-09 22:37:03,512 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 22:37:04,017 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 16 proven. 41 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-09 22:37:04,017 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 22:37:04,146 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 32 proven. 10 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-09 22:37:04,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 22:37:04,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35953910] [2024-11-09 22:37:04,146 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 22:37:04,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195074709] [2024-11-09 22:37:04,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195074709] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 22:37:04,146 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-09 22:37:04,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 8] total 22 [2024-11-09 22:37:04,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969397339] [2024-11-09 22:37:04,146 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-09 22:37:04,147 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-09 22:37:04,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 22:37:04,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-09 22:37:04,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2024-11-09 22:37:04,148 INFO L87 Difference]: Start difference. First operand 309 states and 418 transitions. Second operand has 22 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 19 states have internal predecessors, (78), 6 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2024-11-09 22:37:06,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 22:37:06,466 INFO L93 Difference]: Finished difference Result 383 states and 520 transitions. [2024-11-09 22:37:06,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-09 22:37:06,467 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 19 states have internal predecessors, (78), 6 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 78 [2024-11-09 22:37:06,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 22:37:06,470 INFO L225 Difference]: With dead ends: 383 [2024-11-09 22:37:06,470 INFO L226 Difference]: Without dead ends: 380 [2024-11-09 22:37:06,470 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=190, Invalid=932, Unknown=0, NotChecked=0, Total=1122 [2024-11-09 22:37:06,471 INFO L432 NwaCegarLoop]: 66 mSDtfsCounter, 140 mSDsluCounter, 691 mSDsCounter, 0 mSdLazyCounter, 683 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 757 SdHoareTripleChecker+Invalid, 774 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 683 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-09 22:37:06,471 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 757 Invalid, 774 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 683 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-09 22:37:06,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2024-11-09 22:37:06,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 317. [2024-11-09 22:37:06,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 208 states have (on average 1.1490384615384615) internal successors, (239), 215 states have internal predecessors, (239), 93 states have call successors, (93), 15 states have call predecessors, (93), 15 states have return successors, (92), 86 states have call predecessors, (92), 92 states have call successors, (92) [2024-11-09 22:37:06,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 424 transitions. [2024-11-09 22:37:06,560 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 424 transitions. Word has length 78 [2024-11-09 22:37:06,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 22:37:06,561 INFO L471 AbstractCegarLoop]: Abstraction has 317 states and 424 transitions. [2024-11-09 22:37:06,561 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 19 states have internal predecessors, (78), 6 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2024-11-09 22:37:06,561 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 424 transitions. [2024-11-09 22:37:06,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2024-11-09 22:37:06,562 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 22:37:06,562 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 22:37:06,579 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-09 22:37:06,762 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,SelfDestructingSolverStorable12 [2024-11-09 22:37:06,763 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 22:37:06,763 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 22:37:06,763 INFO L85 PathProgramCache]: Analyzing trace with hash -882752627, now seen corresponding path program 2 times [2024-11-09 22:37:06,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 22:37:06,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947060035] [2024-11-09 22:37:06,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 22:37:06,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 22:37:06,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:37:06,821 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 22:37:06,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:37:06,823 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-09 22:37:06,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:37:06,825 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-11-09 22:37:06,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:37:06,826 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-09 22:37:06,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:37:06,830 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-11-09 22:37:06,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:37:06,833 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2024-11-09 22:37:06,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:37:06,837 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2024-11-09 22:37:06,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:37:06,840 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-11-09 22:37:06,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:37:06,843 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2024-11-09 22:37:06,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:37:06,848 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2024-11-09 22:37:06,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:37:06,850 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2024-11-09 22:37:06,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 22:37:06,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947060035] [2024-11-09 22:37:06,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947060035] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 22:37:06,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 22:37:06,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-09 22:37:06,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398758923] [2024-11-09 22:37:06,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 22:37:06,854 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 22:37:06,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 22:37:06,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 22:37:06,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 22:37:06,855 INFO L87 Difference]: Start difference. First operand 317 states and 424 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2024-11-09 22:37:06,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 22:37:06,997 INFO L93 Difference]: Finished difference Result 543 states and 729 transitions. [2024-11-09 22:37:06,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 22:37:06,998 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 81 [2024-11-09 22:37:06,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 22:37:07,000 INFO L225 Difference]: With dead ends: 543 [2024-11-09 22:37:07,000 INFO L226 Difference]: Without dead ends: 343 [2024-11-09 22:37:07,001 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-09 22:37:07,001 INFO L432 NwaCegarLoop]: 42 mSDtfsCounter, 1 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 22:37:07,002 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 140 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 22:37:07,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2024-11-09 22:37:07,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 327. [2024-11-09 22:37:07,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 218 states have (on average 1.151376146788991) internal successors, (251), 219 states have internal predecessors, (251), 93 states have call successors, (93), 15 states have call predecessors, (93), 15 states have return successors, (92), 92 states have call predecessors, (92), 92 states have call successors, (92) [2024-11-09 22:37:07,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 436 transitions. [2024-11-09 22:37:07,104 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 436 transitions. Word has length 81 [2024-11-09 22:37:07,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 22:37:07,104 INFO L471 AbstractCegarLoop]: Abstraction has 327 states and 436 transitions. [2024-11-09 22:37:07,104 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2024-11-09 22:37:07,104 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 436 transitions. [2024-11-09 22:37:07,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2024-11-09 22:37:07,105 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 22:37:07,105 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 22:37:07,106 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-09 22:37:07,106 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 22:37:07,106 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 22:37:07,106 INFO L85 PathProgramCache]: Analyzing trace with hash 156730752, now seen corresponding path program 3 times [2024-11-09 22:37:07,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 22:37:07,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193557990] [2024-11-09 22:37:07,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 22:37:07,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 22:37:07,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 22:37:07,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1167048625] [2024-11-09 22:37:07,127 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 22:37:07,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 22:37:07,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 22:37:07,129 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 22:37:07,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-09 22:37:07,187 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-09 22:37:07,188 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 22:37:07,189 INFO L255 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 65 conjuncts are in the unsatisfiable core [2024-11-09 22:37:07,191 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 22:37:08,091 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 21 proven. 33 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2024-11-09 22:37:08,091 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 22:37:13,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 22:37:13,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193557990] [2024-11-09 22:37:13,307 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 22:37:13,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167048625] [2024-11-09 22:37:13,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167048625] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 22:37:13,308 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-09 22:37:13,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2024-11-09 22:37:13,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276068652] [2024-11-09 22:37:13,308 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-09 22:37:13,309 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-09 22:37:13,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 22:37:13,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-09 22:37:13,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2024-11-09 22:37:13,310 INFO L87 Difference]: Start difference. First operand 327 states and 436 transitions. Second operand has 16 states, 15 states have (on average 3.066666666666667) internal successors, (46), 14 states have internal predecessors, (46), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-09 22:37:13,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 22:37:13,947 INFO L93 Difference]: Finished difference Result 405 states and 530 transitions. [2024-11-09 22:37:13,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-09 22:37:13,948 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.066666666666667) internal successors, (46), 14 states have internal predecessors, (46), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 83 [2024-11-09 22:37:13,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 22:37:13,950 INFO L225 Difference]: With dead ends: 405 [2024-11-09 22:37:13,950 INFO L226 Difference]: Without dead ends: 402 [2024-11-09 22:37:13,951 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=167, Invalid=763, Unknown=0, NotChecked=0, Total=930 [2024-11-09 22:37:13,954 INFO L432 NwaCegarLoop]: 55 mSDtfsCounter, 63 mSDsluCounter, 549 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 604 SdHoareTripleChecker+Invalid, 519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 22:37:13,955 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 604 Invalid, 519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 471 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 22:37:13,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2024-11-09 22:37:14,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 390. [2024-11-09 22:37:14,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 260 states have (on average 1.146153846153846) internal successors, (298), 261 states have internal predecessors, (298), 109 states have call successors, (109), 20 states have call predecessors, (109), 20 states have return successors, (108), 108 states have call predecessors, (108), 108 states have call successors, (108) [2024-11-09 22:37:14,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 515 transitions. [2024-11-09 22:37:14,067 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 515 transitions. Word has length 83 [2024-11-09 22:37:14,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 22:37:14,068 INFO L471 AbstractCegarLoop]: Abstraction has 390 states and 515 transitions. [2024-11-09 22:37:14,068 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.066666666666667) internal successors, (46), 14 states have internal predecessors, (46), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-09 22:37:14,068 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 515 transitions. [2024-11-09 22:37:14,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2024-11-09 22:37:14,069 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 22:37:14,069 INFO L215 NwaCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 22:37:14,084 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-09 22:37:14,273 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 [2024-11-09 22:37:14,273 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 22:37:14,274 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 22:37:14,274 INFO L85 PathProgramCache]: Analyzing trace with hash -382848575, now seen corresponding path program 1 times [2024-11-09 22:37:14,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 22:37:14,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720978921] [2024-11-09 22:37:14,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 22:37:14,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 22:37:14,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 22:37:14,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [178756718] [2024-11-09 22:37:14,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 22:37:14,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 22:37:14,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 22:37:14,297 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 22:37:14,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-09 22:37:14,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:37:14,353 INFO L255 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-09 22:37:14,356 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 22:37:14,669 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 26 proven. 23 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2024-11-09 22:37:14,669 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 22:37:15,208 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 23 proven. 17 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2024-11-09 22:37:15,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 22:37:15,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720978921] [2024-11-09 22:37:15,208 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 22:37:15,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178756718] [2024-11-09 22:37:15,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178756718] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 22:37:15,209 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-09 22:37:15,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2024-11-09 22:37:15,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624063238] [2024-11-09 22:37:15,209 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-09 22:37:15,210 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-09 22:37:15,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 22:37:15,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-09 22:37:15,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2024-11-09 22:37:15,211 INFO L87 Difference]: Start difference. First operand 390 states and 515 transitions. Second operand has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 19 states have internal predecessors, (56), 8 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2024-11-09 22:37:17,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 22:37:17,374 INFO L93 Difference]: Finished difference Result 979 states and 1449 transitions. [2024-11-09 22:37:17,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-11-09 22:37:17,375 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 19 states have internal predecessors, (56), 8 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) Word has length 97 [2024-11-09 22:37:17,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 22:37:17,381 INFO L225 Difference]: With dead ends: 979 [2024-11-09 22:37:17,381 INFO L226 Difference]: Without dead ends: 976 [2024-11-09 22:37:17,382 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=528, Invalid=1824, Unknown=0, NotChecked=0, Total=2352 [2024-11-09 22:37:17,383 INFO L432 NwaCegarLoop]: 51 mSDtfsCounter, 184 mSDsluCounter, 512 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 563 SdHoareTripleChecker+Invalid, 607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-09 22:37:17,383 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [188 Valid, 563 Invalid, 607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 480 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-09 22:37:17,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 976 states. [2024-11-09 22:37:17,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 976 to 787. [2024-11-09 22:37:17,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 787 states, 458 states have (on average 1.2096069868995634) internal successors, (554), 459 states have internal predecessors, (554), 305 states have call successors, (305), 23 states have call predecessors, (305), 23 states have return successors, (304), 304 states have call predecessors, (304), 304 states have call successors, (304) [2024-11-09 22:37:17,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 787 states to 787 states and 1163 transitions. [2024-11-09 22:37:17,774 INFO L78 Accepts]: Start accepts. Automaton has 787 states and 1163 transitions. Word has length 97 [2024-11-09 22:37:17,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 22:37:17,774 INFO L471 AbstractCegarLoop]: Abstraction has 787 states and 1163 transitions. [2024-11-09 22:37:17,775 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 19 states have internal predecessors, (56), 8 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2024-11-09 22:37:17,775 INFO L276 IsEmpty]: Start isEmpty. Operand 787 states and 1163 transitions. [2024-11-09 22:37:17,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2024-11-09 22:37:17,776 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 22:37:17,776 INFO L215 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 22:37:17,792 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-09 22:37:17,977 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-09 22:37:17,977 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 22:37:17,977 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 22:37:17,977 INFO L85 PathProgramCache]: Analyzing trace with hash -1581530788, now seen corresponding path program 1 times [2024-11-09 22:37:17,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 22:37:17,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601818370] [2024-11-09 22:37:17,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 22:37:17,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 22:37:17,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 22:37:17,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [380781463] [2024-11-09 22:37:17,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 22:37:17,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 22:37:17,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 22:37:18,003 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 22:37:18,005 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-09 22:37:18,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:37:18,064 INFO L255 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 60 conjuncts are in the unsatisfiable core [2024-11-09 22:37:18,066 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 22:37:19,477 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 36 proven. 36 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2024-11-09 22:37:19,477 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 22:37:20,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 22:37:20,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601818370] [2024-11-09 22:37:20,998 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 22:37:20,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380781463] [2024-11-09 22:37:20,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380781463] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 22:37:20,999 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-09 22:37:20,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2024-11-09 22:37:20,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529679345] [2024-11-09 22:37:20,999 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-09 22:37:20,999 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-09 22:37:20,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 22:37:21,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-09 22:37:21,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2024-11-09 22:37:21,000 INFO L87 Difference]: Start difference. First operand 787 states and 1163 transitions. Second operand has 21 states, 20 states have (on average 2.35) internal successors, (47), 19 states have internal predecessors, (47), 6 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2024-11-09 22:37:23,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 22:37:23,036 INFO L93 Difference]: Finished difference Result 937 states and 1384 transitions. [2024-11-09 22:37:23,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-09 22:37:23,037 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.35) internal successors, (47), 19 states have internal predecessors, (47), 6 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 96 [2024-11-09 22:37:23,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 22:37:23,042 INFO L225 Difference]: With dead ends: 937 [2024-11-09 22:37:23,043 INFO L226 Difference]: Without dead ends: 929 [2024-11-09 22:37:23,043 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=165, Invalid=1167, Unknown=0, NotChecked=0, Total=1332 [2024-11-09 22:37:23,044 INFO L432 NwaCegarLoop]: 64 mSDtfsCounter, 103 mSDsluCounter, 758 mSDsCounter, 0 mSdLazyCounter, 932 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 822 SdHoareTripleChecker+Invalid, 990 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 932 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-09 22:37:23,044 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 822 Invalid, 990 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 932 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-09 22:37:23,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 929 states. [2024-11-09 22:37:23,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 929 to 912. [2024-11-09 22:37:23,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 912 states, 525 states have (on average 1.2152380952380952) internal successors, (638), 526 states have internal predecessors, (638), 361 states have call successors, (361), 25 states have call predecessors, (361), 25 states have return successors, (360), 360 states have call predecessors, (360), 360 states have call successors, (360) [2024-11-09 22:37:23,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 912 states to 912 states and 1359 transitions. [2024-11-09 22:37:23,469 INFO L78 Accepts]: Start accepts. Automaton has 912 states and 1359 transitions. Word has length 96 [2024-11-09 22:37:23,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 22:37:23,469 INFO L471 AbstractCegarLoop]: Abstraction has 912 states and 1359 transitions. [2024-11-09 22:37:23,470 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.35) internal successors, (47), 19 states have internal predecessors, (47), 6 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2024-11-09 22:37:23,470 INFO L276 IsEmpty]: Start isEmpty. Operand 912 states and 1359 transitions. [2024-11-09 22:37:23,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2024-11-09 22:37:23,472 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 22:37:23,472 INFO L215 NwaCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 22:37:23,489 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-09 22:37:23,672 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-09 22:37:23,673 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 22:37:23,673 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 22:37:23,673 INFO L85 PathProgramCache]: Analyzing trace with hash -471812428, now seen corresponding path program 1 times [2024-11-09 22:37:23,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 22:37:23,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705271239] [2024-11-09 22:37:23,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 22:37:23,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 22:37:23,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 22:37:23,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1086882482] [2024-11-09 22:37:23,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 22:37:23,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 22:37:23,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 22:37:23,699 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 22:37:23,701 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-09 22:37:23,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:37:23,777 INFO L255 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-11-09 22:37:23,778 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 22:37:24,472 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 24 proven. 30 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2024-11-09 22:37:24,472 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 22:37:29,274 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 18 proven. 27 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2024-11-09 22:37:29,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 22:37:29,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705271239] [2024-11-09 22:37:29,275 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 22:37:29,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086882482] [2024-11-09 22:37:29,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086882482] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 22:37:29,275 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-09 22:37:29,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2024-11-09 22:37:29,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461109108] [2024-11-09 22:37:29,275 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-09 22:37:29,276 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-09 22:37:29,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 22:37:29,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-09 22:37:29,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=425, Unknown=1, NotChecked=0, Total=506 [2024-11-09 22:37:29,276 INFO L87 Difference]: Start difference. First operand 912 states and 1359 transitions. Second operand has 23 states, 23 states have (on average 3.0434782608695654) internal successors, (70), 20 states have internal predecessors, (70), 8 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2024-11-09 22:37:37,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 22:37:37,477 INFO L93 Difference]: Finished difference Result 1262 states and 1879 transitions. [2024-11-09 22:37:37,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-11-09 22:37:37,478 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.0434782608695654) internal successors, (70), 20 states have internal predecessors, (70), 8 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) Word has length 99 [2024-11-09 22:37:37,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 22:37:37,484 INFO L225 Difference]: With dead ends: 1262 [2024-11-09 22:37:37,485 INFO L226 Difference]: Without dead ends: 1259 [2024-11-09 22:37:37,486 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 765 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=711, Invalid=2828, Unknown=1, NotChecked=0, Total=3540 [2024-11-09 22:37:37,486 INFO L432 NwaCegarLoop]: 64 mSDtfsCounter, 218 mSDsluCounter, 757 mSDsCounter, 0 mSdLazyCounter, 896 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 821 SdHoareTripleChecker+Invalid, 1067 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 896 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2024-11-09 22:37:37,487 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [218 Valid, 821 Invalid, 1067 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 896 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2024-11-09 22:37:37,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1259 states. [2024-11-09 22:37:38,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1259 to 1157. [2024-11-09 22:37:38,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1157 states, 670 states have (on average 1.2223880597014924) internal successors, (819), 671 states have internal predecessors, (819), 457 states have call successors, (457), 29 states have call predecessors, (457), 29 states have return successors, (456), 456 states have call predecessors, (456), 456 states have call successors, (456) [2024-11-09 22:37:38,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1157 states to 1157 states and 1732 transitions. [2024-11-09 22:37:38,107 INFO L78 Accepts]: Start accepts. Automaton has 1157 states and 1732 transitions. Word has length 99 [2024-11-09 22:37:38,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 22:37:38,107 INFO L471 AbstractCegarLoop]: Abstraction has 1157 states and 1732 transitions. [2024-11-09 22:37:38,108 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.0434782608695654) internal successors, (70), 20 states have internal predecessors, (70), 8 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2024-11-09 22:37:38,108 INFO L276 IsEmpty]: Start isEmpty. Operand 1157 states and 1732 transitions. [2024-11-09 22:37:38,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2024-11-09 22:37:38,110 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 22:37:38,110 INFO L215 NwaCegarLoop]: trace histogram [9, 8, 8, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 22:37:38,127 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-09 22:37:38,314 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 22:37:38,315 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 22:37:38,315 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 22:37:38,315 INFO L85 PathProgramCache]: Analyzing trace with hash -117331861, now seen corresponding path program 2 times [2024-11-09 22:37:38,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 22:37:38,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959371028] [2024-11-09 22:37:38,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 22:37:38,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 22:37:38,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:37:38,521 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 22:37:38,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:37:38,523 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-09 22:37:38,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:37:38,524 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-11-09 22:37:38,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:37:38,526 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-09 22:37:38,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:37:38,527 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-11-09 22:37:38,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:37:38,530 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2024-11-09 22:37:38,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:37:38,532 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2024-11-09 22:37:38,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:37:38,535 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-11-09 22:37:38,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:37:38,537 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2024-11-09 22:37:38,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:37:38,539 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2024-11-09 22:37:38,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:37:38,542 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2024-11-09 22:37:38,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:37:38,544 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2024-11-09 22:37:38,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:37:38,547 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 48 proven. 21 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2024-11-09 22:37:38,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 22:37:38,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959371028] [2024-11-09 22:37:38,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959371028] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 22:37:38,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848631574] [2024-11-09 22:37:38,547 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 22:37:38,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 22:37:38,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 22:37:38,550 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 22:37:38,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-09 22:37:38,657 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 22:37:38,658 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 22:37:38,659 INFO L255 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-09 22:37:38,661 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 22:37:38,724 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 48 proven. 21 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2024-11-09 22:37:38,724 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 22:37:38,847 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 48 proven. 21 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2024-11-09 22:37:38,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848631574] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 22:37:38,848 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 22:37:38,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 11 [2024-11-09 22:37:38,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57096623] [2024-11-09 22:37:38,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 22:37:38,848 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-09 22:37:38,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 22:37:38,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-09 22:37:38,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2024-11-09 22:37:38,849 INFO L87 Difference]: Start difference. First operand 1157 states and 1732 transitions. Second operand has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 11 states have internal predecessors, (49), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2024-11-09 22:37:39,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 22:37:39,910 INFO L93 Difference]: Finished difference Result 1287 states and 1919 transitions. [2024-11-09 22:37:39,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-09 22:37:39,911 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 11 states have internal predecessors, (49), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 107 [2024-11-09 22:37:39,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 22:37:39,918 INFO L225 Difference]: With dead ends: 1287 [2024-11-09 22:37:39,919 INFO L226 Difference]: Without dead ends: 1279 [2024-11-09 22:37:39,919 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 235 SyntacticMatches, 8 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=141, Invalid=459, Unknown=0, NotChecked=0, Total=600 [2024-11-09 22:37:39,920 INFO L432 NwaCegarLoop]: 71 mSDtfsCounter, 86 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 486 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 22:37:39,920 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 486 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 22:37:39,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1279 states. [2024-11-09 22:37:40,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1279 to 1117. [2024-11-09 22:37:40,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1117 states, 638 states have (on average 1.2272727272727273) internal successors, (783), 639 states have internal predecessors, (783), 449 states have call successors, (449), 29 states have call predecessors, (449), 29 states have return successors, (448), 448 states have call predecessors, (448), 448 states have call successors, (448) [2024-11-09 22:37:40,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1117 states to 1117 states and 1680 transitions. [2024-11-09 22:37:40,570 INFO L78 Accepts]: Start accepts. Automaton has 1117 states and 1680 transitions. Word has length 107 [2024-11-09 22:37:40,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 22:37:40,570 INFO L471 AbstractCegarLoop]: Abstraction has 1117 states and 1680 transitions. [2024-11-09 22:37:40,570 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 11 states have internal predecessors, (49), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2024-11-09 22:37:40,571 INFO L276 IsEmpty]: Start isEmpty. Operand 1117 states and 1680 transitions. [2024-11-09 22:37:40,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2024-11-09 22:37:40,572 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 22:37:40,572 INFO L215 NwaCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 22:37:40,580 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-09 22:37:40,773 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 22:37:40,773 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 22:37:40,774 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 22:37:40,774 INFO L85 PathProgramCache]: Analyzing trace with hash 1115104424, now seen corresponding path program 2 times [2024-11-09 22:37:40,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 22:37:40,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167825362] [2024-11-09 22:37:40,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 22:37:40,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 22:37:40,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 22:37:40,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1127884848] [2024-11-09 22:37:40,787 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 22:37:40,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 22:37:40,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 22:37:40,789 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 22:37:40,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-09 22:37:40,890 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 22:37:40,890 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 22:37:40,891 INFO L255 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-11-09 22:37:40,894 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 22:37:41,617 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 24 proven. 27 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2024-11-09 22:37:41,617 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 22:37:43,098 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 24 proven. 27 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2024-11-09 22:37:43,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 22:37:43,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167825362] [2024-11-09 22:37:43,098 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 22:37:43,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127884848] [2024-11-09 22:37:43,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127884848] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 22:37:43,098 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-09 22:37:43,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2024-11-09 22:37:43,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997032525] [2024-11-09 22:37:43,098 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-09 22:37:43,099 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-09 22:37:43,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 22:37:43,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-09 22:37:43,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2024-11-09 22:37:43,100 INFO L87 Difference]: Start difference. First operand 1117 states and 1680 transitions. Second operand has 20 states, 18 states have (on average 3.388888888888889) internal successors, (61), 19 states have internal predecessors, (61), 9 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 7 states have call predecessors, (28), 7 states have call successors, (28) [2024-11-09 22:37:46,526 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-09 22:37:51,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 22:37:51,656 INFO L93 Difference]: Finished difference Result 1448 states and 2168 transitions. [2024-11-09 22:37:51,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2024-11-09 22:37:51,656 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 3.388888888888889) internal successors, (61), 19 states have internal predecessors, (61), 9 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 7 states have call predecessors, (28), 7 states have call successors, (28) Word has length 112 [2024-11-09 22:37:51,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 22:37:51,664 INFO L225 Difference]: With dead ends: 1448 [2024-11-09 22:37:51,664 INFO L226 Difference]: Without dead ends: 1439 [2024-11-09 22:37:51,666 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 202 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 965 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=778, Invalid=3128, Unknown=0, NotChecked=0, Total=3906 [2024-11-09 22:37:51,666 INFO L432 NwaCegarLoop]: 81 mSDtfsCounter, 219 mSDsluCounter, 753 mSDsCounter, 0 mSdLazyCounter, 889 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 834 SdHoareTripleChecker+Invalid, 1055 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 889 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2024-11-09 22:37:51,667 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [231 Valid, 834 Invalid, 1055 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 889 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2024-11-09 22:37:51,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1439 states. [2024-11-09 22:37:52,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1439 to 1304. [2024-11-09 22:37:52,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1304 states, 756 states have (on average 1.2248677248677249) internal successors, (926), 757 states have internal predecessors, (926), 513 states have call successors, (513), 34 states have call predecessors, (513), 34 states have return successors, (512), 512 states have call predecessors, (512), 512 states have call successors, (512) [2024-11-09 22:37:52,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1304 states to 1304 states and 1951 transitions. [2024-11-09 22:37:52,450 INFO L78 Accepts]: Start accepts. Automaton has 1304 states and 1951 transitions. Word has length 112 [2024-11-09 22:37:52,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 22:37:52,451 INFO L471 AbstractCegarLoop]: Abstraction has 1304 states and 1951 transitions. [2024-11-09 22:37:52,451 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 3.388888888888889) internal successors, (61), 19 states have internal predecessors, (61), 9 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 7 states have call predecessors, (28), 7 states have call successors, (28) [2024-11-09 22:37:52,451 INFO L276 IsEmpty]: Start isEmpty. Operand 1304 states and 1951 transitions. [2024-11-09 22:37:52,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2024-11-09 22:37:52,453 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 22:37:52,453 INFO L215 NwaCegarLoop]: trace histogram [10, 9, 9, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 22:37:52,461 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-09 22:37:52,653 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 22:37:52,654 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 22:37:52,654 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 22:37:52,654 INFO L85 PathProgramCache]: Analyzing trace with hash -229300873, now seen corresponding path program 4 times [2024-11-09 22:37:52,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 22:37:52,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477108898] [2024-11-09 22:37:52,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 22:37:52,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 22:37:52,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 22:37:52,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2023423263] [2024-11-09 22:37:52,679 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 22:37:52,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 22:37:52,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 22:37:52,687 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 22:37:52,688 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-09 22:37:52,759 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 22:37:52,760 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 22:37:52,764 INFO L255 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 60 conjuncts are in the unsatisfiable core [2024-11-09 22:37:52,767 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 22:37:53,874 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 32 proven. 66 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-11-09 22:37:53,874 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 22:37:56,886 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 48 proven. 50 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-11-09 22:37:56,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 22:37:56,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477108898] [2024-11-09 22:37:56,887 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 22:37:56,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023423263] [2024-11-09 22:37:56,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023423263] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 22:37:56,887 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-09 22:37:56,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 31 [2024-11-09 22:37:56,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369759356] [2024-11-09 22:37:56,887 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-09 22:37:56,887 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-09 22:37:56,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 22:37:56,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-09 22:37:56,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=797, Unknown=0, NotChecked=0, Total=930 [2024-11-09 22:37:56,889 INFO L87 Difference]: Start difference. First operand 1304 states and 1951 transitions. Second operand has 31 states, 31 states have (on average 2.967741935483871) internal successors, (92), 28 states have internal predecessors, (92), 9 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) [2024-11-09 22:38:03,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 22:38:03,610 INFO L93 Difference]: Finished difference Result 1489 states and 2186 transitions. [2024-11-09 22:38:03,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-11-09 22:38:03,611 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.967741935483871) internal successors, (92), 28 states have internal predecessors, (92), 9 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) Word has length 110 [2024-11-09 22:38:03,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 22:38:03,618 INFO L225 Difference]: With dead ends: 1489 [2024-11-09 22:38:03,619 INFO L226 Difference]: Without dead ends: 1486 [2024-11-09 22:38:03,620 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 187 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 672 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=656, Invalid=2884, Unknown=0, NotChecked=0, Total=3540 [2024-11-09 22:38:03,621 INFO L432 NwaCegarLoop]: 57 mSDtfsCounter, 198 mSDsluCounter, 777 mSDsCounter, 0 mSdLazyCounter, 705 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 834 SdHoareTripleChecker+Invalid, 871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 705 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2024-11-09 22:38:03,621 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [198 Valid, 834 Invalid, 871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 705 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2024-11-09 22:38:03,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1486 states. [2024-11-09 22:38:04,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1486 to 1366. [2024-11-09 22:38:04,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1366 states, 806 states have (on average 1.2133995037220844) internal successors, (978), 809 states have internal predecessors, (978), 517 states have call successors, (517), 42 states have call predecessors, (517), 42 states have return successors, (516), 514 states have call predecessors, (516), 516 states have call successors, (516) [2024-11-09 22:38:04,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1366 states to 1366 states and 2011 transitions. [2024-11-09 22:38:04,583 INFO L78 Accepts]: Start accepts. Automaton has 1366 states and 2011 transitions. Word has length 110 [2024-11-09 22:38:04,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 22:38:04,583 INFO L471 AbstractCegarLoop]: Abstraction has 1366 states and 2011 transitions. [2024-11-09 22:38:04,584 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.967741935483871) internal successors, (92), 28 states have internal predecessors, (92), 9 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) [2024-11-09 22:38:04,584 INFO L276 IsEmpty]: Start isEmpty. Operand 1366 states and 2011 transitions. [2024-11-09 22:38:04,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2024-11-09 22:38:04,585 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 22:38:04,586 INFO L215 NwaCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 22:38:04,600 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-11-09 22:38:04,789 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 22:38:04,790 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 22:38:04,790 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 22:38:04,790 INFO L85 PathProgramCache]: Analyzing trace with hash -330692873, now seen corresponding path program 3 times [2024-11-09 22:38:04,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 22:38:04,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234577455] [2024-11-09 22:38:04,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 22:38:04,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 22:38:04,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 22:38:04,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1695433106] [2024-11-09 22:38:04,815 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 22:38:04,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 22:38:04,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 22:38:04,819 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 22:38:04,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-09 22:38:04,916 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-09 22:38:04,916 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 22:38:04,917 INFO L255 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 53 conjuncts are in the unsatisfiable core [2024-11-09 22:38:04,919 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 22:38:05,728 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 24 proven. 34 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2024-11-09 22:38:05,728 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 22:38:11,868 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 24 proven. 27 refuted. 7 times theorem prover too weak. 288 trivial. 0 not checked. [2024-11-09 22:38:11,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 22:38:11,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234577455] [2024-11-09 22:38:11,868 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 22:38:11,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695433106] [2024-11-09 22:38:11,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695433106] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 22:38:11,869 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-09 22:38:11,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2024-11-09 22:38:11,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945668220] [2024-11-09 22:38:11,869 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-09 22:38:11,869 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-09 22:38:11,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 22:38:11,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-09 22:38:11,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=383, Unknown=1, NotChecked=0, Total=462 [2024-11-09 22:38:11,870 INFO L87 Difference]: Start difference. First operand 1366 states and 2011 transitions. Second operand has 22 states, 20 states have (on average 3.45) internal successors, (69), 21 states have internal predecessors, (69), 9 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 7 states have call predecessors, (28), 7 states have call successors, (28) [2024-11-09 22:38:17,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 22:38:17,615 INFO L93 Difference]: Finished difference Result 1701 states and 2500 transitions. [2024-11-09 22:38:17,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-11-09 22:38:17,616 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 3.45) internal successors, (69), 21 states have internal predecessors, (69), 9 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 7 states have call predecessors, (28), 7 states have call successors, (28) Word has length 116 [2024-11-09 22:38:17,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 22:38:17,625 INFO L225 Difference]: With dead ends: 1701 [2024-11-09 22:38:17,625 INFO L226 Difference]: Without dead ends: 1692 [2024-11-09 22:38:17,626 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 208 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 649 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=579, Invalid=2390, Unknown=1, NotChecked=0, Total=2970 [2024-11-09 22:38:17,627 INFO L432 NwaCegarLoop]: 69 mSDtfsCounter, 285 mSDsluCounter, 744 mSDsCounter, 0 mSdLazyCounter, 850 mSolverCounterSat, 216 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 813 SdHoareTripleChecker+Invalid, 1066 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 216 IncrementalHoareTripleChecker+Valid, 850 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2024-11-09 22:38:17,627 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [297 Valid, 813 Invalid, 1066 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [216 Valid, 850 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2024-11-09 22:38:17,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1692 states. [2024-11-09 22:38:18,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1692 to 1485. [2024-11-09 22:38:18,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1485 states, 873 states have (on average 1.2130584192439862) internal successors, (1059), 876 states have internal predecessors, (1059), 565 states have call successors, (565), 46 states have call predecessors, (565), 46 states have return successors, (564), 562 states have call predecessors, (564), 564 states have call successors, (564) [2024-11-09 22:38:18,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1485 states to 1485 states and 2188 transitions. [2024-11-09 22:38:18,610 INFO L78 Accepts]: Start accepts. Automaton has 1485 states and 2188 transitions. Word has length 116 [2024-11-09 22:38:18,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 22:38:18,611 INFO L471 AbstractCegarLoop]: Abstraction has 1485 states and 2188 transitions. [2024-11-09 22:38:18,611 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 3.45) internal successors, (69), 21 states have internal predecessors, (69), 9 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 7 states have call predecessors, (28), 7 states have call successors, (28) [2024-11-09 22:38:18,611 INFO L276 IsEmpty]: Start isEmpty. Operand 1485 states and 2188 transitions. [2024-11-09 22:38:18,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2024-11-09 22:38:18,613 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 22:38:18,613 INFO L215 NwaCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 22:38:18,621 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-09 22:38:18,814 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 22:38:18,814 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 22:38:18,814 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 22:38:18,814 INFO L85 PathProgramCache]: Analyzing trace with hash -1458173243, now seen corresponding path program 4 times [2024-11-09 22:38:18,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 22:38:18,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980902915] [2024-11-09 22:38:18,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 22:38:18,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 22:38:18,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 22:38:18,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [935474007] [2024-11-09 22:38:18,848 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 22:38:18,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 22:38:18,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 22:38:18,852 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 22:38:18,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-09 22:38:18,924 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 22:38:18,924 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 22:38:18,925 INFO L255 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 74 conjuncts are in the unsatisfiable core [2024-11-09 22:38:18,928 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 22:38:20,859 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 56 proven. 60 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2024-11-09 22:38:20,860 INFO L311 TraceCheckSpWp]: Computing backward predicates...